Weekly Information about Bright Comets (2021 Jan. 23: North)

Japanese version Home page	Updated on January 23, 2021
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

C/2020 S3 ( Erasmus ) It brightened up to 5.6 mag in early December (Dec. 9, Marco Goiato). In mid December, it was visible at about 3 mag in the SOHO spacecraft images (Dec. 18, Hirohisa Sato). Now it is not observable. It will appear in the morning sky again in April. But then it will be fainter than 15 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 20 39.57 -7 41.8 1.996 1.058 12 10.7 18:47 ( 86, -8) Jan. 30 21 3.89 -5 30.7 2.127 1.186 12 11.4 18:53 ( 89, -8) P/2021 A3 ( STEREO ) New periodic comet discovered in 2016. It had been predicted to return in 2024. But actually, it returned much earlier than predicted. Now it is bright as 11 mag (Jan. 16, Giuseppe Pappa). It passes the perihelion on Jan. 25. It will be unobservable soon also in the Northern Hemisphere. In the Southern Hemisphere, it will appear in the morning sky in early February, then it stays observable in excellent condition after that. In the Northern Hemisphere, it is hardly observable after the perihelion passage. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 22 4.47 -20 38.9 0.558 0.529 24 10.8 18:47 ( 63, 1) Jan. 30 21 49.80 -31 58.8 0.507 0.535 19 10.7 18:53 ( 60,-15) 141P/Machholz 2 It brightened very rapidly in early December. Now it is very bright as 10.6 mag (Jan. 13, Chris Wyatt). In addition, Michael Jager observed two more components of 15-16 mag. It stays observable for a long time in this apparition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 1 31.69 -5 3.5 0.537 1.007 76 10.9 18:47 ( 30, 46) Jan. 30 2 25.23 -3 24.9 0.560 1.073 83 11.6 18:53 ( 25, 49) C/2021 A2 ( NEOWISE ) New bright comet. Now it is 11.4 mag (Jan. 13, Chris Wyatt). It brightens up to 11 mag in early February. In the Northern Hemisphere, it will be getting higher rapidly after this, and then it stays observable in excellent condition. In the Southern Heimsphere, now it is observable in excellent condition. But it will be getting lower rapidly after February, and it will be unobservable in mid March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 9 0.66 -37 26.1 0.616 1.413 122 11.5 0:55 ( 0, 17) Jan. 30 8 1.32 -22 49.0 0.523 1.417 137 11.1 23:17 ( 0, 34) C/2019 N1 ( ATLAS ) Now it is bright as 11.9 mag (Dec. 3, Ken-ichi Kadota). It stays 12 mag until March. In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 14 57.60 -59 55.7 1.950 1.836 68 11.7 5:36 (351, -6) Jan. 30 15 8.00 -65 55.5 1.925 1.872 72 11.7 5:33 (354,-12) C/2020 M3 ( ATLAS ) It brightened up to 7.3 mag in November (Nov. 7, Marco Goiato). Now it is fading. But it is bright as 11.0 mag still now (Jan. 13, Carlos Labordena). In the Northern Hemisphere, it stays observable in excellent condition for a long time. In the Southern Hemisphere, it stays locating extremely low after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 5 24.48 48 34.1 0.973 1.804 134 11.7 21:14 (180, 76) Jan. 30 5 31.52 48 44.5 1.084 1.872 129 12.2 20:53 (180, 76) C/2020 R4 ( ATLAS ) Brightened rapidly. Now it is very bright as 12.6 mag (Dec. 25, Ken-ichi Kadota). It will approach to Earth down to 0.46 a.u. in April, and it is expected to brighten up to 9 mag and to be observable in excellent condition. It becomes unobservable temporarily from January to February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 21 3.17 -16 