Weekly Information about Bright Comets (2024 Mar. 9: North)

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Updated on March 11, 2024
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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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* 12P/Pons-Brooks

It returns for the first time in 70 years. It will brighten up to 4.5 mag in spring. Now it is 6.0 mag (Mar. 9, Osamu Miyazaki). It will turn to fade out rapidly after brightening. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it is not observable now, but it will appear in April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   0 19.22   33 35.3   1.654   1.111    40    6.1  19:26 (120, 16)  
Mar. 16   0 54.40   31  3.6   1.632   1.028    36    5.8  19:32 (118, 15)  

* C/2021 S3 ( PanSTARRS )

Now it is 9.8 mag (Feb. 28, Ken-ichi Kadota). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  18 32.61    1 25.4   1.303   1.365    71    9.1   4:55 (306, 41)  
Mar. 16  18 50.84    7 45.0   1.298   1.395    73    9.1   4:45 (299, 46)  

* 62P/Tsuchinshan 1

It brightened up to 7.4 mag from December to January (Dec. 24, Osamu Miyazaki). Now it is 11.1 mag (Mar. 9, Osamu Miyazaki). Fading rapidly. It will be fainter than 18 mag in June. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  12 30.26   10 23.3   0.567   1.540   161   10.4   1:24 (  0, 65)  
Mar. 16  12 24.03   10 22.7   0.600   1.585   166   10.9   0:50 (  0, 65)  

* 144P/Kushida

Now it is 10.0 mag (Mar. 7, Chris Wyatt). It will fade out rapidly after this. It will be fainter than 18 mag in July. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   5 58.83   17 36.6   0.929   1.484   101   10.5  19:26 ( 26, 71)  
Mar. 16   6 20.60   17 36.7   0.990   1.513    99   10.8  19:32 ( 34, 70)  

* C/2023 A3 ( Tsuchinshan-ATLAS )

It will approach to Sun down to 0.4 a.u. in late September, and it is expected to brighten up to 0 mag. Now it is 11.8 mag (Mar. 9, Osamu Miyazaki). It will brighten rapidly after this. It stays observable in good condition. At the high light, in the Northern Hemisphere, it will be observable in good condition after the perihelion passage. In the Southern Hemisphere, it will be observable in the low sky before and after the perihelion passage.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  15  0.68   -6 56.3   2.803   3.449   123   12.1   3:54 (  0, 48)  
Mar. 16  14 54.37   -6 28.4   2.617   3.362   131   11.9   3:20 (  0, 48)  

* C/2022 E2 ( ATLAS )

Now it is 12.6 mag (Mar. 9, Osamu Miyazaki). It stays 13 mag for a while. It will be unobservable in May in the Southern Hemisphere, or in June in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   7 21.94   27 20.4   3.453   4.035   119   12.5  20:12 (  0, 82)  
Mar. 16   7 13.72   28 18.0   3.551   4.010   110   12.5  19:36 (  0, 83)  

* 13P/Olbers

It returned for the first time in 68 years. It will brighten up to 7.5 mag in summer. Now it is 11.3 mag (Mar. 7, Chris Wyatt). It will brighten rapidly after this. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable in May. At the high light, it locates low in the Northern Hemisphere, or it is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   3 12.14    7  0.8   2.314   2.003    59   13.0  19:26 ( 72, 36)  
Mar. 16   3 19.66    9 32.7   2.320   1.929    54   12.6  19:32 ( 79, 32)  

* 473P/2023 W1 ( NEAT )

First return of a new periodic comet which brightened up to 10 mag in 2001. Now it is 12.8 mag (Mar. 1, Alan Hale). It will fade out rapidly after this. It will be fainter than 18 mag in June. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   0 39.02   35 57.0   1.936   1.414    44   12.7  19:26 (121, 21)  
Mar. 16   0 54.47   40  4.9   1.948   1.427    44   12.9  19:32 (126, 20)  

