Weekly Information about Bright Comets (2022 Sept. 3: North)

Japanese version
Home page
Updated on September 4, 2022
Last week South Next week

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.

---------------------------------------------------------------------

* C/2017 K2 ( PanSTARRS )

Now it is bright as 8.5 mag (Aug. 20, Carlos Labordena). It is observable at 7.5-8 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it will be unobservable in mid September. Then it is not observable at the high light until 2023 summer. In the Southern Hemisphere, it stays observable for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  15 56.89  -23 31.0   2.160   2.250    81    8.3  19:51 ( 40, 20)  
Sept.10  15 55.13  -25 55.8   2.230   2.200    75    8.3  19:40 ( 42, 15)  

* C/2021 P4 ( ATLAS )

It brightened up to 10.4 mag from June to July (July 22, Ken-ichi Kadota). Now it is not observable. In the Souther Hemisphere, it will appear in the morning sky at 12 mag in October. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  11 16.56  -13  3.3   2.094   1.220    22   10.4  19:51 ( 90,-25)  
Sept.10  11 32.06  -18 11.8   2.129   1.275    23   10.7  19:40 ( 86,-28)  

* 73P/Schwassmann-Wachmann 3

Now it is 12.2 mag (Aug. 20, Chris Wyatt). It stays 11-12 mag to autumn. It stays observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes extremely low from August to September. Michael Jager detected several fragments at 17.5-19 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  14 15.77  -19 26.0   1.007   0.980    58   11.4  19:51 ( 60,  7)  
Sept.10  14 48.56  -23 45.8   0.983   0.997    60   11.4  19:40 ( 54,  7)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in winter (Jan. 6, Toshiyuki Takahashi). Appering in the morning sky in the Southern Hemisphere. It will appear in the morning sky in October also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   9  8.43   -5 49.5   5.006   4.143    28   11.8   4:06 (273, -7)  
Sept.10   9 14.74   -7 10.7   4.997   4.175    31   11.8   4:12 (278, -2)  

* C/2021 E3 ( ZTF )

It brightened up to 9.3 mag in early summer (June 5, Chris Wyatt). Now it is fading. It has already faded down to 12.8 mag (Aug. 20, Chris Wyatt). In the Southen Hemisphere, it stays observable in good condition for a long time, although it becomes temporarily low in August. In the Northern Hemisphere, it is not observable until November when it fades down to 13 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  10  2.22  -39 33.5   2.595   2.068    48   11.8   4:06 (298,-34)  
Sept.10  10  5.83  -39 14.2   2.669   2.114    46   12.0   4:12 (300,-28)  

* C/2022 E3 ( ZTF )

Now it is bright as 12.3 mag (Aug. 21, Osamu Miyazaki). It will approach to Earth down to 0.29 a.u. in 2023 February, and it is expected to brighten up to 5 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it becomes unobservable from late September to early February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  16 22.92   32 21.6   2.191   2.262    80   12.2  19:51 ( 95, 61)  
Sept.10  16 13.74   31 12.3   2.215   2.181    74   12.1  19:40 ( 95, 56)  

* C/2022 P1 ( NEOWISE )

Bright new comet. Now it is very bright as 12.4 mag (Aug. 31, Michael Mattiazzo). It stays 11-12 mag until November. In the Southern Hemisphere, it stays observable in good condition for a while. In the Northern Hemisphere, it becomes low rapidly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   2 19.51   -0 13.9   1.165   1.942   126   12.7   3:33 (  0, 55)  
Sept.10   1 53.89   -7 12.5   1.010   1.894   139   12.2   2:41 (  0, 48)  

* 41P/Tuttle-Giacobini-Kresak

The condition is worst in this apparition. It is not observable at all.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  11 50.24    5  8.1   1.993   1.060    15   12.3  19:51 (101, -7)  
Sept.10  12 18.25    2 33.1   1.975   1.051    16   12.2  19:40 ( 97, -6)  

* C/2020 V2 ( ZTF )

