Weekly Information about Bright Comets (2021 Aug. 14: North)

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Updated on August 15, 2021
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* C/2021 O1 ( Nishimura )

New bright comet. Now it is 9.7 mag (July 30, Michael Jager). Now it is not observable. It will appear in the morning sky in December, but it will be fainter than 15 mag at that time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   9  4.23   29  7.3   1.718   0.797    16    9.2   3:46 (231, -3)  
Aug. 21   9 47.29   26 22.8   1.750   0.812    14    9.3   3:53 (232, -6)  

* 8P/Tuttle

Now it is 11.2 mag (Aug. 10, Ken-ichi Kadota). Brightening very rapidly. It will brighten up to 8.5 mag from September to October. But the condition is bad in this apparition. In the Northern Hemisphere, it is observable only in the extremely low sky until August. In the Southern Hemisphere, it will be observable after late August. But it stays locating low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   7 57.96   16  1.6   1.899   1.047    23    9.8   3:46 (251,  1)  
Aug. 21   8 20.41   10 52.1   1.863   1.031    24    9.4   3:53 (257,  0)  

* 15P/Finlay

It brightened very rapidly. Now it is very bright as 11.1 mag (Aug. 6, Carlos Labordena). It stays 10 mag until August. It stays observable in the morning sky for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   5 51.16   25 53.2   1.338   1.092    53   10.1   3:46 (258, 31)  
Aug. 21   6 16.19   26 29.9   1.375   1.136    54   10.4   3:53 (259, 33)  

* C/2020 T2 ( Palomar )

Now it is very bright as 10.7 mag (Aug. 10, Chris Wyatt). It will be fading after this. In the Northern Hemisphere, it will be getting lower gradually in the evening. In the Southern Hemisphere, it stays observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  14 46.73   -9  2.5   1.999   2.094    80   10.6  20:22 ( 54, 28)  
Aug. 21  14 58.38  -11 40.5   2.081   2.112    77   10.8  20:11 ( 53, 25)  

* 252P/LINEAR

It brightened up to 4 mag in major outburst in 2016. Now it is very bright as 10.5 mag (Aug. 8, Rob Kaufman). In the Southern Hemisphere, it stays locating low in the evening sky until October. In the Northern Hemisphere, it stays locating extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  12  2.80    2 39.3   1.702   1.107    38   10.7  20:22 ( 90,  4)  
Aug. 21  12 32.15    0 21.3   1.734   1.150    39   10.9  20:11 ( 87,  5)  

* 4P/Faye

Now it is 11.2 mag (Aug. 6, Carlos Labordena). It will brighten up to 10 mag from summer to autumn, and it will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4  0.34   18 47.5   1.491   1.640    79   10.9   3:46 (283, 50)  
Aug. 21   4 19.94   18 57.4   1.437   1.630    81   10.7   3:53 (286, 53)  

* C/2019 L3 ( ATLAS )

Now it is 11.2 mag (Aug. 10, Osamu Miyazaki). It will brighten up to 10 mag in winter in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   6 30.80   46 49.8   4.374   3.802    49   11.8   3:46 (232, 32)  
Aug. 21   6 41.33   46 20.1   4.287   3.780    53   11.7   3:53 (234, 36)  

* C/2017 K2 ( PanSTARRS )

Now it is 13.2 mag (Aug. 10, Chris Wyatt). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it is not observable at the high light from 2022 summer to 2023 summer. In the Southern Hemisphere, it stays extremely low for a while. But it will be observable in good condition at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  17  2.11   36 14.5   5.377   5.614    98   12.1  20:22 (100, 79)  
Aug. 21  16 59.64   34 52.4   5.377   5.555    94   12.1  20:11 ( 94, 75)  

* 7P/Pons-Winnecke

Now it is very bright as 11.7 mag (Aug. 10, Chris Wyatt). It stays bright as 10-12 mag until August. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it becomes extremely low after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   0  4.16  -50 27.6   0.674   1.553   132   12.3   2:35 (  0,  5)  
Aug. 21  23 58.30  -51 30.8   0.723   1.601   134   12.6   2:02 (  0,  4)  