* 207P/NEAT

Now it is 14.0 mag (Feb. 24, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in May. It stays observable in good condition. Vladimir Bezugly reported it was visible at around 12 mag in the SWAN images in late January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   6 49.37  -10 12.3   0.224   1.095   111   13.1  19:44 (  0, 45)  
Mar. 16   7 59.18   -5 36.9   0.249   1.151   123   13.6  20:26 (  0, 50)  

* C/2020 V2 ( ZTF )

It was observed at 9-10 mag for a long time in 2023. Now it is 13.1 mag (Mar. 5, Chris Wyatt). It stays 14 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  23 50.23  -39 31.0   4.740   3.977    35   13.4  19:26 ( 60,-29)  
Mar. 16  23 55.01  -39 41.4   4.770   4.033    38   13.4  19:32 ( 62,-34)  

* C/2022 L2 ( ATLAS )

Now it is 13.9 mag (Feb. 28, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  14 26.01  -34 49.6   2.045   2.693   120   13.7   3:20 (  0, 20)  
Mar. 16  14  2.43  -36 40.4   1.945   2.693   129   13.6   2:29 (  0, 18)  

* 29P/Schwassmann-Wachmann 1

Now it is 13.2 mag (Mar. 3, Osamu Miyazaki). In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in July. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   8  6.02   21 28.7   5.493   6.184   130   13.6  20:56 (  0, 76)  
Mar. 16   8  4.75   21 26.4   5.585   6.186   123   13.7  20:27 (  0, 76)  

* C/2021 G2 ( ATLAS )

Now it is 13.7 mag (Mar. 7, Chris Wyatt). It stays 14 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  12  8.17  -38  4.3   4.421   5.180   135   13.9   1:02 (  0, 17)  
Mar. 16  12  5.66  -37 31.1   4.360   5.165   140   13.8   0:32 (  0, 17)  

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 13.1 mag (Mar. 5, Chris Wyatt). Fading slowly. It will be getting lower gradually after this, and it will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   5  6.30    6 51.8   5.153   5.208    87   13.8  19:26 ( 41, 55)  
Mar. 16   5  7.12    7 42.6   5.328   5.268    81   13.9  19:32 ( 53, 51)  

* 32P/Comas Sola

Now it is 13.8 mag (Feb. 13, Chris Wyatt). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. It stays extremely low in the Southern Hemisphere. But it will become high in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   3 58.81   26 28.3   2.090   2.060    74   14.0  19:26 ( 87, 56)  
Mar. 16   4 12.96   27 16.6   2.148   2.050    70   14.0  19:32 ( 91, 52)  

* C/2019 U5 ( PanSTARRS )

Now it is 14.3 mag (Mar. 7, Chris Wyatt). Fading slowly. In the Northern Hemisphere, it will be unobservable in May. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   7 57.41  -43 13.4   4.235   4.731   114   14.1  20:46 (  0, 12)  
Mar. 16   7 48.21  -42  9.5   4.318   4.769   111   14.2  20:10 (  0, 13)  

* 46P/Wirtanen

The condition is bad in this apparition. It brightens up to 10 mag in early summer, however, it is not observable at all. Brightening rapidly. It will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   0 16.30   -5 29.0   2.342   1.403    14   14.6  19:26 ( 88, -7)  
Mar. 16   0 36.11   -2 58.2   2.298   1.349    13   14.1  19:32 ( 92, -8)  

* C/2021 T4 ( Lemmon )

It brightened up to 7.8 mag in late July (July 20, Thomas Lehmann). Now it is 16.2 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). Fading gradually. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  14 12.68   11 18.2   2.408   3.200   136   14.5   3:06 (  0, 66)  
Mar. 16  13 58.06   13 34.7   2.407   3.270   144   14.6   2:24 (  0, 68)  

* C/2023 V4 ( Camarasa-Duszanowicz )