36.0 2.161 1.207 10 12.0 18:47 ( 76, -8) Jan. 30 20 59.37 -15 48.6 2.134 1.151 2 11.8 18:53 ( 81,-15) 88P/Howell It brightened up to 8.2 mag in autumn (Oct. 13, Chris Wyatt). Now it is fading. It has already faded down to 12.3 mag (Jan. 13, Chris Wyatt). It stays observable in the evening low sky while it will be getting fainter gradually, until January in the Southern Hemisphere, or late February in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 23 11.15 -7 58.7 2.433 1.837 42 12.4 18:47 ( 63, 22) Jan. 30 23 27.66 -6 4.9 2.524 1.882 40 12.7 18:53 ( 67, 20) 156P/Russell-LINEAR Brightened rapidly. It brightened up to 9.7 mag in November (Nov. 15, Chris Wyatt). Now it is fading. But it is bright as 11.7 mag still now (Jan. 13, Osamu Miyazaki). In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it locates extremely low after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 2 13.40 34 17.8 1.025 1.533 99 12.8 18:47 ( 90, 81) Jan. 30 2 34.65 36 4.2 1.105 1.572 97 13.3 18:53 (100, 79) 398P/2020 P2 ( Boattini ) First return of a new periodic comet which brightened up to 13 mag in 2009. Now it is bright as 12.2 mag (Jan. 13, Osamu Miyazaki). It stays 12 mag until January, and it is observable in excellent condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 5 22.03 13 6.5 0.444 1.342 136 12.8 21:12 ( 0, 68) Jan. 30 5 37.16 16 47.5 0.479 1.363 134 13.1 20:59 ( 0, 72) 10P/Tempel 2 It will brighten up to 11.5 mag in spring. However, the condition is very bad in this apparition. It will appear in the morning low sky in March 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) Jan. 23 19 0.65 -19 24.0 2.445 1.547 18 13.2 5:36 (292, -2) Jan. 30 19 24.00 -19 14.7 2.403 1.519 20 12.9 5:33 (292, -2) 29P/Schwassmann-Wachmann 1 Now it is 14.2 mag (Jan. 12, Toshihiko Ikemura, Hirohisa Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 2 17.14 23 55.4 5.650 5.852 96 13.5 18:47 ( 41, 76) Jan. 30 2 19.14 23 52.4 5.764 5.854 90 13.6 18:53 ( 60, 71) C/2019 L3 ( ATLAS ) Now it is 13.0 mag (Jan. 9, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 11 mag in winter in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2021 November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 0 34.00 54 33.6 4.601 4.731 91 13.9 18:47 (140, 58) Jan. 30 0 42.81 53 55.9 4.636 4.692 87 13.9 18:53 (136, 55) 323P/SOHO Five apparitions of this comet was confirmed in 1999, 2004, 2008, 2012 and 2016. It approaches to Sun down to 0.04 a.u. on Jan. 17. It may be observed on the ground in December and February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 21 0.99 -15 34.9 0.746 0.284 10 13.9 18:47 ( 77, -7) Jan. 30 22 12.64 -8 12.0 0.539 0.528 22 15.9 18:53 ( 77, 5) C/2017 K2 ( PanSTARRS ) Now it is 14.3 mag (Jan. 10, 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 is not observable now. 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) Jan. 23 18 5.81 35 9.5 7.655 7.267 63 14.0 5:36 (250, 38) Jan. 30 18 9.64 35 19.9 7.569 7.212 65 14.0 5:33 (251, 42) C/2019 F1 ( ATLAS-Africano ) It will brighten up to 13 mag from spring to summer. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until July in 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 16 55.10 -50 57.3 4.388 3.845 50 14.1 5:36 (332, -6) Jan. 30 17 7.11 -52 25.4 4.297 3.824 55 14.0 5:33 (335, -6) 246P/NEAT It stays 13-14 mag from 2020 to 2021. Appearing in the moring sky. It will be observable in good condition after this in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 17 23.59 -20 45.9 3.531 2.869 41 14.2 5:36 (308, 14) Jan. 30 17 35.06 -21 13.5 3.464 2.867 45 14.2 5:33 (311, 16) C/2017 T2 ( PanSTARRS ) It had been observed as 8-9 mag for a long time in 2020. Now it is fading. Appearing in the moring sky. It will be observable in good condition after this in the Southern Hemisphere. It locates extremely low after this in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 17 14.38 -29 17.8 4.246 3.593 43 14.7 5:36 (316, 9) Jan. 30 17 20.70 -30 13.3 4.230 3.659 48 14.8 5:33 (319, 11) C/2020 N1 ( PanSTARRS ) Now it is 15.3 mag (Jan. 8, Giuseppe Pappa). It stays 14-15 mag until spring. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it stays extremely low until spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 1 8.77 28 36.5 1.232 1.501 84 14.9 18:47 ( 82, 66) Jan. 30 1 30.47 27 6.0 1.229 1.456 81 14.8 18:53 ( 81, 63) C/2020 J1 ( SONEAR ) Now it is 14.9 mag (Oct. 10, Chris Wyatt). It will brighten up to 13.5 mag in spring. In the Southern Hemisphere, it stays observable in good condition for a long time, although it became unobservable temporarily in December. In the Northern Hemisphere, it is not observable until spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 17 49.02 -41 19.1 4.161 3.450 38 15.0 5:36 (319, -5) Jan. 30 17 50.52 -41 1.8 4.063 3.435 44 14.9 5:33 (322, -1) 17P/Holmes Now it is 15.8 mag (Nov. 5, Ken-ichi Kadota). It will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 21 56.17 -9 14.9 2.940 2.092 25 15.1 18:47 ( 74, 7) Jan. 30 22 10.29 -7 20.6 2.966 2.087 22 15.0 18:53 ( 78, 4) C/2020 F5 ( MASTER ) Now it is 14.8 mag (Dec. 12, Taras Prystavski). It stays 14-15 mag until the end of 2021. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes extremely low temporarily from January to February. In the Northern Hemisphere, it is not observable until June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 21 20.64 -52 2.0 5.129 4.355 34 15.2 18:47 ( 42,-24) Jan. 30 21 31.96 -50 45.3 5.129 4.349 34 15.2 18:53 ( 45,-26) C/2018 U1 ( Lemmon ) Now it is 15.9 mag (Nov. 10, 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, although it became unobservable temporarily in December. In the Southern Hemisphere, it is not observable until February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 18 10.87 3 45.8 6.168 5.445 39 15.3 5:36 (281, 21) Jan. 30 18 13.74 3 27.1 6.090 5.424 43 15.2 5:33 (285, 26) C/2019 T4 ( ATLAS ) Now it is 15.2 mag (Dec. 26, ATLAS-HKO, Haleakala). It is expected to brighten up to 13 mag in 2022. It is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it is observable from autumn to winter, but it locating extremely low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 8 16.87 -40 37.3 5.314 5.866 119 15.3 0:09 ( 0, 14) Jan. 30 8 13.49 -40 25.6 5.258 5.829 121 15.3 23:33 ( 0, 15) C/2020 T2 ( Palomar ) Now it is 15.9 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 13 mag from spring to summer, and it stays observable in good condition for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 13 36.46 26 46.6 2.373 2.839 108 15.8 5:27 ( 0, 82) Jan. 30 13 43.67 27 24.9 2.258 2.786 112 15.6 5:07 ( 0, 82) 409P/2020 V1 ( LONEOS-Hill ) First return of a new periodic comet which brightened up to 14-15 mag in 2006. Now it is 16.0 mag (Jan. 10, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15-16 mag from February to March, and will be observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 12 28.67 3 19.6 1.068 1.755 117 15.8 4:19 ( 0, 58) Jan. 30 12 40.37 4 28.0 1.019 1.754 122 15.6 4:04 ( 0, 59) C/2018 N2 ( ASASSN ) Now it is 14.7 mag (Jan. 14, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. In the Southern Hemisphere, it will never be observable again. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 16 35.47 61 35.6 4.973 5.113 92 15.7 5:36 (212, 52) Jan. 30 16 37.53 62 18.1 4.997 5.160 93 15.7 5:33 (209, 54) C/2019 T2 ( Lemmon ) Now it is 16.3 mag (Nov. 9, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 14.5 mag from spring to summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time, although it becomes extremely low temporarily from January to February. In the Northern Hemisphere, it is not observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 21 51.18 -36 25.8 3.658 2.808 26 15.7 18:47 ( 53,-11) Jan. 30 21 58.62 -37 6.3 3.650 2.784 24 15.7 18:53 ( 55,-15) 28P/Neujmin 1 Now it is 17.4 mag (Sept. 16, Blue Mountains Observatory, Leura). It will brighten up to 15.5 mag in early 2021. It stays unobservable until June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 20 30.54 -25 15.6 2.654 1.679 6 15.8 18:47 ( 72,-19) Jan. 30 20 52.10 -23 23.7 2.630 1.653 5 15.7 18:53 ( 75,-21) 277P/LINEAR It brightened rapidly and became brighter than expected. Now it is 15.7 mag (Jan. 11, Sandor Szabo). It is observable in good condition in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 3 6.11 24 25.4 1.370 1.916 107 16.2 18:56 ( 0, 79) Jan. 30 3 18.16 23 38.1 1.442 1.924 103 16.2 18:53 ( 14, 78) 117P/Helin-Roman-Alu 1 Now it is 16.8 mag (Jan. 10, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13 mag in 2022. In 2021, it is observable at 15-16 mag in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 13 40.15 -2 45.2 3.588 3.861 98 16.3 5:31 ( 0, 52) Jan. 30 13 42.62 -2 52.2 3.470 3.845 105 16.2 5:06 ( 0, 52) 11P/Tempel-Swift-LINEAR It brightened very rapidly up to 12.5 mag in early December (Dec. 7, Michael Jager). Now it is fading. It has already faded down to 16.7 mag (Jan. 15, Toshihiko Ikemura, Hirohisa Sato). It stays observable in excellent condition for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 3 15.58 6 23.6 0.938 1.525 105 16.3 19:05 ( 0, 61) Jan. 30 3 33.73 6 43.9 1.012 1.557 102 16.8 18:56 ( 0, 62) C/2019 K7 ( Smith ) Now it is 15.6 mag (Nov. 10, Toshihiko Ikemura, Hirohisa Sato). It stays 15-16 mag for a long time until 2021. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes very low temporarily from December to January. In the Southern Hemisphere, it will be observable in the extremely low sky only in next spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 19 3.51 24 59.7 5.413 4.815 48 16.3 5:36 (254, 22) Jan. 30 19 7.01 26 8.1 5.403 4.836 50 16.4 5:33 (256, 27) C/2019 T3 ( ATLAS ) Now it is 15.8 mag (Jan. 14, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16 mag from 2020 to 2021. In the Southern Hemisphere, it is not observable until summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 22 25.30 46 23.3 6.189 5.953 71 16.3 18:47 (125, 39) Jan. 30 22 29.50 45 32.0 6.263 5.951 67 16.3 18:53 (126, 34) P/2020 T3 ( PanSTARRS ) Brightening very rapidly. Now it is 16.5 mag, much brighter than expected (Jan. 2, D. Buczynski). It stays 16.5 mag until February. It is observable in excellent condition in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 1 50.92 11 12.4 1.103 1.437 86 16.4 18:47 ( 36, 62) Jan. 30 2 9.84 13 46.0 1.142 