Now it is 12.6 mag (Aug. 18, Ken-ichi Kadota). It is expected to brighten up to 10 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn, although it becomes very low temporarily in summer. In the Southern Hemipshere, it stays unobservable until 2023 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  10 24.74   52 41.9   4.152   3.514    45   12.5   4:06 (215, 15)  
Sept.10  10 29.79   52 53.9   4.043   3.459    48   12.4   4:12 (218, 19)  

* C/2019 T4 ( ATLAS )

Now it is bright as 12.5 mag (Aug. 18, Ken-ichi Kadota). It stays 12 mag for a while. It becomes unobservable from August to November in the Northern Hemisphere, or from September to December in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  13  0.40   -2 56.6   5.090   4.302    34   12.4  19:51 ( 85,  2)  
Sept.10  13  7.69   -2 56.9   5.155   4.312    29   12.5  19:40 ( 86,  0)  

* C/2020 R7 ( ATLAS )

Now it is 14.0 mag (Aug. 20, Chris Wyatt). It will brighten up to 12.5 mag in summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it locates extremely low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  16 43.85  -38  4.1   2.709   2.959    94   12.9  19:51 ( 23, 12)  
Sept.10  16 42.16  -35 28.3   2.834   2.957    86   13.0  19:40 ( 28, 13)  

* 81P/Wild 2

Appearing in the morning sky in the Northern Hemisphere. It will appear in the morning sky in November also in the Southern Hemisphere. It will brighten up to 11.5 mag in winter

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   9  9.39   15 48.1   2.752   1.888    25   13.1   4:06 (255,  6)  
Sept.10   9 27.18   14 33.5   2.689   1.854    27   12.9   4:12 (258,  8)  

* C/2020 K1 ( PanSTARRS )

Now it is 13.4 mag (Aug. 14, Ken-ichi Kadota). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until November. But it becomes unobservable after that. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from November to January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  17 16.71   -0 57.3   3.624   3.888    97   13.3  19:51 ( 33, 49)  
Sept.10  17 15.46   -2 48.3   3.695   3.848    91   13.3  19:40 ( 38, 45)  

* 22P/Kopff

Now it is 13.6 mag (Aug. 10, Osamu Miyazaki). It stays observable in good condition after this. But it will be fading gradually after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   1 39.22    2 55.8   1.397   2.233   135   13.4   2:53 (  0, 58)  
Sept.10   1 35.76    2 16.1   1.387   2.276   143   13.5   2:22 (  0, 57)  

* C/2019 U5 ( PanSTARRS )

Now it is 13.5 mag (Aug. 18, Hiroshi Abe). It is expected to brighten up to 12 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily in October. In the Southern Hemisphere, it is not observable until mid December. But it will be observable in good condition in 2023.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  13 25.74   21 36.2   4.785   4.074    40   13.6  19:51 (102, 21)  
Sept.10  13 26.90   20  9.9   4.817   4.046    36   13.6  19:40 (103, 17)  

* 117P/Helin-Roman-Alu 1

Now it is 13.7 mag (Aug. 19, Ken-ichi Kadota). It stays observable at 13-14 mag for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  18 27.53  -32  3.2   2.481   3.053   115   13.7  19:51 (  3, 23)  
Sept.10  18 30.64  -31 52.2   2.571   3.056   109   13.8  19:40 (  6, 23)  

* 29P/Schwassmann-Wachmann 1

Now it is 14.9 mag (Aug. 18. ATLAS-HKO, Haleakala).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 40.82   29  0.1   6.438   6.020    61   13.9   4:06 (260, 42)  
Sept.10   6 44.85   28 58.5   6.339   6.022    67   13.9   4:12 (264, 48)  

* 118P/Shoemaker-Levy 4

Now it is 16.8 mag (Aug. 16, ATLAS-MLO, Mauna Loa). It is expected to brighten very rapidly up to 11-12 mag in winter, and it will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   5 55.89   13 46.5   2.028   1.957    71   14.5   4:06 (286, 44)  
Sept.10   6 11.39   13 31.8   1.947   1.937    74   14.2   4:12 (290, 47)  

