Weekly Information about Bright Comets (2019 Aug. 24: North)

Japanese version Home page	Updated on August 25, 2019
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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.

322P/SOHO It will pass only 0.05 a.u. from Sun on Aug. 31, then it will brighten up to 5.5 mag. It is not observable on the ground. But it will be visible in the SOHO spacecraft's images. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 11 19.77 -0 46.7 0.889 0.371 21 14.3 20:08 ( 98,-12) Aug. 31 10 30.85 9 22.7 0.949 0.064 1 6.9 4:03 (245,-18) C/2018 W2 ( Africano ) Now it is bright as 10.1 mag (Aug. 25, Carl Hergenrother). It is expected to brighten up to 8 mag in autumn. In the Northern Hemisphere, it stays observable for a long time while the comet is brightening. In the Southern Hemisphere, it it not observable until mid September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 3 47.60 57 1.8 1.183 1.466 83 9.7 3:56 (211, 62) Aug. 31 3 20.77 55 27.8 1.000 1.457 92 9.3 4:03 (197, 68) C/2018 N2 ( ASASSN ) Now it is 12.0 mag (Aug. 9, Maik Meyer). It will brighten up to 10.5 mag and it will be observable in good condition from autumn to winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 2 38.86 21 14.3 2.784 3.217 106 11.3 3:56 (327, 74) Aug. 31 2 34.60 23 12.7 2.666 3.202 113 11.2 4:01 ( 0, 78) 168P/Hergenrother It has not been observed yet in this apparition. Now it is fainter than 21.5 mag (Aug. 4, Erwin Schwab). It was expected to brighten up to 12 mag from August to September. But actually, it must be much fainter than expected. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 4 27.99 34 47.3 1.130 1.376 79 12.0 3:56 (260, 60) Aug. 31 4 50.52 37 53.0 1.118 1.391 81 11.9 4:03 (254, 63) 260P/McNaught Now it is 12.7 mag (Aug. 12, Piotr Guzik). It will brighten up to 11.5 mag in autumn. In the Northern Hemisphere, it will be observable in excellent condition. In the Southern Hemisphere, it will be extremely low from autumn to winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 2 5.12 16 10.8 0.664 1.430 115 12.2 3:56 (358, 71) Aug. 31 2 16.95 20 29.6 0.632 1.421 118 12.0 3:43 ( 0, 75) C/2017 T2 ( PanSTARRS ) Now it is 13.6 mag (Aug. 6, Hirohisa Sato). It is expected to brighten up to 7 mag in 2020. It is a bit fainter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 5 13.71 21 40.0 3.712 3.516 71 12.4 3:56 (275, 46) Aug. 31 5 19.06 22 33.7 3.543 3.450 76 12.2 4:03 (278, 53) C/2019 A9 ( PanSTARRS ) It brightened rapidly. Now it is very bright as 12.7 mag (Aug. 5, Hidetaka Sato). It stays at 12.5 mag until September. In the Southern Hemisphere, it stays observable in the low sky until it becomes fainter than 18 mag in winter. It is not observable at all in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 8 41.30 -32 35.1 1.939 1.482 48 12.9 3:56 (293,-25) Aug. 31 9 5.12 -37 56.2 1.920 1.511 51 13.1 4:03 (300,-25) 29P/Schwassmann-Wachmann 1 Now it is 14.3 mag (Aug. 24, Christian Harder). Richard Miles reported that it brightened by 2 mag in outburst on Aug. 2. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 0 58.89 16 18.2 5.073 5.772 129 13.2 2:53 ( 0, 71) Aug. 31 0 57.13 16 19.9 4.996 5.773 136 13.2 2:23 ( 0, 71) 78P/Gehrels 2 Appearing in the morning sky. It is observable at 14 mag in good condition in autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 7 35.38 17 11.1 3.033 2.317 37 13.7 3:56 (259, 15) Aug. 31 7 48.48 16 28.7 3.007 2.344 41 13.8 4:03 (263, 19) 68P/Klemola Now it is 13.6 mag (Aug. 22, Steffen Fritsche). It is observable at 13.5 mag in good condition in autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 17 24.86 -8 38.9 1.364 1.956 110 13.9 20:08 ( 18, 45) Aug. 31 17 31.91 -9 41.7 1.398 1.930 105 13.9 19:57 ( 21, 43) C/2018 A6 ( Gibbs ) Now it is 13.8 mag (Aug. 8, Chris Wyatt). It stays 13-14 mag for a long time in 2019. