Weekly Information about Bright Comets (2025 Jan. 4: North)

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Updated on January 10, 2025
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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/2024 G3 ( ATLAS )

It approaches to Sun down to 0.09 a.u. on Jan. 13. Now it is 0.2 mag (Jan. 8, Marco Goiato). It brightens up to -3 mag, but it will turn to fade out rapidly after that. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it becomes unobservable temporarily. But it will be observable again in the evening sky in late January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  17 50.84  -27 55.5   1.260   0.418    16    3.7   6:09 (303, -3)  
Jan. 11  18 52.75  -19  3.8   1.011   0.159     9   -1.0   6:09 (291, -3)  

* C/2023 A3 ( Tsuchinshan-ATLAS )

It brightened up to -3 mag due to the forward scattering on Oct. 9 in the SOHO coronagraph images (Q.-c. Zhang, Charles S. Morris). It became a great comet of 0 mag on the ground. Now it is 10.1 mag (Jan. 2, Carlos Labordena). Fading gradually. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in January. In the Southern Hemisphere, it is not observable now, but it will appear in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  19 44.34    6 35.0   2.797   2.024    31   10.5  18:31 ( 93,  7)  
Jan. 11  19 50.39    7 13.1   2.930   2.130    29   10.8  18:37 ( 97,  2)  

* 13P/Olbers

It returned for the first time in 68 years. It brightened up to 6.2 mag in early summer (July 1, Virgilio Gonano). Fading gradually. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it is not observable now, but it will be observable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  17 31.21  -15 52.8   3.682   2.793    21   12.6   5:38 (292,  3)  
Jan. 11  17 40.63  -16 32.4   3.715   2.866    26   12.8   5:38 (295,  6)  

* C/2022 E2 ( ATLAS )

Now it is 12.7 mag (Jan. 4, Osamu Miyazaki). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   2  8.20   62 17.3   3.238   3.801   118   12.9  19:11 (180, 63)  
Jan. 11   1 52.88   60 10.4   3.343   3.818   111   13.0  18:37 (178, 65)  

* 333P/LINEAR

It approached to Earth down to 0.55 a.u. in early December, and it brightened up to 10.7 mag (Dec. 5, Mike Olason). Now it is 12.7 mag (Dec. 26, Osamu Miyazaki). Fading rapidly. It will be fainter than 18 mag in March. In the Northern Hemisphere, it will be getting lower gradually. 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)  
Jan.  4  21 39.73   40 49.8   1.044   1.218    73   12.9  18:31 (115, 46)  
Jan. 11  21 57.52   36  2.5   1.244   1.259    67   13.7  18:37 (110, 41)  

* 21P/Giacobini-Zinner

Brightening rapidly. Now it is not observable. It will brighten up to 10 mag in spring. But the condition of this apparition is bad. It is not observable when the comet is bright.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  19  9.72   -3  0.4   2.374   1.488    19   13.9  18:31 ( 90, -5)  
Jan. 11  19 32.05   -2 46.8   2.318   1.425    19   13.5  18:37 ( 92, -7)  

* 29P/Schwassmann-Wachmann 1

Major outburst occured between Nov. 1 and 2. Another outburst occured in late November. Now it is 11.5 mag (Jan. 5, Chris Wyatt). It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  10 10.48    8 51.2   5.552   6.254   132   13.7   3:17 (  0, 64)  
Jan. 11  10  8.69    8 54.1   5.474   6.255   139   13.7   2:48 (  0, 64)  

* 249P/LINEAR

It has not been observed yet in this apparition. It brightens up to 11.5 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in March. It will be unobservable soon. It will approach to Sun down to 0.5 a.u. in February and brighten up to 11.5 mag. However, it is not observable at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  17 10.86  -23 51.5   1.552   0.778    24   14.7   5:38 (301,  2)  
Jan. 11  17 59.75  -23 25.9   1.503   0.679    20   13.7   5:38 (298, -2)  

