Comet C/2017 M4 (ATLAS)

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Observation date	image	Photometry (FOCAS)	Afρ	astrometry	Observatory
20170623	X			X	B96 - BRIXIIS
20170702	X	X		X	B96 - BRIXIIS
20170708	X	X		X	B96 - BRIXIIS
20170712	X	X		X	B96 - BRIXIIS
20170727	X	X		X	B96 - BRIXIIS
20170922	X	X		X	B96 - BRIXIIS
20170923	X	X		X	B96 - BRIXIIS
20170924	X	X		X	B96 - BRIXIIS
20171013	X	X		X	B96 - BRIXIIS
20171014	X	X		X	B96 - BRIXIIS
20171021	X	X		X	B96 - BRIXIIS
20171106	X	X		X	B96 - BRIXIIS
20171107	X	X		X	B96 - BRIXIIS
20180604	X	X		X	B96 - BRIXIIS
20180605	X	X	X	X	B96 - BRIXIIS
20180609	X	X	X	X	B96 - BRIXIIS
20180618	X	X	X	X	B96 - BRIXIIS
20180620	X	X	X	X	B96 - BRIXIIS
20180621	X	X	X	X	B96 - BRIXIIS
20180625	X	X	X	X	B96 - BRIXIIS
20180626	X	X	X	X	B96 - BRIXIIS
20180627	X	X	X	X	B96 - BRIXIIS
20180628	X	X	X	X	B96 - BRIXIIS
20180701	X	X	X	X	B96 - BRIXIIS
20180706	X	X	X	X	B96 - BRIXIIS
20180707	X	X	X	X	B96 - BRIXIIS
20180708	X	X	X	X	B96 - BRIXIIS
20180712	X	X	X	X	B96 - BRIXIIS
20180713	X	X	X	X	B96 - BRIXIIS
20180714	X	X	X	X	B96 - BRIXIIS
20180716	X	X	X	X	B96 - BRIXIIS
20180717	X	X	X	X	B96 - BRIXIIS
20180718	X	X	X	X	B96 - BRIXIIS
20180721	X	X	X	X	B96 - BRIXIIS
20180724	X	X	X	X	B96 - BRIXIIS
20180801	X	X	X	X	B96 - BRIXIIS
20180802	X	X	X	X	B96 - BRIXIIS
20180803	X	X	X	X	B96 - BRIXIIS
20180805	X	X	X	X	B96 - BRIXIIS
20180806	X	X	X	X	B96 - BRIXIIS
20180808	X	X	X	X	B96 - BRIXIIS
20180817	X	X	X	X	B96 - BRIXIIS
20180831	X	X	X	X	B96 - BRIXIIS
20180901	X	X	X	X	B96 - BRIXIIS
20180902	X	X	X	X	B96 - BRIXIIS
20180924	X	X	X	X	B96 - BRIXIIS

Comet C/2017 M4 (ATLAS)

Photometric data obtained from FOCAS-II software

COD B96

CON BRIXIIS Observatory - Eyckensbeekstraat 2, B-9150 Kruibeke, Belgium

CATALOG: USNO A2.0 / CMC 14-15 - BAND: R

10x10 20x20 30x30 40x40 50x50 60x60 SNR SB COD

COMET UTC +/- +/- +/- +/- +/- +/- N FWHM CAT

------------ ------------------- ----- ----- ----- ----- ----- ----- ---- ---- ---

