Weekly Information about Bright Comets (2020 Sept. 5: South)

Japanese version Home page	Updated on September 6, 2020
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

88P/Howell Now it is 9.6 mag (Aug. 24, Chris Wyatt). It stays bright as 8-9 mag until autumn. It will be observable in excellent condition in the Southern Hemisphere. It locates very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 15 16.19 -21 3.1 1.348 1.374 69 9.1 19:07 ( 99, 51) Sept.12 15 38.75 -22 38.4 1.363 1.363 68 9.0 19:12 ( 95, 49) 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). Now it is fading. It has already faded down to 9.8 mag (Aug. 28, Osamu Miyazaki). It stays observable in the evening sky until early October when it fades down to 12 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 14 30.99 -4 45.7 1.841 1.507 54 9.8 19:07 (108, 32) Sept.12 14 41.18 -7 18.2 2.058 1.629 51 10.4 19:12 (102, 29) C/2020 K8 ( Catalina-ATLAS ) Now it is 14.2 mag (Aug. 18, Alan Hale). Small comet. But it approaches to Sun down to 0.47 a.u. in September, and it was expected to brighten up to 11 mag. But actually, it is much fainter than this ephemeris recently. It will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 8 48.64 4 55.5 0.866 0.530 31 10.9 4:49 (257, 9) Sept.12 9 33.54 0 43.6 1.035 0.479 27 10.9 4:40 (265, 6) C/2017 T2 ( PanSTARRS ) Now it is 11.8 mag (Aug. 24, Chris Wyatt). It stays observable in the evening sky until September when it fades down to 12 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 14 18.23 1 48.6 2.780 2.279 50 11.1 19:07 (112, 26) Sept.12 14 27.98 -0 56.9 2.908 2.340 46 11.3 19:12 (105, 23) C/2020 M3 ( ATLAS ) It brightened rapidly. Now it is very bright as 11.4 mag (Aug. 28, Michael Mattiazzo). It will brighten up to 9-10 mag from October to November, and will be observable in excellent condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 3 11.35 -36 23.0 0.726 1.470 114 11.5 4:14 ( 0, 89) Sept.12 3 31.46 -35 59.7 0.671 1.422 114 11.2 4:06 ( 0, 89) C/2019 U6 ( Lemmon ) It brightened up to 6.0 mag in June (June 13, Marco Goiato). Now it is fading. It has already faded down to 10.9 mag (Aug. 28, Osamu Miyazaki). 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. 5 15 21.44 22 36.2 1.731 1.603 65 13.0 19:07 (140, 21) Sept.12 15 39.68 22 50.3 1.849 1.692 65 13.5 19:12 (137, 18) C/2020 Q1 ( Borisov ) Bright new comet. Now it is 14.0 mag (Aug. 25, Michael Jager). It is very bright as 11.6 mag visually (Aug. 25, Juan Jose Gonzalez). It approaches to Earth down to 0.7 a.u. in September, and it will brighten up to 13 mag. It stays observable in excellent condition in the Northern Hemipshere. In the Southern Hemipshere, it is not obserbvable at the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 5 2.49 45 57.1 1.016 1.354 83 13.4 4:49 (193, 7) Sept.12 4 22.66 55 37.8 0.868 1.381 94 13.1 4:40 (183, -1) 29P/Schwassmann-Wachmann 1 Outburst occured on July 27. It is bright as 13.0 mag still now (Aug. 24, Chris Wyatt). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 2 53.31 27 13.2 5.349 5.822 113 13.4 3:57 (180, 28) Sept.12 2 52.77 27 23.1 5.254 5.824 120 13.3 3:29 (180, 28) C/2019 N1 ( ATLAS ) Now it is 14.0 mag (Aug. 20, Sandor Szabo). It is expected to brighten up to 12 mag from autumn to winter. It will be unobservable soon also in the Northern Hemisphere. In the Southern Hemisphere, it will appear in the morning sky in December, then it stays observable in good condition. In the Northern Hemisphere, it will be observable in the extremely low sky only from November to December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 