* 12P/Pons-Brooks

It returns for the first time in 70 years. It brightened up to 3.7 mag in early April (Apr. 6, Jose Guilherme Aguiar). Now it is 14.6 mag (Oct. 22, Hidetaka Sato). Fading slowly. In the Northern Hemisphere, it is not observable now, but it will appear in February. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  16 35.42  -48 19.6   4.423   3.700    38   13.9   5:38 (324, -9)  
Jan. 11  16 43.40  -48 29.6   4.442   3.773    42   14.0   5:38 (326, -7)  

* C/2023 C2 ( ATLAS )

It brightened up to 12.7 mag in summer (Aug. 7, Thomas Lehmann). Now it is 14.2 mag (Dec. 10, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in March. In the Southern Hemisphere, it is not observable now, but it will appear in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  20 14.92  -11 10.3   3.316   2.429    21   13.9  18:31 ( 74,  3)  
Jan. 11  20 26.54   -9  9.8   3.358   2.447    18   14.0  18:37 ( 79,  0)  

* C/2022 QE78 ( ATLAS )

Now it is 14.1 mag (Dec. 23, ATLAS Chile). It stays 14 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   6 29.41    5 13.8   4.836   5.776   161   14.1  23:32 (  0, 60)  
Jan. 11   6 26.51    5 46.9   4.837   5.760   157   14.1  23:02 (  0, 61)  

* C/2021 G2 ( ATLAS )

Now it is 13.6 mag (Jan. 5, Chris Wyatt). It stays 14 mag for a while. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  15  3.37  -18 52.0   5.565   5.063    54   14.3   5:38 (320, 25)  
Jan. 11  15  8.76  -18 38.8   5.480   5.073    60   14.2   5:38 (325, 28)  

* 37P/Forbes

Now it is 13.4 mag (Dec. 19, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will be unobservable in February. 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)  
Jan.  4  21  6.15  -14 44.8   2.583   1.814    31   14.3  18:31 ( 63, 11)  
Jan. 11  21 24.09  -13  2.6   2.646   1.844    28   14.5  18:37 ( 67,  9)  

* C/2024 J2 ( Wierzchos )

Brightened rapidly. Now it is 14.9 mag (Dec. 29, Ken-ichi Kadota). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it is not observable now, but it will appear in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  19 27.67   32  2.9   2.434   2.040    55   14.6  18:31 (117, 18)  
Jan. 11  19 52.97   31 10.7   2.427   2.002    53   14.4  18:37 (117, 16)  

* P/2023 S1

Now it is 14.4 mag (Dec. 27, Purple Mountain Observatory, XuYi Station). 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)  
Jan.  4   9 16.10   19 10.9   1.753   2.638   147   14.6   2:23 (  0, 74)  
Jan. 11   9 12.35   19  4.9   1.705   2.633   155   14.6   1:52 (  0, 74)  

* C/2022 N2 ( PanSTARRS )

It is expected to brighten up to 13 mag in 2025 autumn, and it will be observable in good condition. Now it is 14.7 mag (Dec. 26, Ken-ichi Kadota). It stays 14 mag for a while. It will be unobservable in February in the Southern Hemisphere, or in March in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  23  6.13   -2 17.6   4.588   4.238    63   14.6  18:31 ( 49, 40)  
Jan. 11  23 12.16   -1 39.0   4.654   4.212    57   14.6  18:37 ( 56, 36)  

* C/2024 B1 ( Lemmon )

It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 16.1 mag (Jan. 4, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in April. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  17  8.95   20  0.4   2.484   2.007    50   15.3   5:38 (264, 28)  
Jan. 11  17 19.51   18 48.5   2.521   2.060    51   15.5   5:38 (268, 31)  

* 48P/Johnson

Now it is 16.6 mag (Oct. 9, Hidetaka Sato). Brightening slowly. Now it is not observable. It will appear in March in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  19 56.83  -22 40.4   3.001   2.057    13   15.5  18:31 ( 67, -7)  
Jan. 11  20 14.56  -22 11.1   3.005   2.046    10   15.4  18:37 ( 70, -9)  