C/2017 M4 23/06/2017 22:18:30 18.02 17.94 17.64 17.55 17.47 4.3 17.4 B96

C/2017 M4 23/06/2017 22:18:30* 0.20 0.43 0.58 0.78 1.10 8 3.9 USN

C/2017 M4 02/07/2017 22:27:12 18.12 18.00 17.98 4.0 18.2 B96

C/2017 M4 02/07/2017 22:27:12* 0.13 0.12 0.15 5 3.9 USN

C/2017 M4 08/07/2017 22:22:05 17.98 17.95 17.88 17.71 17.49 17.42 3.1 17.6 B96

C/2017 M4 08/07/2017 22:22:05* 0.15 0.24 0.26 0.18 0.51 0.69 4 3.9 USN

C/2017 M4 12/07/2017 22:01:26 17.59 17.44 17.52 5.8 17.3 B96

C/2017 M4 12/07/2017 22:01:26* 0.11 0.29 0.28 5 3.8 USN

C/2017 M4 27/07/2017 21:56:01 17.59 17.39 17.35 9.8 18.1 B96

C/2017 M4 27/07/2017 21:56:01* 0.14 0.21 0.08 4 3.9 USN

C/2017 M4 22/09/2017 21:00:33 17.54 17.25 17.21 17.23 17.24 17.14 12.9 18.5 B96

C/2017 M4 22/09/2017 21:00:33* 0.04 0.04 0.03 0.11 0.24 0.39 4 3.6 USN

C/2017 M4 24/09/2017 20:39:10 17.50 17.25 17.31 8.7 18.0 B96

C/2017 M4 24/09/2017 20:39:10* 0.08 0.18 0.23 4 3.9 USN

C/2017 M4 13/10/2017 19:25:21 17.50 17.11 16.94 16.83 16.79 16.84 13.7 18.6 B96

C/2017 M4 13/10/2017 19:25:21* 0.04 0.03 0.12 0.22 0.25 0.31 4 3.6 USN

C/2017 M4 14/10/2017 19:36:18 17.52 17.22 17.30 11.4 18.3 B96

C/2017 M4 14/10/2017 19:36:18* 0.06 0.06 0.06 6 3.2 USN

C/2017 M4 21/10/2017 19:09:28 17.45 17.02 16.64 6.2 18.4 B96

C/2017 M4 21/10/2017 19:09:28* 0.06 0.08 0.20 4 5.1 USN

C/2017 M4 06/11/2017 18:48:36 17.44 17.12 10.9 18.0 B96

C/2017 M4 06/11/2017 18:48:36* 0.05 0.09 4 4.0 USN

C/2017 M4 04/06/2018 23:02:10 15.79 15.16 14.88 14.77 14.72 14.70 26.3 18.0 B96

C/2017 M4 04/06/2018 23:02:10* 0.02 0.02 0.02 0.03 0.05 0.07 4 3.9 USN

C/2017 M4 05/06/2018 22:06:32 15.54 14.98 14.72 14.63 14.67 19.8 17.4 B96

C/2017 M4 05/06/2018 22:06:32* 0.03 0.03 0.03 0.03 0.07 5 3.4 USN

C/2017 M4 09/06/2018 22:08:28 15.41 14.83 14.59 14.49 14.50 14.54 17.6 16.6 B96

C/2017 M4 09/06/2018 22:08:28* 0.03 0.08 0.09 0.12 0.17 0.16 4 3.5 CMC

C/2017 M4 20/06/2018 21:47:44 15.37 14.68 14.42 14.30 14.27 14.28 24.3 17.6 B96

C/2017 M4 20/06/2018 21:47:44* 0.02 0.02 0.03 0.03 0.05 0.07 5 3.7 USN

C/2017 M4 21/06/2018 21:47:20 15.31 14.62 14.35 14.21 14.17 14.15 26.4 17.5 B96

C/2017 M4 21/06/2018 21:47:20* 0.01 0.01 0.01 0.02 0.02 0.03 5 3.7 USN

C/2017 M4 25/06/2018 22:01:29 15.54 14.84 14.56 14.44 14.36 14.35 26.3 17.9 B96

C/2017 M4 25/06/2018 22:01:29* 0.02 0.02 0.01 0.01 0.02 0.03 5 3.4 USN

C/2017 M4 01/07/2018 22:15:11 15.45 14.76 14.51 14.37 14.30 14.26 23.2 18.4 B96

C/2017 M4 01/07/2018 22:15:11* 0.01 0.01 0.02 0.03 0.03 0.05 5 3.9 USN