* 67P/Churyumov-Gerasimenko

Now it is 13.6 mag (Aug. 10, Chris Wyatt). It will brighten up to 9 mag, and will be observable in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   2  9.69    8 23.4   0.904   1.552   107   13.0   3:46 (332, 61)  
Aug. 21   2 29.19   10 10.9   0.824   1.503   109   12.7   3:53 (338, 64)  

* 6P/d'Arrest

Now it is 13.4 mag (July 29, Thomas Lehmann). It will brighten very rapidly, and it will be observable at 10 mag in good condition from October to December. In the Northern Hemisphere, it locates somewhat low at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16 33.51   -4 10.2   0.752   1.413   105   13.5  20:22 ( 29, 46)  
Aug. 21  16 45.65   -8  2.5   0.759   1.392   102   13.0  20:11 ( 29, 42)  

* C/2019 T4 ( ATLAS )

Now it is 14.6 mag (July 12, Chris Wyatt). It is expected to brighten up to 11.5 mag in 2022. In the Southern Hemisphere, it stas observable in good condition for a long time, although it becomes extremely low temporarily from August to September. In the Northern Hemisphere, it is not observable until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   9 48.54  -22 18.1   5.677   4.905    36   13.7  20:22 ( 87,-38)  
Aug. 21   9 56.46  -22 24.9   5.675   4.877    34   13.7   3:53 (273,-38)  

* 29P/Schwassmann-Wachmann 1

Now it is faint as 16.2 mag (Aug. 12, Jean-Francois Soulier).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4 43.12   30 37.0   6.208   5.904    68   13.7   3:46 (260, 46)  
Aug. 21   4 46.78   30 50.0   6.107   5.906    73   13.7   3:53 (264, 53)  

* 10P/Tempel 2

It brightened up to 10.1 mag in spring (Apr. 10, Marco Goiato). Now it is fading. It has already faded down to 14.8 mag (Aug. 10, Chris Wyatt). It stays observable in good condition for a long time after this while the comet will fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4 18.65    9  1.9   1.964   1.998    77   14.1   3:46 (290, 41)  
Aug. 21   4 27.82    8 59.6   1.931   2.042    81   14.2   3:53 (296, 46)  

* 246P/NEAT

Now it is 14.5 mag (Aug. 10, Chris Wyatt). It stays 13-14 mag from 2020 to 2021. It will be observable in good condition after this in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  18 44.47  -35 31.2   2.191   3.009   136   14.1  21:13 (  0, 19)  
Aug. 21  18 43.48  -35 35.5   2.269   3.020   129   14.2  20:44 (  0, 19)  

* C/2020 PV6 ( PanSTARRS )

Now it is 14.0 mag (Aug. 3, Hirohisa Sato). It will brighten up to 14 mag in summer, and it will be observable in excellent condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  17 26.89   30 39.7   1.861   2.344   105   14.2  20:22 ( 55, 83)  
Aug. 21  17  6.25   29  8.3   1.962   2.330    98   14.3  20:11 ( 71, 75)  

* 17P/Holmes

Outburst occured in early August. Now it is very bright as 14.1 mag (Aug. 7, Michael Jager). In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemipsphere, it stays locating extremely low after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4 46.46   39 55.3   2.674   2.462    67   14.3   3:46 (247, 48)  
Aug. 21   4 58.54   40 46.7   2.625   2.488    71   14.4   3:53 (247, 53)  

* C/2020 J1 ( SONEAR )

Now it is bright as 13.2 mag (Aug. 6, Chris Wyatt). It will be getting lower rapidly after this, and it will be unobservable in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13 41.04   -5 59.3   3.845   3.530    64   14.3  20:22 ( 69, 18)  
Aug. 21  13 41.70   -5 21.5   3.986   3.551    57   14.5  20:11 ( 72, 15)  