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is not observasble until summer in 2020. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 8 48.19 -65 5.2 3.085 3.039 77 13.9 3:56 (329,-36) Aug. 31 8 59.56 -67 28.9 3.087 3.047 78 13.9 4:03 (333,-34) 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 14.8 mag (Aug. 8, Chris Wyatt). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out. In the Northern Hemisphere, it will appear in the morning sky in late September. But it stays low for a while after that. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 6 55.46 -29 6.1 4.960 4.571 61 14.3 3:56 (303, -4) Aug. 31 6 58.53 -29 26.2 4.969 4.628 64 14.3 4:03 (308, 1) C/2017 B3 ( LINEAR ) Now it is 14.4 mag (Aug. 8, Chris Wyatt). In the Southern Hemisphere, it is observable for a long time. It stays low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 23 57.08 -45 59.6 3.483 4.293 138 14.7 1:51 ( 0, 9) Aug. 31 23 48.94 -45 45.1 3.496 4.317 139 14.8 1:16 ( 0, 9) C/2018 R3 ( Lemmon ) It brightened rapidly up to 10 mag in June. Now it is not observable. It will appear in the morning sky in October. But it will be fainter than 18 mag at that time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 9 55.70 16 57.0 2.726 1.725 6 14.8 3:56 (239,-12) Aug. 31 10 4.96 13 54.2 2.782 1.791 8 15.3 4:03 (246, -9) C/2017 M4 ( ATLAS ) Now it is 14.6 mag (Aug. 5, Thomas Lehmann). It will be fading slowly after this. It is observable in excellent condition in the Southern Hemisphere. It will never be observable after this in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 13 34.09 -42 58.6 4.041 3.843 71 14.9 20:08 ( 45,-11) Aug. 31 13 35.12 -43 20.2 4.171 3.878 66 15.0 19:57 ( 46,-14) A/2018 V3 Peculiar asteroid moving along a cometary orbit. Now it is 15.9 mag (Aug. 11, Katsumi Yoshimoto). It approaches to Earth down to 0.37 a.u. in mid August. Then it brightens up to 15 mag and will be observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 19 31.89 -30 31.8 0.424 1.359 138 15.6 21:13 ( 0, 25) Aug. 31 17 53.22 -25 56.4 0.594 1.346 111 16.7 19:57 ( 11, 28) 261P/Larson Now it is 16.2 mag (Aug. 9, Charles Morris). It is observable at 16 mag in good condition from summer to autumn. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 3 18.85 25 55.7 1.712 2.079 96 15.9 3:56 (294, 71) Aug. 31 3 27.29 26 42.7 1.654 2.093 100 15.9 4:03 (304, 76) C/2018 F4 ( PanSTARRS ) Now it is 16.6 mag (May 10, Mount John Observatory, Lake Tekapo). It stays 16 mag for a long time from 2019 to 2020. It is observable in excellent condition in the Southern Hemisphere. It is hardly observable in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 11 11.97 -55 28.9 3.818 3.567 68 15.9 20:08 ( 43,-37) Aug. 31 11 17.39 -56 24.7 3.841 3.551 65 15.9 19:57 ( 42,-39) A/2017 U7 It looks cometary on the LCO (CTIO) image on Aug. 21. Now it is 15.9 mag (Aug. 8, ATLAS-MLO, Mauna Loa). It is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it locates extremely low for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 20 41.23 -43 6.7 5.583 6.419 142 16.0 22:31 ( 0, 12) Aug. 31 20 31.96 -42 54.7 5.646 6.418 136 16.0 21:54 ( 0, 12) C/2019 K5 ( Young ) Now it is 15.6 mag (Aug. 3, Chris Wyatt). It stays observable in good condition while the comet will be fading slowly after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 3 7.41 9 32.8 1.700 2.166 103 16.0 3:56 (326, 61) Aug. 31 3 15.49 8 50.6 1.663 2.195 107 16.0 4:03 (339, 62) 101P/Chernykh Now it is 17.7 mag (Aug. 23, Jost Jahn). It will brighten up to 15.5 mag and it will be observable in good condition in autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 0 5.47 -6 7.5 1.712 2.641 150 16.2 1:59 ( 0, 49) Aug. 31 0 3.84 -6 39.3 1.652 2.616 157 16.1 1:30 ( 0, 48) C/2019 K7 ( Smith ) Now it is 16.2 mag (Aug. 10, Ken-ichi Kadota). 