It is expected to brighten up to 12 mag in early summer. Now it is 14.3 mag (Feb. 28, Ken-ichi Kadota). Brightening gradually. It stays extremely low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it will be unobservable in April. At the high light, it is not observable in the Southern Hemisphere, or it locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   2 21.14   -1  3.7   2.238   1.703    45   14.8  19:26 ( 73, 21)  
Mar. 16   2 27.84    2 46.0   2.237   1.627    41   14.5  19:32 ( 81, 18)  

* 479P/2023 WM26 ( Elenin )

First return of a new periodic comet which was discovered in 2011, half a year after the perihelion passage. Now it is 15.0 mag (Mar. 5, Chris Wyatt). It stays 15 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   7 42.15    0 35.8   0.636   1.460   125   14.7  20:32 (  0, 55)  
Mar. 16   7 40.79   -1 22.4   0.631   1.415   119   14.5  20:03 (  0, 53)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 14.0 mag (Feb. 16, G. Duszanowicz). It stays 15 mag for a while. In the Northern Hemisphere, it will be unobservable in May. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  10 59.55  -54  7.1   6.905   7.469   121   14.5  23:49 (  0,  1)  
Mar. 16  10 55.13  -54  0.4   6.921   7.514   123   14.6  23:17 (  0,  1)  

* 227P/Catalina-LINEAR

Now it is 14.6 mag (Mar. 2, Thomas Lehmann). It will fade out rapidly after this. It will be fainter than 18 mag in June. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   7 45.65   35 10.7   0.859   1.624   122   14.9  20:37 (180, 90)  
Mar. 16   7 56.00   33 49.0   0.900   1.625   118   14.9  20:20 (  0, 89)  

* C/2023 C2 ( ATLAS )

It is expected to brighten up to 12.5 mag in summer. Now it is 16.0 mag (Feb. 28, ATLAS Chile). Brightening slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Around the high light, it is observable in good condition in the Southern Hemisphere, but it locates very low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  16 17.92  -70 52.4   3.444   3.594    90   15.2   4:55 (359,-16)  
Mar. 16  16 29.04  -71 57.9   3.330   3.542    93   15.1   4:45 (359,-17)  

* 103P/Hartley 2

It approached to Earth down to 0.38 a.u., and brightened up to 8.0 mag in autumn (Sept. 29, Virgilio Gonano). Now it is 15.7 mag (Mar. 3, Ken-ichi Kadota). Fading rapidly. It will be fainter than 18 mag in May. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   8  1.57   -1 26.6   1.315   2.101   130   15.2  20:52 (  0, 54)  
Mar. 16   8  4.61   -0 11.3   1.430   2.162   125   15.5  20:27 (  0, 55)  

* C/2024 C4 ( ATLAS )

Now it is 15.7 mag (Feb. 16, Taras Prystavski). It will fade out rapidly after this. It will be fainter than 18 mag in June. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  17  6.43  -35  4.5   1.224   1.573    89   15.4   4:55 (346, 18)  
Mar. 16  17  4.37  -29 40.2   1.139   1.609    97   15.3   4:45 (349, 24)  

* C/2020 K1 ( PanSTARRS )

It brightened up to 12.1 mag in 2023 spring (May 20, Jose Guilherme de S. Aguiar). Now it is 15.0 mag (Mar. 7, Chris Wyatt). Fading slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   4 15.50  -59 41.3   4.313   4.224    78   15.4  19:26 ( 17, -9)  
Mar. 16   4 22.60  -57 20.9   4.367   4.267    77   15.4  19:32 ( 21, -9)  

* 154P/Brewington

Brightening rapidly. Now it is not observable. It will appear in April in the Southern Hemisphere, or in May in the Northern Hemisphere. It brightens up to 11.5 mag in early summer. But it locates very low around the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  22 48.90   -9 11.9   2.860   1.884     8   16.0   4:55 (271,-15)  
Mar. 16  23  4.68   -6 53.2   2.810   1.844    10   15.5   4:45 (269,-13)  

* C/2019 T4 ( ATLAS )