* 116P/Wild 4

Now it is 13.8 mag (Aug. 20, Chris Wyatt). It is already unobservable in the Northern Hemisphere. It will be unobservable in late September also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  12 57.53   -6 39.9   2.964   2.223    35   14.5  19:51 ( 82,  0)  
Sept.10  13 11.13   -8 10.3   3.013   2.231    32   14.6  19:40 ( 81, -2)  

* 9P/Tempel 1

Now it is 14.2 mag (Aug. 17, Thomas Lehmann). Now it is fading. It stays 13-14 mag for a while. 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)  
Sept. 3  22 37.27  -28 42.9   1.291   2.261   158   14.7  23:47 (  0, 26)  
Sept.10  22 30.77  -28 46.2   1.352   2.301   154   15.0  23:13 (  0, 26)  

* C/2021 Y1 ( ATLAS )

Now it is 16.2 mag (Aug. 25, D. Buczynski). It is expected to brighten up to 12 mag from winter to summer in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 spring. In the Southern Hemisphere, it stays observable in good condition for a long time after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   5  8.44   35 36.1   3.412   3.405    81   15.0   4:06 (259, 62)  
Sept.10   5 12.09   34 52.1   3.244   3.347    87   14.8   4:12 (263, 68)  

* C/2020 Y2 ( ATLAS )

Now it is 14.5 mag (June 19, ATLAS South Africa). It was expected to brighten up to 13 mag in spring. But actually, it is fainter than originally expected. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 44.57  -43 30.6   3.333   3.221    74   15.1   4:06 (322, -5)  
Sept.10   6 40.83  -44 44.7   3.289   3.237    78   15.1   4:12 (328, -1)  

* 255P/Levy

It has not been observed yet in this apparition. It will brighten very rapidly, and it is expected to brighten up to 15 mag in September. It is not observable in the Southern Hemisphere. It locates extremely low even in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   8 51.33   17 50.1   1.563   0.852    29   15.2   4:06 (256, 11)  
Sept.10   9 24.52   13 55.6   1.597   0.849    27   15.2   4:12 (259,  9)  

* 285P/LINEAR

Now it is very bright in outburst as 14.8 mag (Aug. 20, Chris Wyatt). It was extremely faint as 20.6 mag on July 29 (Takaaki Oribe). But it suddenly brightened by 5 mag. It stays observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  18 25.21    8 28.8   1.558   2.160   112   15.4  19:51 (  9, 63)  
Sept.10  18 28.66    6 42.5   1.577   2.121   108   15.5  19:40 ( 15, 61)  

* 327P/Van Ness

Now it is 15.7 mag (Aug. 22, F. Kugel, J. Nicolas, J.-G. Bosch). It will brighten rapidly up to 15 mag in September, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   1 47.86    3 16.2   0.679   1.556   133   15.5   3:01 (  0, 59)  
Sept.10   1 57.41   -2 55.1   0.653   1.558   138   15.4   2:43 (  0, 52)  

* C/2020 S4 ( PanSTARRS )

Appearing in the morning sky. It will brighten up to 14 mag in early 2023, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   7 51.56   17  6.7   4.344   3.681    43   15.6   4:06 (264, 22)  
Sept.10   8  0.85   17  0.9   4.248   3.656    48   15.6   4:12 (268, 27)  

* P/2022 L3 ( ATLAS )

Now it is 15.5 mag (Aug. 31, Michael Jager). It will brighten up to 15 mag in autumn, and it will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   2 48.59   11 54.4   1.833   2.459   116   15.7   4:02 (  0, 67)  
Sept.10   2 50.76   13  5.7   1.751   2.447   122   15.6   3:36 (  0, 68)  

* 119P/Parker-Hartley

Now it is 15.3 mag (Aug. 15, Ken-ichi Kadota). It stays observable in good condition at 15 mag from summer to winter. It locates somwwhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 28.96   19 53.2   2.603   2.333    63   15.7   4:06 (273, 40)  
Sept.10   6 41.44   19 50.7   2.533   2.336    67   15.7   4:12 (276, 45)  

