Weekly Information about Bright Comets (2020 Mar. 21: South)

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Updated on March 22, 2020
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* C/2019 Y4 ( ATLAS )

Brightening very rapidly. Now it is very bright as 7.9 mag (Mar. 19, Maik Meyer). It moves along the same orbit as C/1844 Y1 (Great Comet). It approaches to Sun down to 0.25 a.u. on May 31. It is expected to brighten up to -1 mag. In the Northern Hemisphere, it stays observable in excellent condition until mid May when it brightens up to 1-2 mag. In the Southern Hemisphere, it is not observable until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   9 15.84   67 29.4   1.087   1.670   106    7.9  21:16 (180,-13)  
Mar. 28   8 24.01   68 30.7   1.059   1.547    97    7.5  19:57 (180,-13)  

* C/2017 T2 ( PanSTARRS )

Now it is 8.8 mag (Mar. 19, Maik Meyer). It stays bright as 8-9 mag until July. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   2 34.03   65 42.4   1.772   1.725    70    8.5  19:33 (154,-25)  
Mar. 28   2 50.09   67 37.4   1.771   1.694    69    8.4  19:23 (156,-26)  

* C/2019 Y1 ( ATLAS )

Now it is very bright as 7.9 mag (Mar. 19, Maik Meyer). It stays bright as 8-9 mag until mid April. In the Northern Hemisphere, it stays observable for a long time, although it becomes extremely low in March. In the Southern Hemisphere, it is not observable until June when it fades down to 15 mag. It seems to be a fragment of C/1988 A1 (Liller), like C/1996 Q1 (Tabur) and C/2015 F3 (SWAN).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   0  8.40   35 39.7   1.426   0.844    35    8.4  19:33 (113,-35)  
Mar. 28   0 14.05   42 37.0   1.358   0.869    39    8.6   4:45 (238,-34)  

* C/2020 A2 ( Iwamoto )

It brightened up to 10.2 mag in February (Feb. 6, Maik Meyer). Now it is fading rapidly. It has already faded down to 13.4 mag (Mar. 15, Sandor Szabo). It is observable in good condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   4 55.52   59 26.4   1.345   1.550    81   12.5  19:33 (161, -9)  
Mar. 28   5 18.23   53 17.8   1.530   1.633    77   13.1  19:23 (159, -4)  

* C/2018 N2 ( ASASSN )

Now it is 13.3 mag (Feb. 28, Sandor Szabo). It stays bright as 12-13 mag until summer. But it becomes low in spring. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   0 15.60   51  2.2   3.910   3.372    50   12.7  19:33 (131,-38)  
Mar. 28   0 22.94   52 41.5   3.956   3.397    49   12.7   4:45 (227,-38)  

* 210P/Christensen

It has not been observed yet in this apparition. The condition of this apparition is bad, and it it not observable before the perihelion passage. It will appear in the morning sky at 12 mag in mid April in the Northern Hemisphere, or at 15 mag in mid May in the Southern Hemisphere. However, it will fade out rapidly, and will be fainter than 18 mag in June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   0 44.68    0 37.7   1.602   0.649    10   13.7  19:33 ( 85,-10)  
Mar. 28   1 21.39    5 19.7   1.497   0.577    13   12.7  19:23 ( 91, -8)  

* A/2019 U6

Now it is very bright as 12.4 mag (Mar. 20, Chris Wyatt). It is a comet evidently. It will approach to Sun down to 0.9 a.u. in June, and it is extected to brighten up to 8.5 mag. In the Southern Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it will be unobservable from late March to late June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   4  6.85  -24 24.0   1.940   1.751    64   13.6  19:33 ( 89, 45)  
Mar. 28   4 13.67  -23 55.3   1.895   1.662    61   13.3  19:23 ( 89, 43)  

* 29P/Schwassmann-Wachmann 1

It brightened in outburst on Feb. 3. It is bright as 13.0 mag still now (Feb. 18, Toshihiko Ikemura, Hirohisa Sato). It is already unobservable in the Southern Hemisphere. It will be unobservable soon also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   1 15.18   16 25.0   6.688   5.794    24   13.8  19:33 (102,-12)  
Mar. 28   1 20.62   16 55.1   6.729   5.795    19   13.9  19:23 (100,-15)  