12 35.46 22 17.3 2.878 2.049 28 13.5 19:07 (112, -7) Sept.12 12 41.44 18 53.1 2.873 2.002 24 13.4 19:12 (106,-10) C/2020 P1 ( NEOWISE ) Now it is 15.3 mag (Aug. 16, M. Mattiazzo). Although it is a tiny comet, it will approach to Sun down to 0.34 a.u. on Oct. 20, and it is expected to brighten up to 8.5 mag. In the Southern Hemisphere, it stays observable in good condition until late September when it brightens up to 11.5 mag. In the Northern Hemisphere, it stays unobservable for a while. But it will appear in the morning sky at 10 mag in late October. Then it stasy observable while the comet will be fading rapidly. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 12 26.17 -59 55.7 1.017 1.149 69 14.6 19:07 ( 36, 32) Sept.12 12 28.18 -56 22.2 0.957 1.014 62 14.0 19:12 ( 39, 27) 58P/Jackson-Neujmin Recovered from SWAN images after 24-year blank. It brightened up to 10.2 mag in spring (May 31, Marco Goiato). Now it is fading. It has already faded down to 15.2 mag (Aug. 21, Sandor Szabo). It stays observable for a long time after this until the comet fades out. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 6 26.52 11 12.4 1.941 1.796 66 14.1 4:49 (227, 30) Sept.12 6 38.94 10 33.9 1.926 1.845 70 14.4 4:40 (226, 32) 246P/NEAT Now it is 14.2 mag (July 16, Paul Camilleri). It stays 13-14 mag from 2020 to 2021. It will be unobservable in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 13 44.54 -1 31.8 3.666 3.007 42 14.4 19:07 (103, 21) Sept.12 13 53.51 -2 48.6 3.714 2.996 38 14.4 19:12 ( 98, 17) C/2018 N2 ( ASASSN ) Now it is 14.0 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). It stays 14 mag until autumn. In the Southern Hemisphere, it will never be observable again. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 13 36.99 74 54.2 4.417 4.213 71 14.6 19:07 (164,-28) Sept.12 13 53.33 73 2.2 4.446 4.255 72 14.7 19:12 (161,-28) C/2017 K2 ( PanSTARRS ) Now it is 15.1 mag (Aug. 24, Katsumi Yoshimoto). 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 only visible in the extremely low sky in summer in 2020. 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) Sept. 5 17 4.39 46 10.1 8.337 8.337 86 14.8 19:07 (169, 8) Sept.12 17 4.29 45 13.2 8.328 8.285 84 14.8 19:12 (163, 7) C/2020 H4 ( Leonard ) It was expected to brighten very rapidly, and brighten up to 14.5 mag from August to September. However, its current brightness is very uncertain. It could not be detected as fainter than 18.0 mag on June 30 (Charles S. Morris), and fainter than 15.7 mag on July 13 (Sandor Szabo). However, Giuseppe Pappa reported as 14 mag on July 10, and Thomas Lehmann reported it is bright as 15.2 mag on July 12. In the Northern Hemisphere, it stays observable for a long time, although it becomes extremely low in early September. In the Southern Hemisphere, it is not observable until late October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 10 43.73 37 13.9 1.664 0.946 30 14.9 4:49 (244,-31) Sept.12 10 45.49 32 11.5 1.714 0.969 29 15.0 4:40 (247,-25) C/2019 F1 ( ATLAS-Africano ) Now it is 15.9 mag (Aug. 14, ATLAS-MLO, Mauna Loa). It will brighten up to 13 mag in 2021. In the Southern Hemisphere, it stays observable at 15 mag until October. 