* 45P/Honda-Mrkos-Pajdusakova

It brightened up to 6.7 mag in early May (May 10, Mike Olason). It became brighter than originally predicted by 3 mag. Now it is fading rapidly. The condition is very bad in this apparition. It is not observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  11 51.94    4  5.1   3.022   2.075    16   15.7  19:51 (100, -8)  
Sept.10  12  4.43    2 44.1   3.118   2.151    13   16.0  19:40 (100, -9)  

* C/2021 F1 ( Lemmon-PanSTARRS )

It brightened up to 9.3 mag from spring to early summer (Mar. 24, Michael Jager). It stayed bright for a while even after the perihelion passaage. But it is fading rapidly now. It has already faded down to 17.1 mag (Aug. 9, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   5 20.36  -64  8.0   2.200   2.473    93   15.7   4:06 (344,-13)  
Sept.10   5 28.92  -68 16.8   2.294   2.556    93   16.1   4:12 (349,-16)  

* C/2018 U1 ( Lemmon )

Now it is 16.5 mag (Aug. 17, Thomas Lehmann). It stays at 15-16 mag for a long time. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemiphere, it is not observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  14 22.56  -48 52.2   5.705   5.506    73   15.7  19:51 ( 37,-12)  
Sept.10  14 23.55  -48 57.8   5.822   5.528    68   15.8  19:40 ( 39,-14)  

* C/2022 L1 ( Catalina )

It brightened up to 14.8 mag in August (Aug. 18, Michael Jager). It will be fading after this. In the Northern Hemisphere, it stays observable for a long time, although it becomes extremely low in November. In the Southern Hemisphere, it becomes unobservable in late September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  15 42.74   16  0.7   1.616   1.628    72   15.8  19:51 ( 76, 46)  
Sept.10  15 34.09   16 14.8   1.751   1.611    65   15.9  19:40 ( 81, 41)  

* 61P/Shajn-Schaldach

Now it is 15.5 mag (Aug. 30, Michael Jager). It is expected to brighten up to 15 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)  
Sept. 3   1 36.25    5 59.2   1.322   2.161   135   16.0   2:49 (  0, 61)  
Sept.10   1 37.69    5 30.9   1.267   2.152   142   15.8   2:23 (  0, 61)  

* C/2021 X1 ( Maury-Attard )

Now it is 16.4 mag (Aug. 9, Thomas Lehmann). It will brighten up to 14 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 42.41  -12 38.6   4.423   4.083    64   16.3   4:06 (300, 18)  
Sept.10   6 41.65  -13 24.9   4.284   4.045    69   16.2   4:12 (307, 23)  

* C/2021 G2 ( ATLAS )

Now it is 16.8 mag (June 1, ATLAS South Africa). It will brighten up to 13 mag from 2024 to 2025.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   8 35.67  -26 29.4   8.042   7.387    46   16.3   4:06 (294,-12)  
Sept.10   8 40.31  -27  2.7   7.976   7.351    48   16.3   4:12 (299, -6)  

* C/2021 T2 ( Fuls )

It is expected to brighten up to 13-14 mag in July. But actually, it was not detected, fainter than 17 mag (July 10, Martin Masek). In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it is not observable at all.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  13 16.90  -30 21.8   2.224   1.796    52   16.3  19:51 ( 60,-10)  
Sept.10  13 30.48  -28 31.3   2.396   1.867    47   16.6  19:40 ( 62,-10)  

* C/2020 F5 ( MASTER )

It brightened up to 14 mag in 2021. Now it is fading. It has already faded down to 16.1 mag (Aug. 22, S. Shurpakov). It is observable at 16-17 mag in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  23 52.31   14 55.2   5.141   6.051   152   16.4   1:06 (  0, 70)  
Sept.10  23 48.05   15  6.5   5.144   6.088   157   16.4   0:34 (  0, 70)  

* 395P/2020 H1 ( Catalina-NEAT )

Now it is 16.1 mag (Aug. 23, ATLAS-MLO, Mauna Loa). It continued brightening even after the perihelion passage. It stays observable at 16-17 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  23 15.75   -0 53.1   3.265   4.263   170   16.4   0:30 (  0, 54)  
Sept.10  23 12.41   -1 16.4   3.268   4.273   176   16.4  23:54 (  0, 54)  