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) Aug. 24 20 52.65 -33 35.7 4.164 5.077 151 16.2 22:42 ( 0, 22) Aug. 31 20 43.44 -32 57.6 4.192 5.051 144 16.1 22:06 ( 0, 22) C/2019 K1 ( ATLAS ) Now it is 16.5 mag (July 27, Kevin Hills). It will brighten up to 14 mag in winter. It stays observable for a long time in the Southern Hemisphere. In the Northern Hemisphere, it is not observable for a long time until August in 2020. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 14 54.57 -37 53.3 2.801 2.854 82 16.3 20:08 ( 38, 3) Aug. 31 14 53.07 -38 41.9 2.860 2.800 76 16.3 19:57 ( 40, 0) P/2008 Y1 ( Boattini ) First return of a new periodic comet which brightened up to 16.5 mag in 2009. It has not been recovered yet in this apparition. It will brighten up to 16 mag in autumn. 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) Aug. 24 5 59.44 27 46.6 1.439 1.288 60 16.4 3:56 (261, 40) Aug. 31 6 29.27 26 52.2 1.420 1.275 60 16.3 4:03 (263, 40) C/2018 Y1 ( Iwamoto ) It approached to Earth down to 0.3 a.u. in mid February, and brightened up to 5.5 mag (Feb. 13, Juan Jose Gonzalez). Now it is fading. It has already faded down to 16.6 mag (Aug. 2, Ken-ichi Kadota). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 4 28.01 41 21.3 2.985 2.964 79 16.5 3:56 (246, 61) Aug. 31 4 19.94 42 0.1 2.921 3.038 86 16.6 4:03 (243, 69) C/2016 N6 ( PanSTARRS ) Fading now. In the Southern Hemisphere, it stays observable for a long time until it fades out. In the Northern Hemisphere, it will not be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 6 41.86 -32 37.2 5.087 4.770 66 16.5 3:56 (308, -4) Aug. 31 6 43.76 -34 12.0 5.079 4.822 69 16.6 4:03 (313, 0) C/2017 K2 ( PanSTARRS ) Now it is 16.0 mag (Aug. 9, Charles Morris). 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 highlight from 2022 summer to 2023 summer. In the Southern Hemisphere, it stays unobservable for a while. But it will be observable in good condition at the highlight. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 17 8.50 54 37.0 10.977 11.007 89 16.6 20:08 (154, 67) Aug. 31 17 7.47 53 55.7 10.958 10.960 87 16.6 19:57 (148, 66) (3200) Phaethon It passed the perihelion on July 2. Then it must have brightened up to 13 mag, but it was not observable around that time. In the Northern Hemisphere, it stays observable in excellent condition until December when it becomes fainter than 18 mag. In the Southern Hemisphere, it stays locating low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 4 57.99 47 28.5 1.004 1.205 73 16.7 3:56 (235, 55) Aug. 31 4 48.70 49 11.4 0.994 1.302 81 16.7 4:03 (229, 62) C/2018 A3 ( ATLAS ) Now it is 16.8 mag (Aug. 2, Charles Morris). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it stays extremely low for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 4 11.27 49 43.2 3.908 3.881 81 16.8 3:56 (228, 62) Aug. 31 4 4.63 49 53.4 3.818 3.916 88 16.8 4:03 (220, 68) C/2019 K4 ( Ye ) Now it is 16.7 mag (Aug. 7, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition from August to September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 1 0.10 26 15.0 1.673 2.390 124 16.9 2:54 ( 0, 81) Aug. 31 0 47.56 22 5.2 1.595 2.417 135 16.8 2:14 ( 0, 77) C/2019 D1 ( Flewelling ) Now it is 16.8 mag (Aug. 2, Ken Ogawa). It is observable in excellent condition in the Northern Hemisphere. It locates extremely low in the Southern Hemisphere. It will be fading after