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) Sept. 5 14 6.58 -28 3.6 4.888 4.432 57 14.9 19:07 ( 80, 39) Sept.12 14 11.22 -28 52.4 4.936 4.397 52 14.9 19:12 ( 76, 34) 2P/Encke It passed the perihelion on June 25, and brightened up to 7.3 mag (June 30, Chris Wyatt). Now it is fading. It has already faded down to 14.3 mag (Aug. 20, Ken-ichi Kadota). In the Southern Hemisphere, it stays observable in good condition in the evening sky while the comet will be fading. It locates very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 16 20.10 -31 49.8 1.093 1.435 86 15.0 19:07 ( 91, 68) Sept.12 16 48.76 -31 38.6 1.236 1.530 85 15.7 19:12 ( 91, 67) C/2020 P4 ( SOHO ) New comet discovered in the images of SOHO spacecraft. It approached to Sun down to 0.09 a.u. on Aug. 8, and it brightened up to 3 mag. It will appear in the morning sky in October. But it must be fainter than 18 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 10 3.09 3 27.8 1.879 0.929 13 15.1 4:49 (270, -5) Sept.12 10 16.72 1 58.2 2.021 1.092 16 15.9 4:40 (270, -4) C/2019 L3 ( ATLAS ) Now it is 14.9 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 12 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) Sept. 5 0 49.10 64 27.4 5.205 5.562 105 15.2 1:53 (180,-10) Sept.12 0 44.75 65 1.0 5.107 5.519 109 15.2 1:21 (180,-10) C/2020 F5 ( MASTER ) Now it is 14.5 mag (Aug. 18, T. Prystavski). It stays 14-15 mag until 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until June in 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 16 9.74 -75 29.2 4.453 4.630 93 15.2 19:07 ( 10, 47) Sept.12 16 27.29 -74 34.4 4.490 4.610 90 15.2 19:12 ( 12, 47) C/2020 J1 ( SONEAR ) Now it is 14.5 mag (Aug. 18, T. Prystavski). It will brighten up to 13.5 mag in spring in 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until spring in 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 17 45.44 -60 19.2 3.616 3.951 102 15.3 19:07 ( 6, 65) Sept.12 17 34.16 -58 34.7 3.696 3.918 95 15.3 19:12 ( 20, 64) 84P/Giclas Now it is 15.5 mag (Aug. 18, Giuseppe Pappa). It stays 15.5 mag from summer to winter, and 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) Sept. 5 6 56.34 19 21.0 2.229 1.922 59 15.5 4:49 (227, 19) Sept.12 7 10.82 19 10.2 2.195 1.951 62 15.4 4:40 (227, 20) C/2018 F4 ( PanSTARRS ) It brightened up to 13.5 mag in winter (Dec. 6, Chris Wyatt). Now it is fading slowly. Now it is 15.3 mag (Aug. 30, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it is appearing in the morning sky, but it stays low for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 3 8.52 -37 17.5 3.727 4.258 115 15.6 4:12 ( 0, 88) Sept.12 3 1.94 -37 39.2 3.706 4.295 119 15.6 3:38 ( 0, 87) C/2019 K7 ( Smith ) Now it is 15.3 mag (Aug. 20, Sandor Szabo). It stays 15-16 mag for a long time until 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 18 40.73 20 7.1 4.050 4.522 111 15.6 19:41 (180, 35) Sept.12 18 35.74 19 57.7 4.149 4.531 105 15.7 19:12 (179, 35) C/2020 F8 ( SWAN ) It brightened up to 4.7 mag in early May (May 2, Marco Goiato). However, it has faded and got diffused after that. It had already faded down to 7.3 mag in late May (May 21, Mitsunori Tsumura). It is appearing in the morning sky. However, maybe it has already disappeared. It stays observable in good condition after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 6 46.45 11 57.9 2.310 2.034 61 15.6 4:49 (231, 27) Sept.12 6 44.97 10 2.0 2.290 2.139 68 15.8 4:40 (228, 31) 115P/Maury Now it is 15.9 mag (Aug. 11, Toshihiko Ikemura, Hirohisa Sato). It stays observable until December when it becomes fainter than 18 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 19 18.89 -9 19.8 1.320 2.082 126 15.9 20:20 (180, 64) Sept.12 19 24.82 -10 19.8 1.386 2.092 121 16.0 19:58 (180, 65) C/2017 U7 ( PanSTARRS ) Now it is 16.2 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). It is observable at 15-16 mag in 2020. It is observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 18 8.03 -26 18.1 6.463 6.860 109 16.0 19:09 (180, 81) Sept.12 18 5.00 -25 55.5 6.601 6.877 101 16.1 19:12 (139, 78) C/2019 T2 ( Lemmon ) Now it is 16.0 mag (Aug. 20, Sandor Szabo). It will brighten up to 14.5 mag from spring to summer in 2021. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is observable in good condition in 2020, however, it will be unobservable in 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 22 19.35 -9 0.9 2.543 3.542 170 16.1 23:18 (180, 64) Sept.12 22 9.12 -11 44.9 2.531 3.497 160 16.0 22:41 (180, 67) C/2018 U1 ( Lemmon ) Now it is 15.3 mag (Aug. 20, Sandor Szabo). It will stay at 15 mag for a long time from 2021 to 2022. In the Northern Hemisphere, it stays observable in good condition while brightening gradually. In the Southern Hemisphere, it stays locating low for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 17 30.90 22 7.9 5.756 5.938 95 16.0 19:07 (170, 32) Sept.12 17 29.21 20 43.1 5.817 5.910 90 16.0 19:12 (160, 32) 162P/Siding Spring Now it is 15.8 mag (Aug. 16, M. Mattiazzo). It brightens up to 16 mag from summer to winter. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is not observable until late October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 20 59.25 -68 42.7 0.953 1.656 115 16.1 21:59 ( 0, 56) Sept.12 20 49.48 -66 45.1 0.935 1.612 112 16.0 21:22 ( 0, 58) 304P/Ory Now it is 15.6 mag (Aug. 24, Katsumi Yoshimoto). It stays 16 mag until late September. It is observable in good condition in the Northern Hemisphere. It locates low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 6 39.52 22 56.7 1.370 1.289 63 16.2 4:49 (222, 19) Sept.12 7 3.22 22 42.6 1.368 1.309 64 16.2 4:40 (223, 18) 17P/Holmes Now it is 17.2 mag (Aug. 17, P. Camilleri, H. Williams). It brightens up to 15 mag in winter. But it is not observable at high light. In the Southern Hemisphere, it stays observable in good condition until autumn when the comet will brighten up to 16 mag. It stays locating very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 17 59.15 -36 49.6 1.945 2.435 106 16.5 19:07 ( 38, 88) Sept.12 18 4.70 -35 37.5 2.001 2.409 101 16.4 19:12 ( 83, 83) 257P/Catalina Now it is 16.6 mag (Aug. 24, ATLAS-MLO, Mauna Loa). It stays 16.5 mag until October, and observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 20 12.62 11 42.9 1.305 2.143 135 16.4 21:13 (180, 43) Sept.12 20 14.35 10 7.4 1.340 2.142 131 16.4 20:47 (180, 45) C/2019 T4 ( ATLAS ) Now it is 15.9 mag (Apr. 24, J. Drummond). It is expected to brighten up to 13 mag in 2022. In 2020, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it is not observable. It will be observable from autumn to winter, but it locating extremely low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 7 57.50 -28 20.8 7.153 6.635 55 16.5 4:49 (281, 37) Sept.12 8 2.42 -28 57.9 7.072 6.595 58 16.4 4:40 (281, 40) C/2017 B3 ( LINEAR ) It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, Chris Wyatt). Now it is fading slowly. Now it is 15.6 mag (Aug. 20, Sandor Szabo). In 2020, it stays observable in good condition while the comet will be fading from 16 to 17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 0 20.87 1 36.0 5.259 6.200 157 16.5 1:25 (180, 53) Sept.12 0 16.75 1 40.5 5.265 6.242 164 16.5 0:53 (180, 53) 156P/Russell-LINEAR Now it is 16.7 mag (Aug. 30, ATLAS-MLO, Mauna Loa). It is expected to brighten up to 16 mag from October to November, and it will be observable in excellent condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 0 12.48 -37 57.3 0.643 1.576 144 16.8 1:16 ( 0, 87) Sept.12 0 7.45 -37 46.1 0.601 1.537 144 16.6 0:44 ( 0, 87) C/2019 T3 ( ATLAS ) Now it is 16.8 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16.5-17 mag from 2020 to 2021. In the Southern Hemisphere, it is not observable until summer in 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 0 18.33 74 41.7 5.863 6.078 97 16.7 1:23 (180,-20) Sept.12 23 56.54 74 21.6 5.791 6.068 101 16.7 0:34 (180,-19) C/2017 Y2 ( PanSTARRS ) Now it is 16.0 mag (Aug. 20, Sandor Szabo). 