It brightened up to 11.1 mag in early 2022 (Mar. 31, 2022, F. Kugel, J.-G. Bosch, J. Nicolas). Now it is 15.3 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  17 42.71   23 31.4   6.607   6.615    86   15.6   4:55 (291, 65)  
Mar. 16  17 44.79   24 26.4   6.571   6.654    90   15.6   4:45 (294, 69)  

* C/2023 S3 ( Lemmon )

It must have brightened up to 11 mag in winter. However, it was too low to observe at the high light. Now it is 17.1 mag (Mar. 3, Alan Hale). Fading rapidly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  19 19.00  -27 50.4   1.320   1.211    61   15.6   4:55 (317, 12)  
Mar. 16  19  0.81  -25 27.9   1.199   1.298    71   16.3   4:45 (322, 18)  

* 125P/Spacewatch

Now it is 16.9 mag (Feb. 29, ATLAS South Africa). Fading gradually. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  18 38.28  -13 21.5   1.560   1.527    69   15.8   4:55 (315, 29)  
Mar. 16  18 58.80  -12 41.2   1.523   1.529    71   15.6   4:45 (314, 29)  

* 65P/Gunn

Now it is 16.8 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  13 13.29    2 54.9   2.712   3.614   151   15.7   2:07 (  0, 58)  
Mar. 16  13  9.73    3 19.7   2.654   3.598   158   15.7   1:36 (  0, 58)  

* C/2022 QE78 ( ATLAS )

Now it is 15.8 mag (Feb. 28, Ken-ichi Kadota). It stays 16 mag for a while. It will be getting lower gradually after this, and it will be unobservable in May in the Northern Hemisphere, or in June in the Southern Hemisphere. But it will be observable again in June in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   4 33.21   -5 31.1   6.897   6.768    78   15.8  19:26 ( 42, 40)  
Mar. 16   4 35.51   -4 48.1   6.965   6.740    72   15.8  19:32 ( 50, 36)  

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.8 mag (Feb. 8, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   2 59.13  -62 36.0  16.914  16.611    70   15.8  19:26 ( 23,-17)  
Mar. 16   3  1.60  -62 20.4  16.887  16.587    70   15.8  19:32 ( 26,-19)  

* C/2022 S4 ( Lemmon )

Now it is 16.1 mag (Feb. 22, ATLAS Chile). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. It locates somewhat low in the Southern Hemisphere. But it will become high in summer. The brightness evolution is slower than originally expected.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   1 58.88  -30 54.2   3.678   3.074    46   16.0  19:26 ( 53, -2)  
Mar. 16   2  4.63  -31  4.1   3.675   3.044    44   15.9  19:32 ( 57, -7)  

* C/2023 P1 ( Nishimura )

It approached to Sun down to 0.23 a.u. and brightened up to 2.5 mag in mid September (Sept. 18, Juan Jose Gonzalez). Now it is 17.0 mag (Feb. 21, ATLAS South Africa). Fading gradually. It will be fainter than 18 mag in May. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Thomas Lehmann reported it was bright as 14.1 mag on Feb. 4.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   8 37.03  -48 54.5   2.625   3.190   116   16.1  21:26 (  0,  6)  
Mar. 16   8 26.46  -46 23.7   2.729   3.280   115   16.3  20:48 (  0,  9)  

* C/2023 H2 ( Lemmon )

It approached to Earth down to 0.2 a.u. in early November, and brightened up to 6.2 mag (Nov. 11, Marco Goiato). Fading gradually. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will never be observable after this. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   0 37.37  -44 44.1   2.893   2.283    43   16.2  19:26 ( 51,-23)  
Mar. 16   0 47.35  -45 13.8   2.956   2.370    45   16.4  19:32 ( 52,-27)  

* C/2022 T1 ( Lemmon )

Now it is 17.0 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  14 14.85  -28 43.9   2.771   3.450   126   16.3   3:08 (  0, 26)  
Mar. 16  14 15.63  -28 30.4   2.702   3.454   132   16.2   2:41 (  0, 26)  

* C/2021 Y1 ( ATLAS )