* 157P/Tritton

Now it is 16.6 mag (Aug. 31, Michael Jager). It stays observable at 16 mag from summer to winter. In the Southern Hemisphere, it locates low until October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   7 25.50   26 47.5   1.993   1.574    51   16.5   4:06 (258, 32)  
Sept.10   7 47.13   25 23.6   1.957   1.572    52   16.4   4:12 (261, 34)  

* 246P/NEAT

Now it is 15.8 mag (Aug. 19, ATLAS-MLO, Mauna Loa). It brightened up to 14 mag from 2020 to 2021. Now it is fading slowly. It is observable at 16-17 mag in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   0 43.92  -17 58.2   3.003   3.908   149   16.5   1:57 (  0, 37)  
Sept.10   0 40.03  -18 32.8   2.991   3.925   154   16.5   1:26 (  0, 37)  

* 408P/2020 M7 ( Novichonok-Gerke )

Now it is 16.9 mag (Aug. 18, ATLAS-HKO, Haleakala). It will be observable at 16-17 mag in excellent condition from autumn to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   4 25.86    8  5.4   3.251   3.471    94   16.6   4:06 (316, 56)  
Sept.10   4 30.08    7 30.3   3.155   3.470    99   16.5   4:12 (328, 59)  

* C/2021 T4 ( Lemmon )

Now it is 16.5 mag (Aug. 23, Ken-ichi Kadota). It is expected to brighten up to 8 mag in 2023 July. In 2022, it stays observable in good condition while the comet will be brightening gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   3 27.96    4 13.1   3.841   4.275   108   16.7   4:06 (343, 58)  
Sept.10   3 23.89    3 15.5   3.661   4.208   116   16.6   4:09 (  0, 58)  

* 44P/Reinmuth 2

Now it is 16.7 mag (Aug. 21, Ken-ichi Kadota). It will be observable at 16.5 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   3 31.83   26 18.9   1.896   2.340   103   16.7   4:06 (313, 78)  
Sept.10   3 36.57   26 47.1   1.839   2.362   108   16.7   4:12 (345, 82)  

* C/2019 T3 ( ATLAS )

Now it is 16.4 mag (Aug. 23, ATLAS-MLO, Mauna Loa). It stayed bright for a while even after the perihelion passage, but it will be fading after this. It will be fainter than 18 mag in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  21 37.33    7 26.3   6.123   7.063   156   16.7  22:47 (  0, 62)  
Sept.10  21 32.98    6 26.0   6.178   7.088   152   16.8  22:15 (  0, 61)  

* C/2020 H6 ( ATLAS )

Now it is 16.2 mag (Aug. 21, Thomas Lehmann). It stays observable at 16 mag from 2021 to 2022. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  15 33.62   39 57.8   5.636   5.393    71   16.8  19:51 (112, 53)  
Sept.10  15 37.60   39 31.9   5.705   5.420    68   16.9  19:40 (112, 50)  

* C/2021 S3 ( PanSTARRS )

Now it is 16.6 mag (Aug. 22, E. Cortes, B. Lutkenhoner, C. A. Botha). It is expected to brighten up to 7 mag in early 2024. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays low in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 10.15  -23 30.6   6.348   6.154    74   16.9   4:06 (314, 15)  
Sept.10   6 13.12  -24 23.8   6.216   6.093    78   16.8   4:12 (320, 19)  

* C/2019 F1 ( ATLAS-Africano )

It brightened up to 14.2 mag in 2021 summer (July 18, 2021, Taras Prystavski). Now it is fading. It has already faded down to 16.5 mag (Aug. 21, ATLAS South Africa). In the Southern Hemisphere, it stays observable in good condition for a long time. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   2 14.55  -26 29.4   4.572   5.246   127   16.8   3:28 (  0, 29)  
Sept.10   2 11.11  -26 42.8   4.559   5.288   132   16.9   2:57 (  0, 28)  

* C/2019 O3 ( Palomar )