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) Sept. 5 17 24.25 9 9.7 4.445 4.657 95 16.8 19:07 (165, 45) Sept.12 17 21.00 7 38.4 4.552 4.652 89 16.8 19:12 (153, 44) (6478) Gault Now it is 17.5 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). Main-belt asteroid. But it showed a straight tail like a comet in 2019. In 2020, it brightens up to 16.5 mag and stays observable in good condition from September to October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 0 35.32 7 40.0 1.293 2.230 151 17.0 1:39 (180, 47) Sept.12 0 30.80 5 44.7 1.273 2.246 159 16.9 1:07 (180, 49) C/2018 A6 ( Gibbs ) It brightened up to 13.2 mag from spring to autumn in 2019 (June 30, Thomas Lehmann). Now it is fading slowly. It has already faded down to 16.3 mag (Aug. 30, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it stays low for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 23 1.54 -30 36.0 3.686 4.627 156 17.0 0:06 (180, 86) Sept.12 22 52.96 -30 13.3 3.747 4.667 153 17.1 23:25 (180, 85) C/2019 O3 ( Palomar ) Now it is 16.6 mag (Aug. 15, Charles S. Morris). It stays at 17 mag from 2020 to 2021. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 19 2.21 31 45.2 8.452 8.884 112 17.1 20:02 (180, 23) Sept.12 18 59.96 31 31.0 8.508 8.879 108 17.1 19:33 (180, 23) P/2020 M2 ( Lemmon ) First return of a new periodic comet which brightened up to 17.5 mag in 2012. Now it is 17.5 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag in good condition from summer to winter. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 4 44.83 30 7.1 2.135 2.345 88 17.2 4:49 (194, 23) Sept.12 4 53.58 31 1.2 2.068 2.357 93 17.2 4:40 (192, 23) 278P/McNaught Now it is 16.9 mag (Aug. 8, ATLAS-HKO, Haleakala). It became brighter than orignally predicted. It stays observable at 17 mag in good condition until autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 14 44.42 -21 1.4 2.350 2.088 62 17.4 19:07 ( 94, 44) Sept.12 14 59.17 -22 6.0 2.411 2.087 59 17.5 19:12 ( 90, 41) C/2016 M1 ( PanSTARRS ) It brightened up to 7.7 mag in June in 2018 (June 19, Juan Jose Gonzalez). Now it is fading. It has already faded down to 16.9 mag (Apr. 22, J. Drummond). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out. It will be observable in good condition after this also in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 6 37.90 -10 51.1 7.881 7.537 66 17.5 4:49 (249, 44) Sept.12 6 39.01 -11 5.2 7.843 7.589 71 17.5 4:40 (245, 48) 312P/NEAT Now it is 18.5 mag (Aug. 27, ATLAS-MLO, Mauna Loa). It will brighten up to 17.5 mag in September. 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. 5 23 17.34 -18 31.6 0.994 1.990 167 17.5 0:21 (180, 73) Sept.12 23 15.31 -20 41.6 1.000 1.986 163 17.5 23:47 (180, 76) 254P/McNaught Now it is 17.3 mag (Aug. 16, W. Hasubick). It stays 17.5 mag until November. It is observable in excellent condition in the Southern Hemisphere. It locates very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 23 20.76 -32 22.4 2.204 3.140 153 17.5 0:25 (180, 87) Sept.12 23 16.82 -33 35.4 2.223 3.138 150 17.5 23:49 (180, 89) 28P/Neujmin 1 Now it is 16.9 mag (Aug. 24, P. Camilleri, H. Williams). It will brighten up to 15.5 mag in early 2021. In 2020, it stays observable at 17 mag until November in the Southern Hemisphere. In the