* 246P/NEAT

Now it is 14.7 mag (Mar. 15, Sandor Szabo). It will brighten up to 13.5-14 mag from 2020 to 2021. It stays observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  13  4.56   16 32.4   2.413   3.354   157   14.4   1:11 (180, 39)  
Mar. 28  12 59.86   17  1.3   2.388   3.337   158   14.3   0:38 (180, 38)  

* C/2018 F4 ( PanSTARRS )

Now it is bright as 14.0 mag (Mar. 19, Chris Wyatt). It stays 14 mag until spring. It stays observable for a long time in the Southern Hemisphere. It is not observable until August in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   1 52.10  -51 40.7   4.028   3.582    56   14.4  19:33 ( 46, 30)  
Mar. 28   2  0.31  -49 33.7   4.058   3.600    56   14.5  19:23 ( 47, 28)  

* C/2019 N1 ( ATLAS )

Now it is 14.4 mag (Mar. 15, Sandor Szabo). It will brighten up to 10.5 mag from 2020 December to 2021 January. In the Northern Hemisphere, it stays observable in good condition while the comet will be brightening gradually, but it is not observable at the high light. In the Southern Hemisphere, it is not observable for a long time, but it will be observable in good condition after the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  18 41.07   71  2.4   3.435   3.519    86   14.6   4:39 (190,-18)  
Mar. 28  18 34.37   72 56.2   3.366   3.454    86   14.5   4:45 (187,-19)  

* C/2019 K1 ( ATLAS )

Now it is 16.4 mag (Feb. 28, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it is observable at 14-15 mag from winter to spring. In the Northern Hemisphere, it is not observable until August when it fades down to 17 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   2 57.43  -44  1.1   2.391   2.062    58   14.5  19:33 ( 59, 38)  
Mar. 28   3 13.39  -39 30.6   2.449   2.082    57   14.6  19:23 ( 64, 37)  

* 88P/Howell

Now it is 15.4 mag (Mar. 20, Chris Wyatt). Brightening very rapidly. It will brighten up to 8-9 mag from summer to autumn. It will be observable in excellent condition in the Southern Hemisphere. It locates very low around the high light in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  13 37.06   -4 42.8   1.363   2.308   155   14.9   1:43 (180, 60)  
Mar. 28  13 32.10   -4 13.7   1.286   2.262   163   14.6   1:11 (180, 59)  

* C/2019 F1 ( ATLAS-Africano )

Now it is 15.8 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13 mag in 2021. In 2020, it is observable at 15 mag in good condition from spring to summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  14 57.00  -17 43.3   4.641   5.377   133   15.6   3:03 (180, 73)  
Mar. 28  14 53.87  -18  9.6   4.521   5.335   141   15.5   2:32 (180, 73)  

* 390P/2019 U1 ( Gibbs )

First return of a new periodic comet discovered in 2006. It brightened up to 14.9 mag in January (Jan. 21, R. Fichtl). It will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   1  6.59   -2 57.5   2.632   1.700    16   15.6  19:33 ( 84, -3)  
Mar. 28   1 26.11   -1 27.1   2.643   1.701    15   15.6  19:23 ( 86, -4)  

* C/2017 K2 ( PanSTARRS )

Now it is 15.3 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). 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 unobservable 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)  
Mar. 21  18 18.95   48 57.9   9.558   9.559    87   15.7   4:39 (197,  3)  
Mar. 28  18 19.17   49 30.9   9.473   9.510    89   15.7   4:45 (191,  4)  

* C/2018 A6 ( Gibbs )

Now it is 14.6 mag (Dec. 28, Chris Wyatt). It will be fading slowly after this. In the Southern Hemisphere, it becomes low from February to March, but it stays observable for a long time. In the Northern Hemisphere, it is not observasble until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  23 34.21  -38 13.0   4.439   3.717    38   16.0   4:39 (309, 11)  
Mar. 28  23 39.88  -37  0.9   4.440   3.752    41   16.1   4:45 (305, 15)  

* C/2019 K7 ( Smith )