It brightened up to 13 mag in early 2023. It stays 17 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  16 36.30  -47 37.9   3.843   4.029    93   16.4   4:55 (354,  7)  
Mar. 16  16 34.58  -47 27.1   3.793   4.089   100   16.5   4:45 (357,  7)  

* 130P/McNaught-Hughes

It will brighten up to 15 mag from summer to autumn. Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in April. It locates somewhat low in the Southern Hemisphere. But it will become high in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  21 16.06  -19 15.3   2.600   1.850    33   16.7   4:55 (292, -2)  
Mar. 16  21 34.64  -18  1.4   2.557   1.841    35   16.6   4:45 (291, -1)  

* 150P/LONEOS

Now it is 15.4 mag (Feb. 29, Jean-Claude Merlin). Fading gradually. It will be fainter than 18 mag in May. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   8 37.28  -16 40.3   0.897   1.746   134   16.6  21:27 (  0, 38)  
Mar. 16   8 38.39  -16 37.3   0.926   1.746   130   16.7  21:01 (  0, 38)  

* C/2024 A2 ( ATLAS )

Now it is 16.9 mag (Feb. 26, Jean-Claude Merlin). Fading slowly. It will be fainter than 18 mag in July. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   5 51.06  -67 11.2   1.730   1.980    89   16.7  19:26 (  5,-12)  
Mar. 16   5 38.70  -59 22.9   1.721   1.956    87   16.6  19:32 ( 12, -6)  

* 226P/Pigott-LINEAR-Kowalski

Now it is 16.5 mag (Mar. 8, Toshihiko Ikemura, Hirohisa Sato). It will fade out rapidly after this. It will be fainter than 18 mag in April. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   2 22.25   24 14.4   2.318   1.898    53   16.7  19:26 ( 97, 35)  
Mar. 16   2 35.22   26 46.4   2.400   1.922    50   16.9  19:32 (102, 32)  

* C/2023 F3 ( ATLAS )

Now it is 17.4 mag (Feb. 20, ATLAS Chile). It stays 17 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  16 47.20  -48 12.1   5.636   5.753    91   16.9   4:55 (352,  6)  
Mar. 16  16 42.43  -48 58.5   5.496   5.731    98   16.8   4:45 (356,  6)  

* C/2019 E3 ( ATLAS )

Very far object. Now it is 17.1 mag (Feb. 28, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   2 15.41  -67  0.6  10.638  10.331    69   16.8  19:26 ( 23,-23)  
Mar. 16   2 17.61  -66 20.7  10.632  10.334    69   16.8  19:32 ( 25,-25)  

* 30P/Reinmuth 1

Now it is 16.7 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). Brightening slowly. It will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   2 35.81    9 19.0   2.785   2.297    51   16.9  19:26 ( 80, 30)  
Mar. 16   2 47.28   10 30.9   2.816   2.262    47   16.9  19:32 ( 85, 26)  

* C/2022 U3 ( Bok )

Now it is 17.2 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. It will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   4 45.81   27 28.7   4.938   4.952    84   16.9  19:26 ( 80, 66)  
Mar. 16   4 50.01   27  0.5   5.034   4.940    78   16.9  19:32 ( 85, 59)  

* C/2023 R2 ( PanSTARRS )

Now it is 17.3 mag (Feb. 28, Ken-ichi Kadota). It will brighten rapidly after this. It will be unobservable in April in the Northern Hemisphere, or in May in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   2 41.20   -4 18.8   3.099   2.586    50   17.1  19:26 ( 67, 23)  
Mar. 16   2 49.04   -3 30.5   3.082   2.500    46   16.9  19:32 ( 72, 18)  

* C/2022 R6 ( PanSTARRS )

Now it is 16.9 mag (Feb. 25, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   4 50.67  -33  8.5   7.546   7.470    81   17.0  19:26 ( 23, 18)  
Mar. 16   4 53.10  -32 16.2   7.584   7.448    78   17.0  19:32 ( 29, 16)  