Northern Hemisphere, it will be unobservable soon. Then it stays unobservable until 2021 June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 14 43.27 -29 22.4 2.879 2.626 65 17.6 19:07 ( 83, 47) Sept.12 14 53.28 -29 42.7 2.902 2.570 61 17.6 19:12 ( 80, 43) 215P/NEAT Now it is 17.7 mag (Aug. 15, Toshihiko Ikemura, Hirohisa Sato). It was observed at 17 mag in 2019. In 2020, it is observable at 17.5 mag in good condition from summer to autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 0 56.97 -6 8.0 2.851 3.757 149 17.6 2:01 (180, 61) Sept.12 0 53.56 -6 30.1 2.818 3.764 156 17.6 1:30 (180, 61) 173P/Mueller 5 Now it is 18.6 mag (Aug. 24, ATLAS-MLO, Mauna Loa). 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) Sept. 5 5 47.00 16 16.6 4.782 4.640 75 17.7 4:49 (214, 31) Sept.12 5 51.06 16 19.5 4.667 4.629 81 17.7 4:40 (211, 33) P/2002 T5 ( LINEAR ) First return of a new periodic comet which brightened up to 16 mag from 2003 to 2004. Now it is 18.6 mag (Aug. 17, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in winter between 2021 and 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 3 10.47 -19 4.6 4.156 4.702 117 17.8 4:13 (180, 74) Sept.12 3 10.90 -19 48.8 4.071 4.682 121 17.8 3:46 (180, 75) C/2019 E3 ( ATLAS ) It stays observable at 17 mag for a long time until 2027. In the Southern Hemipshere, it stays observable in good condition for a long time. It is not observable in the Northern Hemipsphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 9 53.92 -44 31.0 12.590 12.014 53 17.8 4:49 (310, 23) Sept.12 9 56.14 -44 57.2 12.579 11.995 52 17.8 4:40 (309, 25) P/2019 LD2 ( ATLAS ) Now it is 17.3 mag (Aug. 13, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag from 2019 to 2020. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 20 52.48 -7 50.3 3.702 4.599 149 17.8 21:53 (180, 63) Sept.12 20 50.39 -8 17.1 3.763 4.601 142 17.8 21:23 (180, 63) C/2020 O2 ( Amaral ) Now it is 18.0 mag (Aug. 5, L. S. Amaral). It will brighten up to 16.5 mag in 2021 summer. In the Southern Hemisphere, it stays observable for a while. In the Northern Hemisphere, it is not observable until 2021 February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 14 47.44 -46 44.5 5.795 5.602 74 17.8 19:07 ( 57, 51) Sept.12 14 53.40 -45 54.9 5.865 5.577 68 17.8 19:12 ( 58, 47) C/2017 K5 ( PanSTARRS ) Sam Deen pointed out that it brightened in outburst twice in 2017 and 2019. It was observed at 20-21 mag in 2017. Then it became fainter than 22.9 mag in 2018 summer (Aug. 29, Sam Deen). However, it brightened up to 17.2 mag in 2019 spring (Mar. 25, B. T. Bolin). Then it faded again down to 19.9 mag (May 29, Toshihiko Ikemura, Hirohisa Sato). Now it is 18.1 mag (July 9, J. Jahn). It is predicted to stay observable at 18 mag for a long time from 2019 to 2021. But actually, it may be fainter than this ephemeris. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 18 26.01 -26 1.6 7.294 7.747 113 17.8 19:27 (180, 81) Sept.12 18 25.04 -26 27.8 7.412 7.753 106 17.9 19:12 (159, 81) 277P/LINEAR Now it is 20.3 mag (Aug. 21, J. Nicolas, F. Kugel). It is expected to brighten up to 16 mag from autumn to winter. 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) Sept. 5 2 20.40 38 41.0 1.533 2.154 114 18.1 3:24 (180, 16) Sept.12 2 25.64 39 54.7 1.450 2.128 118 17.9 3:01 (180, 15) 178P/Hug-Bell Now it is 17.7 mag (Aug. 17, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17.5-18 mag in good condition until winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept. 5 6 14.99 16 47.9 2.045 1.931 69 17.9 4:49 (221, 27) Sept.12 6 29.12 16 54.6 1.995 1.946 72 17.9 4:40 (220, 28)