Now it is 16.0 mag (Dec. 4, Kunihiro Shima). It stays 15-16 mag for a long time until 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  20 51.49   -4 47.4   5.140   4.532    47   16.1   4:39 (259, 24)  
Mar. 28  20 53.09   -3 31.6   5.038   4.523    53   16.1   4:45 (252, 29)  

* C/2016 M1 ( PanSTARRS )

It brightened up to 7.7 mag in June in 2018 (June 19, Juan Jose Gonzalez). Now it is fading. It has already faded down to 15.8 mag (Feb. 18, Toshihiko Ikemura, Hirohisa Sato). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out. In the Northern Hemisphere, it stays low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   5 31.15  -19 28.2   6.302   6.255    82   16.2  19:33 (113, 59)  
Mar. 28   5 32.32  -18 23.4   6.443   6.310    77   16.2  19:23 (110, 56)  

* 124P/Mrkos

Now it is 16.1 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 16 mag in good condition until April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  10 22.23   30 34.6   0.788   1.684   141   16.4  22:24 (180, 25)  
Mar. 28  10 11.93   26 23.3   0.803   1.672   136   16.4  21:46 (180, 29)  

* C/2017 M4 ( ATLAS )

It brightened up to 12-13 mag from 2018 to 2019. Now it is fading. It has already faded down to 16.5 mag (Mar. 8, J. Drummond). In the Southern Hemisphere, it stays observable in good condition for a long time. It will never be observable after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  11 36.28  -76 33.1   4.747   5.075   103   16.4  23:35 (  0, 48)  
Mar. 28  11  2.50  -76  4.4   4.755   5.120   105   16.5  22:34 (  0, 49)  

* C/2019 C1 ( ATLAS )

Now it is 16.1 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 16-17 mag from 2020 to 2021. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  10 45.25  -23  4.2   5.703   6.588   150   16.5  22:47 (180, 78)  
Mar. 28  10 43.66  -22 27.0   5.717   6.586   148   16.5  22:18 (180, 78)  

* C/2018 U1 ( Lemmon )

Now it is 17.2 mag (Feb. 20, Toshihiko Ikemura, Hirohisa Sato). It will stay at 14 mag for a long time from 2021 to 2022. In the Northern Hemisphere, it stays observable in good condition while brightening gradually. In the Southern Hemisphere, it is appearing in the morning sky. But it stays locating low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  19 15.68   31  8.6   6.877   6.675    74   16.6   4:39 (215, 14)  
Mar. 28  19 15.86   31 32.5   6.775   6.642    78   16.5   4:45 (208, 17)  

* 112P/Urata-Niijima

Now it is 16.9 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It stays 16.5 mag until late March. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   2 47.13   31  0.1   1.957   1.517    49   16.5  19:33 (126, -4)  
Mar. 28   3 10.39   33 16.6   2.008   1.542    48   16.6  19:23 (129, -4)  

* P/2019 Y2 ( Fuls )

Now it is 16.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It brightens up to 16.5 mag and will be observable in good condition from March to April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  13 28.70   -0 23.8   1.197   2.155   158   16.5   1:35 (180, 56)  
Mar. 28  13 24.78   -0  1.0   1.183   2.164   165   16.5   1:03 (180, 55)  

* 101P/Chernykh

It brightened up to 14.8 mag in 2019 autumn (Nov. 4, Sandor Szabo). Now it is fading. It has already faded down to 16.1 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It will be unobservable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   2 40.76   12  3.6   3.078   2.418    41   16.5  19:33 (110,  7)  
Mar. 28   2 54.22   13 13.2   3.146   2.434    37   16.6  19:23 (111,  6)  

* 114P/Wiseman-Skiff

It brightened up to 13.8 mag in 2019 winter (Dec. 21, Thomas Lehmann). Now it is fading. It has already faded down to 17.2 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in May. In the Northern Hemisphere, it is observable in excellent condition. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   5 43.09   12 17.7   1.482   1.717    85   16.5  19:33 (147, 36)  
Mar. 28   5 59.98   11 42.3   1.564   1.745    82   16.8  19:23 (147, 37)  

* C/2018 W2 ( Africano )