this, and it will be fainter than 18 mag in late September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 1 12.31 46 45.1 1.535 2.095 108 16.9 3:06 (180, 78) Aug. 31 1 11.88 46 16.7 1.528 2.154 114 17.1 2:38 (180, 79) C/2018 KJ3 ( Lemmon ) Now it is 17.2 mag (May 26, iTelescope Observatory, Siding Spring). It will be fading slowly after this. It is observable in excellent condition in the Southern Hemisphere. It locates low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 14 31.21 -38 28.9 3.692 3.632 78 16.9 20:08 ( 41, 0) Aug. 31 14 28.20 -38 18.8 3.815 3.630 71 17.0 19:57 ( 43, -3) C/2016 R2 ( PanSTARRS ) Now it is 15.1 mag (Aug. 9, y). Small outburst occurred in early August. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it stays extremely low for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 14 50.81 27 41.8 5.586 5.281 67 16.9 20:08 ( 95, 46) Aug. 31 14 54.19 26 23.4 5.707 5.333 63 17.0 19:57 ( 95, 43) 160P/LINEAR It has not been observed yet in this apparition. It will brighten up to 16 mag in autumn. It is observable in good 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) Aug. 24 18 25.14 -37 21.7 1.264 2.009 123 17.2 20:16 ( 0, 18) Aug. 31 18 28.23 -35 46.8 1.295 1.982 118 17.1 19:57 ( 1, 19) 203P/Korlevic It will brighten up to 16.5 mag in winter, and it will be 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) Aug. 24 4 12.91 23 52.9 3.302 3.362 84 17.7 3:56 (283, 60) Aug. 31 4 18.76 24 10.0 3.195 3.351 90 17.6 4:03 (289, 65) 200P/Larsen It will brighten up to 17.5 mag, and it will be observable in good condition in autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 1 36.75 20 33.3 2.678 3.300 119 17.7 3:30 ( 0, 76) Aug. 31 1 37.11 20 36.8 2.602 3.302 126 17.6 3:03 ( 0, 76) 65P/Gunn Now it is fading. In 2019, it is observable at 17.5 mag in good condition in autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 2 56.12 11 16.6 3.683 4.069 105 17.8 3:56 (329, 63) Aug. 31 2 56.83 11 18.5 3.598 4.083 111 17.8 4:03 (348, 66) P/2012 K3 ( Gibbs ) It has not been observed yet in this apparition. It was expected to be observable at 17.5 mag from June to August. But actually, it was fainter than 21.5 mag in March (Mar. 10, Erwin Schwab). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 18 34.94 -21 15.0 1.311 2.089 127 17.8 20:26 ( 0, 34) Aug. 31 18 39.41 -22 12.9 1.372 2.091 122 17.9 20:03 ( 0, 33) C/2019 L3 ( ATLAS ) Now it is 17.5 mag (Aug. 7, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 12 mag in winter in 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 22 31.08 47 32.4 7.416 7.982 120 17.9 0:25 (180, 77) Aug. 31 22 27.23 47 38.2 7.336 7.937 123 17.8 23:49 (180, 77) 74P/Smirnova-Chernykh Now it is 16.9 mag (July 4, Alexander Baransky). It is observable at 17 mag in good condition in 2019. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 15 24.52 -17 32.4 3.994 3.998 82 17.8 20:08 ( 45, 23) Aug. 31 15 29.14 -17 56.8 4.105 4.007 77 17.9 19:57 ( 47, 21) P/2006 H1 ( McNaught ) First return of a new periodic comet which brightened up to 17 mag in 2006. It has not been recovered yet in this apparition. It will brighten up to 18 mag in autumn. It is observable in good condition in the Southern Hemisphere. It locates extremely low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 16 36.58 -37 25.4 2.166 2.577 102 17.9 20:08 ( 20, 14) Aug. 31 16 44.49 -37 2.3 2.227 2.558 97 17.9 19:57 ( 22, 14) 215P/NEAT In the Southern Hemisphere, it is observable at 18 mag in good condition from July to August. It locates low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 24 20 2.79 -33 42.9 2.757 3.619 143 17.9 21:53 ( 0, 21) Aug. 31 20 0.07 -33 38.2 2.816 3.617 136 18.0 21:23 ( 0, 21)