* 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 (Dec. 16, ATLAS Chile). It stays 15 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)  
Jan.  4   3 37.03  -70 15.7  15.711  15.579    80   15.4  20:39 (  0,-15)  
Jan. 11   3 34.88  -70  0.6  15.707  15.555    79   15.4  20:09 (  0,-15)  

* C/2024 Y1 ( Masek )

Bright new comet. Now it is 14.9 mag (Jan. 2, Martin Masek). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   0 14.34  -65 41.3   1.034   1.082    64   15.4  18:31 (  7,-11)  
Jan. 11   1 28.86  -59  8.9   1.014   1.164    71   15.7  18:37 (  4, -4)  

* C/2024 M1 ( ATLAS )

Almost stellar. Now it is 15.6 mag (Jan. 1, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in March. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   3  4.12   39 38.1   1.016   1.797   128   15.5  20:07 (180, 85)  
Jan. 11   2 46.30   42 48.2   1.140   1.827   118   15.8  19:22 (180, 82)  

* 472P/2023 RL75 ( NEAT-LINEAR )

Now it is 15.2 mag (Dec. 30, ATLAS-MLO, Mauna Loa). Fading slowly. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   6 19.77    9 18.0   2.643   3.597   163   15.6  23:23 (  0, 64)  
Jan. 11   6 16.13    9 22.2   2.681   3.613   158   15.7  22:51 (  0, 64)  

* 43P/Wolf-Harrington

Now it is 15.6 mag (Dec. 16, Ken-ichi Kadota). 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. But it will become high in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   1 46.85   14  5.0   2.428   2.863   106   15.6  18:51 (  0, 69)  
Jan. 11   1 50.81   14  1.9   2.498   2.840   100   15.6  18:37 (  6, 69)  

* C/2024 A1 ( ATLAS )

Now it is 15.8 mag (Jan. 6, A. Pearce, T. Lovejoy). 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)  
Jan.  4   7 31.75  -22 56.6   3.380   4.120   133   15.8   0:39 (  0, 32)  
Jan. 11   7 23.31  -21 29.3   3.329   4.100   136   15.7   0:03 (  0, 33)  

* C/2021 S3 ( PanSTARRS )

It brightened up to 9.6 mag from February to March in 2024 (Feb. 25, 2024, Thomas Lehmann). Now it is 15.6 mag (Dec. 13, Thomas Lehmann). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after March. In the Southern Hemisphere, it is not observable now, but it will appear in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  21 23.71   31 14.9   4.596   4.261    64   15.7  18:31 (104, 40)  
Jan. 11  21 32.39   31  3.1   4.727   4.329    60   15.8  18:37 (106, 35)  

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 15.5 mag (Dec. 24, Katsumi Yoshimoto). Fading slowly. 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)  
Jan.  4   5 42.52   21 21.4   6.716   7.659   162   15.8  22:45 (  0, 76)  
Jan. 11   5 38.48   21 35.4   6.815   7.713   154   15.8  22:14 (  0, 77)  

* C/2023 H5 ( Lemmon )

Now it is 16.1 mag (Jan. 2, ATLAS-HKO, Haleakala). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  12 24.98   38 27.3   4.118   4.554   110   15.9   5:31 (180, 87)  
Jan. 11  12 26.48   40 38.4   4.022   4.536   115   15.9   5:05 (180, 85)  

* C/2023 T3 ( Fuls )

Now it is 16.1 mag (Jan. 4, Ken-ichi Kadota). It stays 16 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)  
Jan.  4  12 51.68  -31  7.5   3.592   3.554    79   16.0   5:38 (355, 24)  
Jan. 11  12 58.01  -32  2.5   3.502   3.551    84   15.9   5:36 (  0, 23)  

* 496P/2024 S3 ( Hill )

First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 16.3 mag (Dec. 25, F. Kugel, J. Nicolas). 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)  
Jan.  4   2 16.06   15 13.7   1.150   1.785   113   16.1  19:20 (  0, 70)  
Jan. 11   2 20.89   17  2.5   1.181   1.753   107   16.0  18:57 (  0, 72)  

* 487P/2024 N5 ( Siding Spring )