It brightened up to 8.3 mag in September (Sept. 20, Maik Meyer). Now it is fading. It has already faded down to 14.9 mag (Dec. 28, Chris Wyatt). In the Southern Hemisphere, it stays observable for a long time after this. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  23 47.78  -52 30.0   3.454   2.960    52   16.6   4:39 (323, 17)  
Mar. 28  23 59.15  -53 33.4   3.459   3.031    56   16.7   4:45 (322, 21)  

* C/2017 U7 ( PanSTARRS )

Now it is 15.8 mag (Mar. 1, iTelescope Observatory, Siding Spring). It is observable at 16.5 mag in 2020. It is observable in excellent condition 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)  
Mar. 21  20 11.29  -30 18.5   6.945   6.548    62   16.7   4:39 (280, 44)  
Mar. 28  20 11.01  -30  9.9   6.840   6.557    69   16.7   4:45 (276, 51)  

* 87P/Bus

Now it is 17.4 mag (Feb. 20, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 17 mag and will be observable in excellent condition from March to May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  12 55.12   -5 19.4   1.151   2.131   165   17.1   1:01 (180, 60)  
Mar. 28  12 51.47   -4 41.5   1.128   2.123   173   17.0   0:30 (180, 60)  

* 249P/LINEAR

Now it is 18.3 mag (Mar. 18, Catalina Sky Survey). It will brighten rapidly, and will brighten up to 9.5 mag in June. It is not observable in June. However, it stays observable in good condition until May while the comet is brightening, and after July while the comet will be fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  11 19.40  -13 46.0   0.782   1.759   162   17.3  23:20 (180, 69)  
Mar. 28  11  0.89  -12 13.8   0.710   1.674   156   17.2  22:34 (180, 67)  

* C/2019 T4 ( ATLAS )

Now it is 17.4 mag (Feb. 23, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 13 mag in 2022. In 2020, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it will be unobservable soon. It will be observable again from autumn to winter, but it locating extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   6  9.35  -31  8.1   7.510   7.604    91   17.2  19:33 ( 97, 73)  
Mar. 28   6 10.79  -30 28.6   7.534   7.563    87   17.2  19:23 ( 96, 69)  

* C/2010 U3 ( Boattini )

Now it is 18.0 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly after this, and will be fainter than 18 mag in 2021. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is observable in the extremely low sky only in 2021 spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  13 11.79   56  8.9   8.183   8.750   121   17.2   1:18 (180, -1)  
Mar. 28  13  7.56   56  7.5   8.215   8.761   120   17.2   0:46 (180, -1)  

* (944) Hidalgo

Now it is 17.6 mag (Feb. 3, ATLAS-HKO, Haleakala). It brightened up to 14 mag from autumn to winter in 2018. Now it is fading. It is observable at 17.5 mag in good condition from winter to spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  13 25.99   -3 13.8   3.677   4.620   158   17.3   1:32 (180, 58)  
Mar. 28  13 20.48   -3  9.9   3.682   4.660   166   17.3   0:59 (180, 58)  

* 2I/2019 Q4 ( Borisov )

It brightened up to 14.5 mag in December (Dec. 22, Alan Hale). Now it is 17.4 mag (Mar. 13, E. Jehin, et al.). The orbit is extremely hyperbolic with e=3.35. It is the first interstellar comet in history. It will be fading after this, and will be fainter than 18 mag in April. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  12 50.38  -69 19.4   2.537   3.032   110   17.3   0:57 (  0, 56)  
Mar. 28  12 45.56  -69 52.0   2.619   3.147   113   17.6   0:25 (  0, 55)  

* 257P/Catalina

It will brighten up to 15.5 mag and will be observable in good condition from June to September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  19 11.27   -5 46.9   2.610   2.503    72   17.5   4:39 (240, 43)  
Mar. 28  19 21.73   -4 33.4   2.509   2.478    76   17.3   4:45 (233, 47)  

* 78P/Gehrels 2

It brightened up to 13 mag from autumn to winter in 2018. Now it is fading. It has already faded down to 17.0 mag (Mar. 17, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   8 48.49   10 10.8   2.511   3.250   130   17.4  20:51 (180, 45)  
Mar. 28   8 48.27   10 30.6   2.620   3.282   123   17.6  20:24 (180, 45)  