* C/2020 F5 ( MASTER )

Now it is 14.4 mag (Aug. 10, Chris Wyatt). It stays 14-15 mag until the end of 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. It locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  23 19.49  -33 42.6   3.582   4.484   149   14.6   1:51 (  0, 21)  
Aug. 21  23 13.18  -33 25.8   3.574   4.499   153   14.6   1:17 (  0, 22)  

* C/2019 F1 ( ATLAS-Africano )

Now it is 14.9 mag (Aug. 10, Chris Wyatt). It was expected to brighten up to 13 mag from spring to summer. But actually, it is fainter than originally expected. It stays 14-15 mag until early autumn. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until July in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  22  9.14  -87 36.2   3.202   3.627   106   14.8   0:48 (  0,-33)  
Aug. 21  21 22.16  -87  6.6   3.239   3.636   105   14.8  23:25 (  0,-32)  

* C/2018 U1 ( Lemmon )

Now it is 14.8 mag (Aug. 6, Hirohisa Sato). It stays at 14-15 mag for a long time from 2021 to 2022. It stays observable in good condition after this while brightening gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16 28.29  -11 46.8   4.660   5.032   105   14.9  20:22 ( 27, 39)  
Aug. 21  16 25.27  -12 47.1   4.772   5.025    98   14.9  20:11 ( 32, 36)  

* 19P/Borrelly

Now it is 17.0 mag (Aug. 4, Slooh.com Chile Observatory, La Dehesa). It will brighten rapidly up to 9 mag in winter. It will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   0 18.34  -51  2.5   1.474   2.269   130   15.2   2:49 (  0,  4)  
Aug. 21   0 16.92  -53  0.7   1.418   2.217   130   14.9   2:21 (  0,  2)  

* C/2021 A1 ( Leonard )

Now it is 16.2 mag (July 30, Thomas Lehmann). It will approach to Earth down to 0.2 a.u. in December, and it is expected to brighten up to 4 mag. In the Northern Hemisphere, it stays observable in good condition for a long time until December while the comet is brightening gradually. In the Southern Hemisphere, it is not observable until mid December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  10 42.45   44  3.0   3.315   2.526    32   15.1  20:22 (135, 13)  
Aug. 21  10 46.77   42 59.6   3.226   2.432    32   14.9  20:11 (136, 10)  

* 106P/Schuster

Now it is 15.6 mag (July 16, Ken-ichi Kadota). It stays 15 mag from summer to autumn. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it will be getting lower gradually after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   5  3.45   19 53.1   1.663   1.529    64   15.2   3:46 (271, 38)  
Aug. 21   5 23.84   21 38.6   1.623   1.529    66   15.2   3:53 (271, 42)  

* C/2021 A7 ( NEOWISE )

It brightened up to 14.2 mag in early summer (June 10, Thomas Lehmann). Now it is not observable. It will be fading after this. In the Northern Hemisphere, it will appear in the morning sky at 16 mag in October. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  10 24.61   17 35.7   2.978   2.001    12   15.4  20:22 (117, -7)  
Aug. 21  10 38.71   18 37.7   3.001   2.018    11   15.4  20:11 (118, -7)  

* C/2020 M5 ( ATLAS )

Now it is 15.4 mag (July 17, Thomas Lehmann). In the Northern Hemisphere, it stays observable at 15-16 mag for a long time from spring to early 2022. In the Southern Hemisphere, it is not observable until the end of 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  12 27.98   45 20.0   3.590   3.005    47   15.4  20:22 (127, 30)  
Aug. 21  12 31.01   42 40.8   3.639   3.004    44   15.5  20:11 (125, 26)  

* 117P/Helin-Roman-Alu 1

Now it is 15.8 mag (July 30, Thomas Lehmann). It will brighten up to 13 mag in 2022. In 2021, it is observable at 14-15 mag in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13 32.11   -6 44.0   3.763   3.419    62   15.5  20:22 ( 70, 16)  
Aug. 21  13 38.75   -7 36.0   3.834   3.405    57   15.5  20:11 ( 71, 13)  