First return of a new periodic comet which brightened up to 16 mag in 2012. Now it is 14.8 mag (Dec. 28, D. Buczynski). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. 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)  
Jan.  4   2 41.18   55 28.8   1.254   1.970   122   16.1  19:45 (180, 69)  
Jan. 11   2 40.59   56  3.6   1.340   1.998   117   16.4  19:17 (180, 69)  

* C/2022 R6 ( PanSTARRS )

Now it is 16.2 mag (Jan. 7, ATLAS Chile). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   6 54.78  -30 11.3   6.113   6.752   127   16.2   0:01 (  0, 25)  
Jan. 11   6 51.94  -29 45.4   6.095   6.741   127   16.2  23:27 (  0, 25)  

* C/2023 Q1 ( PanSTARRS )

Now it is 14.7 mag (Jan. 2, Katsumi Yoshimoto). Fading slowly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in April. It is brighter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   8 31.48   75 46.1   1.902   2.601   125   16.2   1:40 (180, 49)  
Jan. 11   8 20.82   75 34.0   1.912   2.613   125   16.3   1:02 (180, 49)  

* 30P/Reinmuth 1

Now it is 17.3 mag (Jan. 5, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  14 11.83   -5 37.7   2.308   2.194    71   16.3   5:38 (325, 43)  
Jan. 11  14 22.15   -6  8.4   2.260   2.228    75   16.3   5:38 (331, 44)  

* C/2019 U5 ( PanSTARRS )

Now it is 15.8 mag (Jan. 5, 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)  
Jan.  4   6 24.99  -51 14.4   6.215   6.549   105   16.3  23:26 (  0,  4)  
Jan. 11   6 15.20  -50 56.7   6.264   6.593   105   16.3  22:49 (  0,  4)  

* C/2020 V2 ( ZTF )

It was observed at 9-10 mag for a long time in 2023. Now it is 15.8 mag (Dec. 7, A. Pearce). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. 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)  
Jan.  4  21 11.32  -61 24.2   7.053   6.394    44   16.3  18:31 ( 27,-19)  
Jan. 11  21 15.97  -61  2.1   7.128   6.448    43   16.4  18:37 ( 30,-22)  

* C/2023 F3 ( ATLAS )

Now it is 16.5 mag (June 6, Giuseppe Pappa). It stays 16 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)  
Jan.  4  13 40.13  -44 33.2   5.499   5.196    67   16.4   5:38 (348,  9)  
Jan. 11  13 37.02  -45  9.4   5.388   5.194    73   16.3   5:38 (353,  9)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 17.1 mag (Dec. 30, ATLAS South Africa). It stays 17 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)  
Jan.  4  12 39.18  -56 20.1   9.614   9.388    73   16.6   5:38 (359, -1)  
Jan. 11  12 39.82  -56 57.5   9.583   9.432    78   16.6   5:18 (  0, -2)  

* C/2023 R1 ( PanSTARRS )

Now it is 16.9 mag (Jan. 5, ATLAS-MLO, Mauna Loa). It stays 16 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in February. But it will be observable again in March. 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)  
Jan.  4  22 10.88   17 53.4   5.791   5.401    62   16.6  18:31 ( 82, 43)  
Jan. 11  22 11.76   17 32.0   5.847   5.359    55   16.6  18:37 ( 87, 37)  

* (3200) Phaethon

Parent asteroid of Geminids meteor shower. Now it is 16.0 mag (Nov. 30, Katsumi Yoshimoto). It will brighten rapidly after this. It will be unobservable in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   1 48.14   22 29.0   0.953   1.579   109   16.7  18:51 (  0, 77)  
Jan. 11   1 39.54   19 53.1   0.986   1.503    99   16.7  18:37 ( 19, 74)  

* 130P/McNaught-Hughes

It brightened up to 14 mag from summer to autumn. Now it is 16.9 mag (Dec. 31, Purple Mountain Observatory, XuYi Station). Fading gradually. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   1 55.70    9 11.8   2.300   2.747   106   16.7  19:00 (  0, 64)  
Jan. 11   1 59.86    9 51.7   2.426   2.781   100   16.9  18:37 (  0, 65)  