Now it is 16.5 mag (Aug. 26, ATLAS-MLO, Mauna Loa). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  17 13.93   66 29.4   9.385   9.361    85   17.0  19:51 (164, 56)  
Sept.10  17 11.29   66  0.7   9.405   9.375    85   17.0  19:40 (161, 55)  

* P/2022 P2 ( ZTF )

Now it is 16.9 mag (Aug. 31, Michael Jager). It stays observable at 17 mag until winter. In the Southern Hemisphere, it locates extremely low until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   7 44.64   24 28.3   2.584   2.027    46   17.1   4:06 (258, 27)  
Sept.10   8  0.16   23 22.9   2.546   2.043    49   17.1   4:12 (261, 30)  

* C/2021 A1 ( Leonard )

It brightened up to 3 mag from mid December to late December. Now it is fading. It is observable in good condition in the Southern Hemisphere. No observations have been reported since June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  15 59.06  -22 29.8   3.766   3.762    82   17.1  19:51 ( 40, 21)  
Sept.10  16  0.87  -22  8.3   3.966   3.842    75   17.3  19:40 ( 43, 19)  

* C/2020 U5 ( PanSTARRS )

Now it is 17.3 mag (Aug. 18, Michael Jager). It started fading before the perihelion passage. It was predicted to stay at 16 mag for a long time. But actually, it will be fainter than 18 mag in autumn. 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)  
Sept. 3  17 19.17   64 31.5   3.854   3.923    86   17.3  19:51 (163, 58)  
Sept.10  17 22.45   61 38.1   3.869   3.941    86   17.3  19:40 (158, 60)  

* 152P/Helin-Lawrence

Now it is 17.1 mag (Aug. 16, ATLAS South Africa). It will be fading gradually after this. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  19 17.74  -28 28.3   2.630   3.332   126   17.4  20:28 (  0, 27)  
Sept.10  19 18.53  -28 29.1   2.725   3.345   120   17.5  20:02 (  0, 27)  

* C/2020 U4 ( PanSTARRS )

Now it is 17.1 mag (Aug. 11, W. Hasubick). It stays observable at 17-18 mag in 2022. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   2 26.51   29 35.7   4.957   5.465   115   17.5   3:40 (  0, 85)  
Sept.10   2 19.16   29 23.5   4.857   5.476   123   17.4   3:05 (  0, 85)  

* 107P/(4015) Wilson-Harrington

Now it is 17.4 mag (Aug. 9, Michael Jager). In 2022, it stays observable at 17 mag for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6  2.66   27 51.6   0.588   0.975    69   17.4   4:06 (267, 49)  
Sept.10   6 29.45   27 13.5   0.628   0.993    70   17.5   4:12 (268, 51)  

* P/2021 N2 ( Fuls )

It brightened very rapidly up to 15.5 mag from last autumn to last winter (Nov. 2, 2021, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. Appearing in the morning sky.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 22.21   15 19.9   4.489   4.165    65   17.5   4:06 (279, 39)  
Sept.10   6 27.80   14 56.7   4.410   4.181    70   17.4   4:12 (285, 45)  

* 422P/2021 L1 ( Christensen )

It was observed at 17 mag in 2021. It is observable at 17-18 mag also in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   2 59.29   11 11.1   2.945   3.486   114   17.5   4:06 (356, 66)  
Sept.10   2 57.76   11 53.0   2.875   3.507   121   17.5   3:43 (  0, 67)  

* C/2020 O2 ( Amaral )

Now it is 16.9 mag (Aug. 23, Thomas Lehmann). It was observed at 15 mag in 2021. Now it is fading. It stays observable at 16-17 mag for a while in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  17 44.15   29 47.3   5.402   5.638    98   17.5  19:51 ( 70, 77)  
Sept.10  17 44.24   29 27.6   5.497   5.665    94   17.6  19:40 ( 75, 74)  

* C/2021 QM45 ( PanSTARRS )

Now it is 17.2 mag (Aug. 15, Ken-ichi Kadota). In the Northern Hemisphere, it stays observable at 17 mag in good condition for a long time until winter. In the Southern Hemisphere, it stays extremely low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   6 19.46   44  4.3   2.996   2.781    68   17.5   4:06 (241, 50)  
Sept.10   6 34.28   44 36.4   2.933   2.788    71   17.5   4:12 (240, 53)  