C/2017 M4 07/07/2018 21:56:14 15.50 14.83 14.55 14.40 14.35 14.31 26.7 17.7 B96

C/2017 M4 07/07/2018 21:56:14* 0.01 0.02 0.03 0.02 0.02 0.03 5 3.5 USN

C/2017 M4 08/07/2017 22:22:05 17.98 17.95 17.88 17.71 17.49 17.42 3.1 17.6 B96

C/2017 M4 08/07/2017 22:22:05* 0.15 0.24 0.26 0.18 0.51 0.69 4 3.9 USN

C/2017 M4 12/07/2018 21:58:13 15.11 14.44 14.18 14.06 13.99 13.95 27.7 18.0 B96

C/2017 M4 12/07/2018 21:58:13* 0.02 0.02 0.02 0.02 0.04 0.04 5 3.7 USN

C/2017 M4 13/07/2018 22:00:29 15.14 14.47 14.19 14.04 13.99 13.98 26.7 17.8 B96

C/2017 M4 13/07/2018 22:00:29* 0.02 0.05 0.03 0.02 0.04 0.05 5 3.7 USN

C/2017 M4 14/07/2018 22:05:33 15.09 14.44 14.14 13.99 13.94 13.91 19.7 18.2 B96

C/2017 M4 14/07/2018 22:05:33* 0.06 0.04 0.03 0.04 0.01 0.02 2 3.8 USN

C/2017 M4 16/07/2018 22:36:35 15.17 14.51 14.24 14.10 14.03 14.00 25.8 17.7 B96

C/2017 M4 16/07/2018 22:36:35* 0.01 0.04 0.05 0.05 0.07 0.07 5 3.7 USN

C/2017 M4 17/07/2018 22:00:05 15.14 14.46 14.17 14.03 13.98 13.94 26.9 18.0 B96

C/2017 M4 17/07/2018 22:00:05* 0.01 0.01 0.02 0.01 0.01 0.02 5 3.8 USN

C/2017 M4 18/07/2018 22:02:25 14.69 14.03 13.77 13.63 13.57 13.55 23.5 17.4 B96

C/2017 M4 18/07/2018 22:02:25* 0.02 0.04 0.05 0.05 0.06 0.08 7 3.9 USN

C/2017 M4 21/07/2018 21:38:57 14.70 14.04 13.78 13.63 13.56 13.53 27.3 16.9 B96

C/2017 M4 21/07/2018 21:38:57* 0.01 0.03 0.02 0.03 0.04 0.03 4 3.8 USN

C/2017 M4 23/07/2018 21:40:20 14.73 14.05 13.77 13.62 13.55 13.51 26.3 17.1 B96

C/2017 M4 23/07/2018 21:40:20* 0.00 0.02 0.03 0.04 0.05 0.06 3 3.8 USN

C/2017 M4 01/08/2018 21:31:05 15.16 14.47 14.18 14.05 13.98 13.95 17.5 17.8 B96

C/2017 M4 01/08/2018 21:31:05* 0.02 0.03 0.02 0.03 0.03 0.04 7 3.7 USN

C/2017 M4 02/08/2018 21:00:23 15.56 14.89 14.59 14.45 14.39 14.35 27.5 17.9 B96

C/2017 M4 02/08/2018 21:00:23* 0.00 0.02 0.03 0.03 0.04 0.03 3 3.5 Gai

C/2017 M4 05/08/2018 21:12:15 15.34 14.67 14.40 14.25 14.17 14.13 18.5 18.3 B96

C/2017 M4 05/08/2018 21:12:15* 0.01 0.04 0.05 0.06 0.05 0.07 4 3.8 CMC

C/2017 M4 06/08/2018 21:08:00 15.35 14.66 14.36 14.22 14.15 14.13 21.3 18.0 B96

C/2017 M4 06/08/2018 21:08:00* 0.01 0.01 0.00 0.01 0.02 0.02 3 3.7 CMC

C/2017 M4 08/08/2018 20:59:52 15.33 14.66 14.39 14.23 14.16 14.13 16.1 18.2 B96

C/2017 M4 08/08/2018 20:59:52* 0.02 0.02 0.03 0.03 0.05 0.05 6 3.8 CMC

C/2017 M4 17/08/2018 20:59:10 15.31 14.63 14.33 14.19 14.11 14.08 19.3 17.3 B96

C/2017 M4 17/08/2018 20:59:10* 0.02 0.02 0.02 0.01 0.03 0.02 4 4.3 CMC