* C/2022 L2 ( ATLAS )

Now it is 16.7 mag (Dec. 20, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in March. 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)  
Jan.  4   8  8.83  -43 31.7   3.557   4.027   111   16.8   1:16 (  0, 11)  
Jan. 11   7 52.34  -43 14.3   3.566   4.076   114   16.9   0:32 (  0, 12)  

* 49P/Arend-Rigaux

It will brighten up to 14 mag in spring. Now it is 16.0 mag (Jan. 6, ATLAS Chile). Brightening gradually. In the Southern Hemisphere, it will be getting lower gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   0 20.43  -18 43.3   1.759   1.769    74   17.1  18:31 ( 19, 34)  
Jan. 11   0 31.86  -16 38.5   1.779   1.728    70   16.8  18:37 ( 26, 35)  

* 305P/Skiff

Now it is 16.6 mag (Jan. 4, ATLAS Chile). It will fade out rapidly after this. It will be fainter than 18 mag in February. 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)  
Jan.  4   1 24.38    8 14.6   1.026   1.529    99   16.9  18:31 (  1, 63)  
Jan. 11   1 45.50    8 56.0   1.098   1.561    97   17.0  18:37 (  8, 64)  

* C/2024 L5 ( ATLAS )

Now it is 16.7 mag (Jan. 7, E. Cortes). Brightening slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  15 19.16  -30 11.5   4.049   3.487    49   17.0   5:38 (324, 14)  
Jan. 11  15 18.09  -30 26.1   3.923   3.476    56   16.9   5:38 (329, 17)  

* C/2019 E3 ( ATLAS )

Very far object. Now it is 16.9 mag (Dec. 20, ATLAS Chile). It stays 17 mag for a while. 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)  
Jan.  4   0 45.83  -62 57.8  10.872  10.549    68   16.9  18:31 (  5, -8)  
Jan. 11   0 45.13  -62  7.5  10.924  10.557    65   16.9  18:37 (  9, -8)  

* 105P/Singer Brewster

It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  16 25.21  -17 19.8   2.764   2.057    36   17.0   5:38 (303, 14)  
Jan. 11  16 42.13  -17 35.9   2.716   2.054    39   16.9   5:38 (305, 16)  

* 276P/Vorobjov

Now it is 17.1 mag (Dec. 26, A. Pearce). 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 May. In the Southern Hemisphere, it will be getting lower gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   2 40.07    8 39.5   3.359   3.900   116   16.9  19:44 (  0, 64)  
Jan. 11   2 41.22    8 39.7   3.457   3.901   109   17.0  19:17 (  0, 64)  

* C/2020 K1 ( PanSTARRS )

It brightened up to 12.1 mag in 2023 spring (May 20, 2023, Jose Guilherme de S. Aguiar). Now it is 16.6 mag (Dec. 21, ATLAS Chile). It stays 18 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)  
Jan.  4   6  0.65  -39 29.8   5.755   6.253   116   17.0  23:03 (  0, 16)  
Jan. 11   5 54.99  -38 38.7   5.814   6.301   115   17.0  22:30 (  0, 16)  

* 32P/Comas Sola

It brightened up to 13.5 mag in last winter (Dec. 5, 2023, Chris Wyatt). Now it is 17.8 mag (Dec. 28, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  14  6.28   -6  5.6   3.109   2.959    72   17.1   5:38 (327, 43)  
Jan. 11  14 12.47   -6 37.0   3.050   2.996    77   17.1   5:38 (334, 45)  

* 242P/Spahr

Now it is 17.2 mag (Jan. 3, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and 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)  
Jan.  4   3 46.80  -16  9.7   3.401   3.972   119   17.2  20:50 (  0, 39)  
Jan. 11   3 45.94  -15 38.4   3.474   3.973   113   17.2  20:22 (  0, 39)  

* P/2015 CD60 ( LINEAR )

Now it is 16.8 mag (Dec. 28, Roberto Haver). It will fade out rapidly after this. It will be fainter than 18 mag in February. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   7 12.44   19 14.8   0.988   1.970   175   17.3   0:20 (  0, 74)  
Jan. 11   7  7.22   17 51.8   0.996   1.976   173   17.3  23:42 (  0, 73)  