* 132P/Helin-Roman-Alu 2

Now it is 17.2 mag (Aug. 5, F. Kugel, J.-G. Bosch). It will brighten very rapidly up to 14 mag, and it will be observable in excellent condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   0 15.44    3 38.3   1.047   1.911   136   15.8   2:46 (  0, 59)  
Aug. 21   0 19.52    3 34.6   0.978   1.881   141   15.5   2:23 (  0, 59)  

* C/2019 T2 ( Lemmon )

It will brighten up to 14.5 mag from spring to summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   9 56.29  -57 25.3   3.050   2.902    72   15.5  20:22 ( 41,-44)  
Aug. 21  10 12.76  -56  5.6   3.151   2.932    68   15.6  20:11 ( 43,-44)  

* 108P/Ciffreo

Now it is 15.5 mag (July 27, Ken-ichi Kadota). It will brighten rapidly up to 15 mag in autumn. It will be observable in excellent condition in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4 17.32   17  1.9   1.615   1.682    75   15.7   3:46 (282, 46)  
Aug. 21   4 35.18   18 23.2   1.558   1.672    78   15.5   3:53 (284, 50)  

* C/2020 Y2 ( ATLAS )

Now it is 16.3 mag (July 25, J. L. Virlichie, P. Traverse, H. Roy, J. P. Desgrees). It is expected to brighten up to 13 mag in 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  12  2.98  -22 59.6   4.811   4.266    52   15.7  20:22 ( 69,-11)  
Aug. 21  12  4.82  -23 39.3   4.848   4.224    47   15.7  20:11 ( 71,-15)  

* 57P/du Toit-Neujmin-Delporte

Now it is 16.7 mag (July 17, Ken-ichi Kadota). It will brighten up to 15.5 mag from summer to autumn. It stays observable for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  15 42.92  -15 58.3   1.409   1.819    95   15.8  20:22 ( 37, 30)  
Aug. 21  15 54.34  -16 42.2   1.452   1.800    92   15.7  20:11 ( 38, 29)  

* C/2019 N1 ( ATLAS )

It brightened up to 11.6 mag in winter (Feb. 18, Thomas Lehmann). Now it is fading. It has already faded down to 15.6 mag (July 29, Thomas Lehmann). In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   5 32.34  -59 18.9   3.394   3.514    88   15.8   3:46 (331,-18)  
Aug. 21   5 30.09  -60 47.9   3.431   3.579    90   15.9   3:53 (335,-16)  

* C/2020 O2 ( Amaral )

Now it is 15.7 mag (July 17, Toshiyuki Takahashi). It stays observable at 15-16 mag in good condition until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16 29.73  -13  2.8   4.479   4.864   106   15.8  20:22 ( 26, 38)  
Aug. 21  16 29.96  -12 20.4   4.589   4.863    99   15.8  20:11 ( 31, 37)  

* C/2019 U5 ( PanSTARRS )

Now it is 16.1 mag (Aug. 2, ATLAS-HKO, Haleakala). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16 17.67   45 18.0   6.179   6.212    87   15.9  20:22 (126, 69)  
Aug. 21  16 13.65   44 10.4   6.193   6.168    83   15.8  20:11 (121, 66)  

* C/2020 R7 ( ATLAS )

Now it is 16.1 mag (July 26, J. L. Virlichie, P. Traverse, H. Roy, J. P. Desgrees). It will brighten up to 12.5 mag in 2022 summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable until August in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4  1.73  -56 51.5   4.544   4.797    98   16.1   3:46 (338, -8)  
Aug. 21   4  1.63  -58 60.0   4.464   4.749   100   16.0   3:53 (344, -8)  

* 284P/McNaught

Now it is 15.8 mag (Aug. 3, Ken-ichi Kadota). It stays observable at 16 mag in good condition until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  23 23.13   -8 43.3   1.357   2.305   152   16.1   1:54 (  0, 46)  
Aug. 21  23 21.51   -9 52.7   1.325   2.301   159   16.1   1:25 (  0, 45)  