* 299P/Catalina-PanSTARRS

Now it is 18.0 mag (Feb. 29, ATLAS Chile). It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  15 56.56  -29 20.4   2.758   3.168   105   17.2   4:49 (  0, 26)  
Mar. 16  15 59.89  -29 35.3   2.663   3.165   111   17.1   4:25 (  0, 25)  

* C/2021 S4 ( Tsuchinshan )

Now it is 17.2 mag (Mar. 2, Thomas Lehmann). It stays 17 mag for a while. It will be unobservable in April in the Southern Hemisphere, or in June in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   4 41.30   39 28.1   6.702   6.703    85   17.2  19:26 (110, 67)  
Mar. 16   4 44.88   39 19.4   6.810   6.706    79   17.2  19:32 (109, 61)  

* C/2023 T3 ( Fuls )

Now it is 16.8 mag (Mar. 2, Jean-Claude Merlin). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   7 43.18   -8 23.9   3.920   4.561   124   17.3  20:33 (  0, 47)  
Mar. 16   7 42.60   -8  1.2   3.956   4.524   119   17.2  20:05 (  0, 47)  

* C/2023 H5 ( Lemmon )

Now it is 16.9 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  10 36.68    8 12.9   4.803   5.781   169   17.3  23:26 (  0, 63)  
Mar. 16  10 32.05    9 27.1   4.797   5.745   160   17.3  22:54 (  0, 64)  

* C/2023 K1 ( ATLAS )

It brightened very rapidly up to 14.9 mag in early summer (July 13, Taras Prystavski). Now it is 18.8 mag (Feb. 7, Toshihiko Ikemura, Hirohisa Sato). Fading gradually. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  14 11.34   29 12.2   2.184   2.944   132   17.3   3:05 (  0, 84)  
Mar. 16  13 55.15   32 59.2   2.201   2.999   136   17.4   2:21 (  0, 88)  

* 478P/2023 Y3 ( ATLAS )

Now it is 18.0 mag (Feb. 7, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. It will be fainter than 18 mag in May. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   6 51.15   21 57.8   1.849   2.419   113   17.4  19:42 (  0, 77)  
Mar. 16   6 55.90   22 28.7   1.922   2.413   107   17.5  19:32 ( 13, 77)  

* C/2024 A1 ( ATLAS )

Now it is 16.0 mag (Feb. 26, Jean-Claude Merlin). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it stays observable in good condition. It stays 15 mag for a long time from late 2024 to early 2026.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   6  2.02  -53 46.2   5.357   5.496    92   17.5  19:26 (  5,  1)  
Mar. 16   6  1.58  -51 55.2   5.341   5.456    91   17.5  19:32 ( 10,  2)  

* C/2022 A3 ( Lemmon-ATLAS )

Now it is 16.2 mag (Feb. 28, ATLAS Chile). It stays 18 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9   4 28.54  -66 17.1   4.007   3.973    80   17.6  19:26 ( 13,-14)  
Mar. 16   4 22.28  -64 53.6   4.048   3.995    79   17.6  19:32 ( 17,-15)  

* C/2020 F2 ( ATLAS )

Now it is 18.1 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  12  0.99   19 31.1   8.530   9.478   161   17.6   0:55 (  0, 74)  
Mar. 16  11 56.50   20  1.5   8.544   9.492   161   17.6   0:23 (  0, 75)  

* 362P/(457175) 2008 GO98

It stays 17 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  15 30.38  -11 10.5   2.388   2.952   115   17.8   4:23 (  0, 44)  
Mar. 16  15 32.95  -10 32.8   2.297   2.944   121   17.7   3:58 (  0, 44)  

* 89P/Russell 2

It will brighten up to 16 mag in summer. Brightening slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  9  20 33.20  -27 39.3   2.806   2.225    45   18.0   4:55 (305,  1)  
Mar. 16  20 49.40  -27  2.5   2.749   2.223    48   17.9   4:45 (305,  1)

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