* 154P/Brewington

It brightened up to 12.0 mag in June (June 13, Ken-ichi Kadota). Now it is 17.8 mag (Jan. 1, D29 Purple Mountain Observatory, XuYi Station). Fading gradually. It will be fainter than 18 mag in February. 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)  
Jan.  4   9 31.12   33  2.3   1.759   2.626   145   17.3   2:38 (  0, 88)  
Jan. 11   9 23.57   33 15.6   1.766   2.677   152   17.4   2:03 (  0, 88)  

* 492P/2024 O3 ( LINEAR )

First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 17.2 mag (Dec. 27, Michael Jager). Fading gradually. It will be fainter than 18 mag in February. 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)  
Jan.  4   9 40.52   31 10.4   1.610   2.469   143   17.4   2:47 (  0, 86)  
Jan. 11   9 35.29   31 37.0   1.612   2.514   150   17.5   2:15 (  0, 86)  

* (308607) 2005 WY3

Peculiar asteroid moving along a cometary orbit. Now it is 18.5 mag (Sept. 11, ATLAS-HKO, Haleakala). 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)  
Jan.  4   3 20.25  -15 36.3   1.933   2.502   114   17.5  20:24 (  0, 40)  
Jan. 11   3 19.98  -15 10.7   1.958   2.455   108   17.5  19:56 (  0, 40)  

* C/2021 S4 ( Tsuchinshan )

Now it is 17.3 mag (Jan. 8, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4   7 30.05   41 54.3   6.169   7.100   159   17.5   0:37 (180, 83)  
Jan. 11   7 27.00   41 57.3   6.184   7.115   159   17.5   0:07 (180, 83)  

* C/2024 G2 ( ATLAS )

Now it is 17.4 mag (Jan. 4, B. Lutkenhoner, E. Cortes). It stays 17 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  13  0.46  -48 18.9   5.686   5.478    72   17.7   5:38 (355,  6)  
Jan. 11  12 58.84  -48 28.5   5.575   5.467    78   17.6   5:37 (  0,  6)  

* 195P/Hill

Now it is 16.7 mag (Dec. 28, Toshiyuki Takahashi). 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)  
Jan.  4   6 40.37   -8 22.2   3.677   4.545   148   17.6  23:43 (  0, 47)  
Jan. 11   6 36.15   -8 39.8   3.683   4.538   146   17.6  23:11 (  0, 46)  

* (468861) 2013 LU28

Now it is 18.0 mag (Aug. 18, Taras Prystavski). It stays 18 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)  
Jan.  4   7 18.74   37 26.5   7.863   8.815   164   17.7   0:26 (180, 88)  
Jan. 11   7 12.85   37 15.5   7.870   8.821   164   17.7  23:48 (180, 88)  

* C/2019 T4 ( ATLAS )

It brightened up to 11 mag in 2022 spring. Now it is 18.0 mag (Nov. 12, D. Buczynski). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. 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)  
Jan.  4  18 16.80   24 17.4   8.989   8.364    48   17.8   5:38 (252, 17)  
Jan. 11  18 21.24   24 31.1   9.015   8.406    49   17.9   5:38 (254, 21)  

* 50P/Arend

Now it is 18.2 mag (Jan. 8, A. Diepvens). Fading slowly. It will be fainter than 18 mag soon. 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)  
Jan.  4  10  8.76   32 52.0   1.956   2.759   137   17.9   3:15 (  0, 88)  
Jan. 11  10  3.68   33 13.8   1.939   2.796   144   17.9   2:43 (  0, 88)  

* C/2024 E1 ( Wierzchos )

It is expected to brighten up to 5 mag in 2026 January. Now it is 17.6 mag (Jan. 4, ATLAS-HKO, Haleakala). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  4  17 22.80   40 34.9   5.587   5.283    67   18.0   5:38 (241, 34)  
Jan. 11  17 29.76   40 41.8   5.494   5.213    68   17.9   5:38 (242, 38)  

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