1.440 84 16.4 18:53 ( 46, 62) C/2021 A7 ( NEOWISE ) New comet. Now it is 16.5 mag (Jan. 14, M. Mattiazzo). It brightens up to 15 mag from spring to summer. In the Southern Hemisphere, it stays observable in good condition until June. In the Northern Hemisphere, it is observable in the low sky from March to May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 6 10.86 -65 7.1 2.631 2.838 91 16.6 21:57 ( 0,-10) Jan. 30 6 3.24 -63 13.7 2.555 2.783 92 16.5 21:23 ( 0, -8) P/2020 U2 ( PanSTARRS ) Brightened very rapidly. Now it is 15.9 mag (Jan. 10, Michael Jager). It stays observable at 16 mag in good condition for a while. It locates low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 3 2.89 26 39.6 1.315 1.866 107 16.6 18:52 ( 0, 82) Jan. 30 3 15.15 26 54.9 1.385 1.876 103 16.6 18:53 ( 24, 81) 162P/Siding Spring Now it is 16.1 mag (Jan. 9, Toshihiko Ikemura, Hirohisa Sato). It is bright as 14.7 mag visually (Jan. 11, Sandor Szabo). It will be fading after this, and will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition for a long time after this. In the Southern Hemisphere, it will be unobservable in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 0 36.53 21 58.7 1.273 1.393 74 16.6 18:47 ( 77, 57) Jan. 30 0 55.81 25 41.6 1.338 1.424 73 16.7 18:53 ( 86, 56) C/2019 O3 ( Palomar ) Now it is 16.6 mag (Nov. 9, Toshihiko Ikemura, Hirohisa Sato). It stays at 16-17 mag from 2020 to 2021. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 19 26.19 31 28.9 9.386 8.823 52 16.8 5:36 (246, 21) Jan. 30 19 29.16 32 2.9 9.374 8.822 53 16.8 5:33 (247, 25) C/2020 M5 ( ATLAS ) Now it is 16.8 mag (Jan. 17, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable at 15 mag for a long time from spring to early 2022. In the Southern Hemisphere, it is not observable until the end of 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 19 51.86 45 14.4 3.933 3.630 65 16.9 5:36 (230, 23) Jan. 30 19 56.17 46 8.2 3.896 3.593 65 16.8 5:33 (231, 27) C/2021 A4 ( NEOWISE ) New comet. Now it is 18.1 mag (Jan. 13, Toshihiko Ikemura, Hirohisa Sato). It approaches to Earth down to 0.4 a.u. in February, and it brightens up to 15-16 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is not observable until mid February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 13 59.09 50 59.0 0.784 1.439 108 17.6 5:36 (188, 74) Jan. 30 13 12.32 60 4.7 0.611 1.378 117 16.8 4:38 (180, 65) C/2019 C1 ( ATLAS ) It brightened up to 16.1 mag in last winter (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). Now it is 17.6 mag (Jan. 17, Toshihiko Ikemura, Hirohisa Sato). In 2021, it stays observable at 17 mag in good condition until summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 13 12.95 -20 28.8 6.600 6.809 98 16.9 5:04 ( 0, 34) Jan. 30 13 14.02 -20 27.4 6.502 6.821 104 16.9 4:38 ( 0, 34) 7P/Pons-Winnecke Now it is 19.1 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 11 mag from May to August. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it stays observable in good condition for a while. But it becomes extremely low after July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 14 50.49 10 21.9 1.668 1.885 86 17.3 5:36 (325, 61) Jan. 30 15 6.86 10 8.1 1.560 1.832 89 17.0 5:33 (329, 62) C/2017 B3 ( LINEAR ) It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, 2019, Chris Wyatt). Now it is fading slowly. It has already faded down to 17.2 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 23 50.84 5 48.3 