* C/2020 H6 ( ATLAS )

Now it is 16.0 mag (July 18, Ken-ichi Kadota). It stays observable at 16 mag from 2021 to 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13 50.06    2 10.4   5.069   4.718    64   16.1  20:22 ( 74, 25)  
Aug. 21  13 53.82    2 27.9   5.161   4.714    58   16.2  20:11 ( 77, 22)  

* C/2019 T3 ( ATLAS )

Now it is 16.6 mag (July 18, Thomas Lehmann). It is observable at 16 mag from 2020 to 2021. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  22 32.04   43 38.5   5.482   6.058   120   16.3   1:04 (180, 81)  
Aug. 21  22 24.57   42 51.1   5.435   6.067   124   16.3   0:29 (180, 82)  

* C/2018 N2 ( ASASSN )

Now it is 16.0 mag (July 20, Thomas Lehmann). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13 36.48   51 19.0   6.939   6.501    60   16.3  20:22 (130, 42)  
Aug. 21  13 39.36   50  7.5   7.022   6.549    58   16.4  20:11 (129, 40)  

* C/2021 K1 ( ATLAS )

Now it is 15.9 mag (Aug. 2, ATLAS-MLO, Mauna Loa). It will be fading after this, and it will be fainter than 18 mag in November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   1 13.26   -6 33.3   1.964   2.684   125   16.4   3:44 (  0, 49)  
Aug. 21   1 15.37   -7 26.8   1.928   2.709   131   16.4   3:19 (  0, 48)  

* C/2021 E3 ( ZTF )

Now it is 16.1 mag (Aug. 2, F. Kugel, J.-G. Bosch). It is expected to brighten up to 11 mag from spring to summer in 2022. In the Southen Hemisphere, it locates somewhat low in 2021, but it will be observable in good condition at the high light for a long time. In the Northern Hemisphere, it is observable in good condition in 2021, but it will not be observable at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  19 19.93   32 11.7   3.291   3.940   123   16.5  21:47 (  0, 87)  
Aug. 21  19 10.47   30 13.8   3.256   3.877   121   16.4  21:10 (  0, 85)  

* C/2019 O3 ( Palomar )

Now it is 16.1 mag (July 20, E. Bryssinck). It stays at 16-17 mag from 2020 to 2021. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  18 37.94   51 31.6   8.572   8.867   103   16.5  21:05 (180, 73)  
Aug. 21  18 33.58   51 18.5   8.600   8.872   102   16.5  20:33 (180, 74)  

* C/2020 V2 ( ZTF )

Now it is 16.6 mag (July 29, Thomas Lehmann). It is expected to brighten up to 10 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn. In the Southern Hemipshere, it stays unobservable until 2023 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  12  7.31   35 17.4   7.339   6.597    40   16.5  20:22 (119, 22)  
Aug. 21  12  9.71   34 57.9   7.321   6.543    37   16.5  20:11 (120, 19)  

* 2004 XM199

Announced as a bright Centaur-type asteroid. But Hidetaka Sato revealed that this is Phoebe, one of the satellites of Saturn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  20 48.72  -18 38.9   8.881   9.875   168   16.5  23:16 (  0, 36)  
Aug. 21  20 46.86  -18 46.9   8.913   9.876   161   16.6  22:47 (  0, 36)  

* C/2020 K1 ( PanSTARRS )

Now it is 16.8 mag (July 18, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it is observable in good condition in 2021. But it is observable only until November in 2022. In the Southern Hemisphere, it locates extremely low in 2021. But it will be observable in good condition at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  17 32.35   40  8.0   6.157   6.441   101   16.7  20:22 (141, 83)  
Aug. 21  17 29.63   38 53.0   6.156   6.393    99   16.6  20:11 (117, 81)  

* C/2021 D2 ( ZTF )