* C/2017 Y2 ( PanSTARRS )

Now it is 18.0 mag (Oct. 26, Toshihiko Ikemura, Hirohisa Sato). It will be observable at 16.5-17 mag from spring in 2020 to summer in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  20  3.26   20 45.2   5.369   4.975    61   17.5   4:39 (230, 15)  
Mar. 28  20  3.10   21  7.7   5.265   4.956    66   17.4   4:45 (223, 20)  

* 115P/Maury

Now it is 18.6 mag (Feb. 23, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15.5 mag from June to August, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  18 12.28  -11 23.7   2.155   2.335    87   17.7   4:39 (229, 58)  
Mar. 28  18 22.95  -10 41.5   2.053   2.309    91   17.5   4:45 (220, 60)  

* 117P/Helin-Roman-Alu 1

Now it is 17.4 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13 mag in 2022. In 2020, it is observable at 17.5 mag in good condition in spring. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  10 18.53   22  1.3   3.638   4.502   146   17.6  22:21 (180, 33)  
Mar. 28  10 15.17   22  7.4   3.687   4.489   139   17.6  21:50 (180, 33)  

* C/2019 T3 ( ATLAS )

Now it is 17.8 mag (Feb. 23, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 16.5 mag for a long time from 2020 to 2021. In the Northern Hemisphere, it is observable in excellent condition for a long time. In the Southern Hemisphere, it is not observable until 2021 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   1 16.57   68  0.7   6.712   6.423    68   17.7  19:33 (154,-33)  
Mar. 28   1 21.29   67 35.4   6.758   6.405    65   17.7  19:23 (153,-34)  

* C/2014 B1 ( Schwartz )

It brightened up to 15.5 mag from 2017 to 2018. Now it is fading. It has already faded down to 17.6 mag (Feb. 18, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in late April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  12 38.94   10  7.9   9.852  10.822   166   17.8   0:45 (180, 45)  
Mar. 28  12 37.48   10 25.6   9.867  10.840   166   17.9   0:16 (180, 45)  

* 155P/Shoemaker 3

It brightened up to 15.5 mag from autumn to winter. Now it is fading very rapidly. It has already faded down to 17.3 mag (Mar. 18, D. Buczynski). But it may be brighter than this ephemeris.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  11  9.25   17  1.7   1.293   2.250   158   17.9  23:11 (180, 38)  
Mar. 28  11  6.72   17  1.7   1.364   2.292   151   18.3  22:41 (180, 38)  

* 175P/Hergenrother

It is observable at 17.5 mag in good condition in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  18  0.87  -17 42.4   2.134   2.361    90   17.9   4:39 (234, 64)  
Mar. 28  18  7.75  -17 35.6   2.075   2.389    95   17.9   4:45 (222, 68)  

* C/2017 K5 ( PanSTARRS )

Now it is 17.8 mag (Oct. 9, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 18 mag for a long time from 2019 to 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  19 15.26  -14 12.2   7.922   7.679    72   17.9   4:39 (250, 48)  
Mar. 28  19 16.61  -14 29.6   7.808   7.679    78   17.9   4:45 (243, 54)  

* C/2019 F2 ( ATLAS )

Fading. Now it is 18.0 mag (Feb. 26, Hidetaka Sato). It will be fainter than 18 mag soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21  17 59.51   -3 45.0   2.822   3.003    90   17.9   4:39 (217, 53)  
Mar. 28  18  4.09   -2 57.4   2.779   3.049    96   18.0   4:45 (205, 55)  

* C/2015 O1 ( PanSTARRS )

Fading. Now it is 18.8 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   7 43.51   22 52.5   6.829   7.279   113   17.9  19:46 (180, 32)  
Mar. 28   7 41.03   22 39.0   6.990   7.323   105   18.0  19:23 (178, 32)  

* 321P/SOHO

It passed the perihelion on Jan . 17. Now it is fading very rapidly. But it is observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 21   6 58.98   10 12.9   1.009   1.580   103   22.0  19:33 (169, 44)  
Mar. 28   7 10.92   11 30.4   1.196   1.686   100   22.7  19:23 (168, 43)  

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