* 378P/2019 E2 ( McNaught )

Now it is 18.1 mag (Aug. 19, ATLAS-MLO, Mauna Loa). It stays 18 mag for a long time even after the perihelion passage.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   2 34.61   -6 34.7   4.554   5.180   123   17.7   3:48 (  0, 49)  
Sept.10   2 33.50   -6 58.5   4.501   5.205   129   17.7   3:19 (  0, 48)  

* 442P/2022 G1 ( McNaught )

Now it is 17.9 mag (Aug. 21, ATLAS-HKO, Haleakala). It stays observable at 18 mag in good condition from August to September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  23 51.17   -8 55.2   1.339   2.326   164   17.8   1:05 (  0, 46)  
Sept.10  23 47.38   -9  2.1   1.330   2.329   170   17.8   0:34 (  0, 46)  

* 99P/Kowal 1

Now it is 17.4 mag (Aug. 19, ATLAS-MLO, Mauna Loa). It will be unobservable in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  13 47.03  -11 46.4   5.340   4.737    48   17.8  19:51 ( 71,  6)  
Sept.10  13 52.86  -12 21.2   5.418   4.740    43   17.9  19:40 ( 72,  4)  

* (3200) Phaethon

It approached to Sun down to 0.14 a.u. on May 15. But it was not observable around that time. In the Northern Hemisphere, it stays observable at 17-18 mag in good condition from July to November. In the Southern Hemisphere, it stays extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   4 10.59   43  9.1   1.518   1.841    91   17.9   4:06 (236, 73)  
Sept.10   4  5.91   44  7.7   1.471   1.896    98   17.9   4:12 (217, 78)  

* C/2020 F7 ( Lemmon )

It brightened up to 17 mag in early 2022. Now it is fading. It will be fainter than 18 mag in autumn. It is not observable in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   7 36.53  -51  2.3   5.991   5.753    71   17.9   4:06 (322,-16)  
Sept.10   7 38.70  -52 30.0   5.984   5.772    73   17.9   4:12 (326,-13)  

* 113P/Spitaler

It brightened up to 18 mag in last winter. Appearing in the morning sky. It stays observable at 18 mag for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   7 48.41   23 16.4   2.845   2.255    45   17.9   4:06 (259, 26)  
Sept.10   8  2.31   22 32.5   2.802   2.272    48   17.9   4:12 (262, 30)  

* C/2019 E3 ( ATLAS )

Now it is 17.3 mag (June 27, ATLAS South Africa). Very far object. It stays 18 mag for a long time from 2021 to 2026. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable at all.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   8 13.68  -64 50.9  10.740  10.575    77   17.9   4:06 (332,-27)  
Sept.10   8 16.16  -65 28.7  10.739  10.567    77   17.9   4:12 (334,-25)  

* C/2022 L2 ( ATLAS )

Now it is 17.5 mag (Aug. 8, ATLAS-MLO, Mauna Loa). It is expected to brighten up to 12 mag in 2024. In the Northern Hemisphere, it stays observable in good condition for a long time until 2023 autumn, although it becomes temporarily low in December. In the Southern Hemisphere, it becomes unobservable in October. But it will be observable in excellent condition at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3  18  8.21   28 51.1   5.601   5.922   103   18.0  19:51 ( 51, 81)  
Sept.10  18  4.31   27 43.0   5.626   5.870    99   17.9  19:40 ( 61, 76)  

* C/2014 F3 ( Sheppard-Trujillo )

Now it is 20.0 mg (Aug. 4, J. Maikner). At the discovery, it was expected to be observable at 16-17 mag for a long time from 2020 to 2022. It had been lost for a long time since 2015, but the recent observations are found. Actually, it brigthens up to 20-21 mag at best.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept. 3   0 50.31   11  8.1   5.429   6.273   143   21.1   2:04 (  0, 66)  
Sept.10   0 48.33   11  2.6   5.388   6.289   151   21.0   1:34 (  0, 66)  

---------------------------------------------------------------------

Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.