Now it is 17.1 mag (Aug. 2, ATLAS-HKO, Haleakala). It will brighten up to 15.5 mag in winter. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  17 10.01   73 44.8   3.392   3.413    82   16.7  20:22 (175, 51)  
Aug. 21  16 43.30   72 49.2   3.377   3.379    81   16.6  20:11 (170, 51)  

* C/2019 K7 ( Smith )

Now it is 16.5 mag (July 29, ATLAS-HKO, Haleakala). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable after this in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16 28.37   55  2.6   5.584   5.601    85   16.6  20:22 (150, 65)  
Aug. 21  16 23.13   54 13.9   5.659   5.633    83   16.7  20:11 (144, 63)  

* 110P/Hartley 3

Now it is 18.0 mag (Aug. 1, Palomar Mountain--ZTF). Appearing in the morning sky. It will brightens rapidly. And it will be observable at 15 mag in excellent condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   6 17.91   28 20.2   3.060   2.489    47   16.8   3:46 (253, 27)  
Aug. 21   6 31.62   28  1.0   2.990   2.482    51   16.7   3:53 (256, 31)  

* 193P/LINEAR-NEAT

Now it is 15.9 mag (Aug. 4, Purple Mountain Observatory, XuYi Station). It will brighten up to 16.5 mag in autumn and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  23 34.52   -1 21.1   1.246   2.170   147   16.8   2:06 (  0, 54)  
Aug. 21  23 31.08   -0 45.8   1.210   2.168   154   16.7   1:35 (  0, 54)  

* C/2020 S3 ( Erasmus )

It brightened up to 3 mag in December in the SOHO spacecraft images (Dec. 18, Hirohisa Sato). Now it is 16.2 mag (July 22, ATLAS-MLO, Mauna Loa). It stays observable in good condition after this while the comet will be fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   0  4.00   19 51.0   3.206   3.930   129   16.7   2:35 (  0, 75)  
Aug. 21  23 58.41   19 29.4   3.211   4.011   136   16.8   2:02 (  0, 75)  

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.8 mag (Apr. 11, J. Drummond). It will brighten up to 16 mag in winter, and it will be observable in excellent condition. It will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   5 54.35    2 25.5   4.485   4.000    55   16.8   3:46 (280, 18)  
Aug. 21   6  1.14    2 22.5   4.402   3.993    59   16.7   3:53 (284, 23)  

* 52P/Harrington-Abell

It stays observable at 16 mag from autumn to winter. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it stays extremely low until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   7 22.63   28 47.4   2.601   1.844    33   16.9   3:46 (245, 15)  
Aug. 21   7 43.03   27 57.4   2.552   1.828    35   16.7   3:53 (247, 17)  

* 119P/Parker-Hartley

Now it is 18.9 mag (Aug. 3, ATLAS-HKO, Haleakala). It will brighten up to 14.5 mag in 2022 winter. In 2021, it stays observable in good condition while the comet will be brightening gradually. It is fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  22 59.68  -15  9.4   2.308   3.275   159   17.0   1:31 (  0, 40)  
Aug. 21  22 55.58  -15 50.7   2.258   3.249   166   16.9   1:00 (  0, 39)  

* 104P/Kowal 2

Now it is 19.4 mag (Aug. 12, Thomas Lehmann). It will brightens rapidly. And it is expected to be observable at 10-11 mag in good condition from December to February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  22 42.92    1 22.0   1.111   2.081   156   17.4   1:14 (  0, 56)  
Aug. 21  22 37.17    0 57.9   1.030   2.022   163   17.0   0:41 (  0, 56)  

* 241P/LINEAR

Appearing in the morning sky. Now it is 17.3 mag (Aug. 2, F. Kugel, J.-G. Bosch). In the Northern Hemisphere, it stays observable at 17 mag in good condition until winter. In the Southern Hemisphere, it stays locating extremely low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   6 11.24   37 48.5   2.407   1.926    50   17.2   3:46 (244, 32)  
Aug. 21   6 31.36   37 25.5   2.369   1.934    52   17.2   3:53 (245, 35)  