7.525 7.045 57 17.1 18:47 ( 67, 38) Jan. 30 23 53.37 6 18.7 7.662 7.088 51 17.1 18:53 ( 74, 32) C/2020 H6 ( ATLAS ) Now it is 17.2 mag (Jan. 5, ATLAS-MLO, Mauna Loa). It stays observable at 16-17 mag from 2021 to 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 14 25.29 -26 51.0 5.175 5.103 80 17.1 5:36 (350, 27) Jan. 30 14 27.42 -26 26.8 5.038 5.083 87 17.1 5:33 (355, 28) C/2020 Y2 ( ATLAS ) Now it is 16.8 mag (Jan. 15, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 13 mag in 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays observable until June when it brightens up to 16 mag. But it will not be observable at the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 14 11.04 -16 15.3 5.562 5.595 86 17.2 5:36 (352, 38) Jan. 30 14 10.10 -16 50.4 5.391 5.547 93 17.1 5:33 ( 0, 38) C/2017 Y2 ( PanSTARRS ) Now it is 16.6 mag (Sept. 19, D. Buczynski). It is 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) Jan. 23 17 47.77 -9 17.4 5.407 4.675 38 17.2 5:36 (295, 18) Jan. 30 17 49.53 -9 43.0 5.336 4.683 44 17.2 5:33 (300, 22) C/2018 F4 ( PanSTARRS ) It brightened up to 13.5 mag in last winter (Dec. 6, 2019, Chris Wyatt). Now it is fading slowly. Now it is 17.2 mag (Jan. 4, Catalina Sky Survey). In the Southern Hemisphere, it stays observable for a long time. It locates somewhat low in the Northern Hemisphere. Taras Prystavski found its fragmentation on Sept. 12. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 1 14.13 -20 6.6 5.338 5.058 68 17.2 18:47 ( 28, 30) Jan. 30 1 15.54 -18 44.9 5.477 5.101 62 17.3 18:53 ( 37, 27) 402P/2020 Q3 ( LINEAR ) First return of a new periodic comet which brightened up to 16 mag from 2003 to 2004. Now it is 16.8 mag (Jan. 13, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in next winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 2 36.16 -17 20.8 4.269 4.343 87 17.3 18:47 ( 7, 38) Jan. 30 2 38.70 -16 15.0 4.343 4.327 82 17.3 18:53 ( 16, 37) 405P/2020 U1 ( Lemmon ) First return of a new periodic comet which brightened up to 17 mag in 2013. Now it is 17.8 mag (Jan. 13, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in late February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 13 38.07 4 15.1 0.501 1.190 101 17.3 5:29 ( 0, 59) Jan. 30 13 46.13 1 19.0 0.509 1.224 105 17.5 5:09 ( 0, 56) C/2020 O2 ( Amaral ) Now it is 17.7 mag (Sept. 14, Slooh.com Chile Observatory, La Dehesa). It will brighten up to 16.5 mag in summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 17 7.31 -37 11.4 5.790 5.148 45 17.4 5:36 (322, 4) Jan. 30 17 12.89 -36 47.9 5.692 5.131 51 17.4 5:33 (325, 6) C/2020 R7 ( ATLAS ) Now it is 17.9 mag (Dec. 28, J. L. Virlichie, P. Traverse). It is expected to brighten up to 12 mag in 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it locates extremely low until mid February, then it becomes unobservable until 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 2 48.85 -48 19.0 6.318 6.223 80 17.4 18:47 ( 2, 7) Jan. 30 2 45.89 -47 41.5 6.332 6.174 76 17.4 18:53 ( 8, 7) 84P/Giclas Now it is 16.9 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition. But it will be fading after this, and will be fainter than 18 mag in February. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 8 9.11 22 50.4 1.650 2.632 175 17.4 0:01 ( 0, 78) Jan. 30 8 2.57 23 26.5 1.700 2.671 167 17.6 23:23 ( 0, 78) A/2019 U5 Now it is 17.5 mag (Jan. 15, Toshihiko Ikemura, Hirohisa Sato). Although it is an asteroid, it is brightening rapidly. It may brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable now. It will appear in mid March, but it stays extremely low after that. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 18 26.56 37 22.2 7.902 7.506 62 17.6 5:36 (245, 35) Jan. 30 18 28.97 37 45.1 7.830 7.461 64 17.6 5:33 (247, 39) 178P/Hug-Bell Now it is 17.3 mag (Jan. 9, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a while, but it will be fading after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 7 18.47 25 43.8 1.486 2.448 164 17.6 23:06 ( 0, 81) Jan. 30 7 13.46 26 21.5 1.549 2.481 156 17.7 22:34 ( 0, 81) C/2020 Y3 ( ATLAS ) New comet. Now it is 17.5 mag (Jan. 17, Toshihiko Ikemura, Hirohisa Sato). It stays 17.5 mag and observable in good condition until March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 14 39.32 -8 44.1 1.970 2.088 82 17.7 5:36 (341, 44) Jan. 30 14 45.96 -5 12.2 1.882 2.114 89 17.6 5:33 (346, 49) 173P/Mueller 5 Now it is 17.0 mag (Jan. 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17-18 mag for a long time from late 2019 to early 2021. It will fade out before it passes the perihelion. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 5 22.13 19 16.9 3.656 4.437 137 17.6 21:10 ( 0, 74) Jan. 30 5 20.21 19 35.9 3.725 4.428 130 17.7 20:41 ( 0, 75) 99P/Kowal 1 Now it is 18.7 mag (Jan. 10, Toshihiko Ikemura, Hirohisa Sato). It stays 17-18 mag for a long time from 2021 to 2023. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 11 10.91 9 35.1 4.215 4.988 137 17.8 3:02 ( 0, 64) Jan. 30 11 9.07 9 48.5 4.138 4.980 145 17.7 2:33 ( 0, 65) A/2020 F7 Now it is 17.5 mag (Jan. 4, ATLAS-HKO, Haleakala). Although it is an asteroid, it is brightening rapidly. It stays 17-18 mag for a long time from 2021 to 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is observable only until May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 9 21.73 -4 55.4 4.876 5.759 151 17.8 1:14 ( 0, 50) Jan. 30 9 15.12 -5 23.0 4.826 5.740 156 17.8 0:40 ( 0, 50) C/2020 P3 ( ATLAS ) Now it is 17.6 mag (Jan. 2, D. Buczynski). It stays 18 mag until 2022. It stays 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) Jan. 23 0 29.58 80 0.5 6.522 6.837 104 17.9 18:47 (172, 43) Jan. 30 0 37.79 79 41.2 6.561 6.833 101 17.9 18:53 (171, 42) C/2019 E3 ( ATLAS ) It stays 17-18 mag for a long time until 2026. In the Southern Hemisphere, it stays sobservable in good condition for a long time. It is not observable in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 9 43.93 -56 35.9 11.416 11.659 101 18.0 1:35 ( 0, -2) Jan. 30 9 39.10 -56 55.3 11.354 11.642 104 17.9 1:03 ( 0, -2) C/2020 P1 ( NEOWISE ) It approached to Sun down to 0.34 a.u. on Oct. 20. Then the nucleus was disintegrated. After the perihelion passage, it was observed at 12.5 mag (Oct. 28, Michael Jager). It must have already disappeared. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 15 51.08 6 19.4 2.090 2.002 71 18.6 5:36 (307, 49) Jan. 30 15 53.18 6 46.7 2.098 2.110 77 18.9 5:33 (314, 53) C/2020 F3 ( NEOWISE ) It approached to Sun down to 0.29 a.u. on July 3, and it brightened up to 0.6 mag (Alan Hale). It had been fainter than 15.0 mag in October (Oct. 12, Mitsunori Tsumura). Appearing in the morning sky. But it is fainter than 19.0 mag (Jan. 14, Mitsunori Tsumura). It must be already extremely faint. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 23 16 37.40 -24 39.4 4.054 3.529 51 20.3 5:36 (319, 18) Jan. 30 16 39.40 -25 5.2 4.035 3.615 58 20.4 5:33 (324, 20)