* C/2017 T2 ( PanSTARRS )

It had been observed as 8-9 mag for a long time in 2020. Now it is fading. It has already faded down to 17.6 mag (July 29, J. Drummond). It will be observable in good condition after this in the Southern Hemisphere. It locates extremely low after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16  7.38  -45 35.6   5.083   5.450   106   17.2  20:22 ( 18,  6)  
Aug. 21  16  7.77  -45 26.5   5.245   5.511    99   17.3  20:11 ( 21,  5)  

* 28P/Neujmin 1

Now it is 16.7 mag (July 18, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition after this while the comet will be fading. In the Southern Hemisphere, it stays locating extremely low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4 40.80   34 11.9   2.548   2.368    68   17.2   3:46 (256, 48)  
Aug. 21   4 50.76   35  5.2   2.521   2.422    72   17.2   3:53 (256, 53)  

* C/2017 Y2 ( PanSTARRS )

Now it is 16.6 mag (July 25, ATLAS-MLO, Mauna Loa). It will be fading after this, and it will be fainter than 18 mag in October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  15 13.07  -21 46.8   5.033   5.144    90   17.3  20:22 ( 40, 22)  
Aug. 21  15 10.97  -22 11.4   5.184   5.168    83   17.3  20:11 ( 44, 19)  

* C/2020 U5 ( PanSTARRS )

It will brighten up to 16 mag in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2023.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   7 52.62   47 27.8   5.116   4.377    39   17.5   3:46 (225, 19)  
Aug. 21   8  0.52   48 21.2   5.019   4.347    43   17.4   3:53 (227, 24)  

* C/2020 F2 ( ATLAS )

Now it is 17.7 mag (July 25, Michael Jager). It stays observable at 17-18 mag for a long time until 2024.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  14 19.23   -5 20.2   9.268   9.030    73   17.4  20:22 ( 63, 25)  
Aug. 21  14 18.91   -5 19.6   9.375   9.021    66   17.5  20:11 ( 66, 22)  

* P/2021 L5 ( La Sagra )

First return of a new periodic comet which brightened up to 17 mag in 2012. Now it is 18.3 mag (July 10, ATLAS-HKO, Haleakala). In the Southern Hemisphere, it is observable at 17.5 mag in excellent condition in summer. It locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  19 35.74  -41 22.9   0.730   1.654   142   17.5  22:04 (  0, 14)  
Aug. 21  19 32.67  -41 31.8   0.718   1.610   136   17.5  21:33 (  0, 14)  

* 395P/2020 H1 ( Catalina-NEAT )

Now it is 16.9 mag (July 19, ATLAS-HKO, Haleakala)。It stays observable at 17-18 mag for a long time from 2021 to 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  19  7.42  -18 35.9   3.261   4.129   144   17.5  21:35 (  0, 36)  
Aug. 21  19  5.66  -18 41.9   3.320   4.123   137   17.5  21:06 (  0, 36)  

* P/2021 N2 ( Fuls )

Now it is 17.9 mag (July 18, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   2 24.78   18 47.4   3.528   3.854   101   17.6   3:46 (312, 68)  
Aug. 21   2 27.67   18 51.8   3.427   3.849   107   17.5   3:53 (330, 72)  

* C/2020 T4 ( PanSTARRS )

Now it is extremely faint as 20.5 mag (June 17, M. Jaeger, E. Prosperi, S. Prosperi). It was predicted to brighten up to 17.5 mag in 2021 summer. But actually, it is much fainter than predicted. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13  5.92   62 27.5   2.556   2.240    60   17.5  20:22 (145, 39)  
Aug. 21  13 26.70   58  1.3   2.588   2.258    59   17.6  20:11 (139, 39)  

* C/2017 U7 ( PanSTARRS )

Now it is 16.4 mag (July 31, ATLAS-HKO, Haleakala). It will be fading slowly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  16 59.66  -11  7.9   7.480   7.935   113   17.6  20:22 ( 18, 42)  
Aug. 21  16 57.20  -11  0.2   7.622   7.961   106   17.7  20:11 ( 24, 41)  

* 88P/Howell

It brightened up to 8.2 mag in 2020 autumn (Oct. 13, 2020, Chris Wyatt). Now it is 18.9 mag (July 15, Palomar Mountain--ZTF). It is observable at 18 mag in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   4 52.72   22 34.1   3.371   3.112    66   17.7   3:46 (269, 41)  
Aug. 21   4 58.77   22 48.0   3.313   3.150    71   17.8   3:53 (273, 47)  

* P/2021 L1 ( Christensen )

First return of a new periodic comet which brightened up to 17 mag in 2006. Now it is 17.4 mag (June 15, Taras Prystavski). It stays 18 mag from 2021 to 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  22 19.62  -69 42.8   2.600   3.279   124   17.7   0:52 (  0,-15)  
Aug. 21  22  8.88  -69 36.7   2.606   3.264   122   17.7   0:14 (  0,-15)  

* 378P/2019 E2 ( McNaught )

It brightened up to 18.5 mag in 2020 spring (Apr. 2, 2020, W. Hasubick). Now it is 19.3 mag (July 16, J. P. Desgrees, J. L. Virlichie, P. Traverse, H. Roy). It has passed the perihelion in 2020 October. At the discovery in 2005, it stayed bright for several years even after the perihelion passage. In this apparition, it may stay observable at 18 mag from 2021 to 2024.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  23 47.81  -26 22.3   2.971   3.857   146   17.8   2:19 (  0, 29)  
Aug. 21  23 45.13  -27  6.7   2.960   3.878   151   17.7   1:49 (  0, 28)  

* 152P/Helin-Lawrence

Now it is 17.7 mag (July 13, ATLAS-MLO, Mauna Loa). It will brighten up to 16 mag in 2022. In 2021, it stays observable at 18 mag until September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13 54.48   -4 36.3   3.454   3.202    67   17.8  20:22 ( 67, 21)  
Aug. 21  14  1.56   -5 35.5   3.530   3.193    62   17.8  20:11 ( 68, 19)  

* 413P/2020 W4 ( Larson )

First return of a new periodic comet which brightened up to 16 mag in 2014. Now it is 16.9 mag (July 5, Thomas Lehmann). It stays observable at 16-17 mag in good condition until July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14  13 38.39  -14 21.1   2.333   2.148    66   17.8  20:22 ( 62, 12)  
Aug. 21  13 50.53  -16  1.3   2.404   2.154    63   17.9  20:11 ( 62, 10)  

* P/2014 W12 ( Gibbs )

First return of a new periodic comet observed at 17 mag in 2014. It has not been observed yet in this apparition. The orbital elements are improved based on the new observations from June to July in 2014, and the perihelion date moved about 1 month earlier. It is expected to brighten up to 18 mag in summer, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   3 25.64   28 32.6   1.677   1.881    84   17.9   3:46 (274, 62)  
Aug. 21   3 36.63   29 34.8   1.638   1.911    89   17.9   3:53 (276, 67)  

* C/2020 U4 ( PanSTARRS )

It stays 17 mag for a long time from 2021 to 2022. It is observable in excellent condition in the Northern Hemisphere, It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   5 39.67   31 32.9   6.139   5.634    55   18.0   3:46 (253, 36)  
Aug. 21   5 39.38   31 48.4   6.011   5.618    62   17.9   3:53 (257, 43)  

* C/2017 B3 ( LINEAR )

It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, 2019, Chris Wyatt). Now it is fading slowly. It stays 18 mag until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 14   0 45.04   21 39.1   7.726   8.292   120   17.9   3:16 (  0, 77)  
Aug. 21   0 42.85   21 53.3   7.680   8.335   127   17.9   2:46 (  0, 77)  

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