C/2017 M4 31/08/2018 20:21:51 15.45 14.74 14.40 14.27 14.21 14.18 13.0 17.1 B96

C/2017 M4 31/08/2018 20:21:51* 0.01 0.04 0.05 0.01 0.01 0.02 2 3.7 CMC

C/2017 M4 01/09/2018 20:02:35 15.22 14.57 14.27 14.13 14.06 14.02 21.8 17.5 B96

C/2017 M4 01/09/2018 20:02:35* 0.02 0.05 0.04 0.05 0.07 0.12 6 3.6 USN

C/2017 M4 02/09/2018 20:04:02 15.34 14.69 14.40 14.27 14.22 14.21 24.8 17.8 B96

C/2017 M4 02/09/2018 20:04:02* 0.01 0.01 0.01 0.00 0.02 0.02 4 3.9 CMC

C/2017 M4 24/09/2018 19:16:23 15.29 14.58 14.29 14.18 14.11 14.07 18.3 17.0 B96

C/2017 M4 24/09/2018 19:16:23* 0.03 0.07 0.08 0.12 0.17 0.23 6 4.0 CMC

AFRHO LOG

COMET UTC DELTA r BOX " MAG RSR CM +/- AFRHO OBS

------------ ------------------- ----- ----- ----- ----- --- ----- ---- ----- ---

C/2017 M4 23/06/2017 22:18:30 6.11 6.02 4.51 18.37 4 586 136 2.768 B96

C/2017 M4 08/07/2017 22:22:05 5.92 5.92 4.65 18.34 3 547 176 2.738 B96

C/2017 M4 12/07/2017 22:01:26 5.88 5.90 4.69 17.63 6 1028 177 3.012 B96

C/2017 M4 27/07/2017 21:56:01 5.69 5.79 4.84 17.74 10 835 85 2.922 B96

C/2017 M4 22/09/2017 21:00:33 5.25 5.41 5.26 17.59 13 713 55 2.853 B96

C/2017 M4 24/09/2017 20:39:10 5.24 5.40 5.26 17.59 9 705 81 2.848 B96

C/2017 M4 13/10/2017 19:25:21 5.20 5.29 5.30 17.68 14 617 45 2.790 B96

C/2017 M4 14/10/2017 19:36:18 5.20 5.28 5.30 17.62 11 647 57 2.811 B96

C/2017 M4 21/10/2017 19:09:28 5.19 5.24 5.31 17.93 6 479 77 2.680 B96

C/2017 M4 04/06/2018 23:02:10 3.46 3.89 7.96 15.82 26 821 31 2.915 B96

C/2017 M4 05/06/2018 22:06:32 3.45 3.88 7.98 15.59 20 1009 51 3.004 B96

C/2017 M4 09/06/2018 22:08:28 3.41 3.86 8.08 15.39 18 1171 67 3.069 B96

C/2017 M4 18/06/2018 21:47:33 3.34 3.82 8.27 15.23 22 1268 58 3.103 B96

C/2017 M4 20/06/2018 21:47:44 3.32 3.81 8.30 15.35 24 1120 46 3.049 B96

C/2017 M4 21/06/2018 21:47:20 3.31 3.81 8.32 15.30 26 1156 44 3.063 B96

C/2017 M4 25/06/2018 22:01:29 3.29 3.79 8.38 15.53 26 912 35 2.960 B96

C/2017 M4 01/07/2018 22:15:11 3.26 3.76 8.46 15.45 23 958 41 2.981 B96

C/2017 M4 07/07/2018 21:56:14 3.24 3.73 8.51 15.50 27 889 33 2.949 B96

C/2017 M4 08/07/2017 22:22:05 5.92 5.92 4.65 18.34 3 547 176 2.738 B96

C/2017 M4 12/07/2018 21:58:13 3.23 3.71 8.53 15.10 28 1262 46 3.101 B96

C/2017 M4 13/07/2018 22:00:29 3.23 3.71 8.54 15.13 27 1224 46 3.088 B96

C/2017 M4 14/07/2018 22:05:33 3.23 3.70 8.54 15.09 20 1263 64 3.101 B96

C/2017 M4 16/07/2018 22:36:35 3.23 3.69 8.54 15.17 26 1172 45 3.069 B96

C/2017 M4 17/07/2018 22:00:05 3.23 3.69 8.54 15.13 27 1208 45 3.082 B96

C/2017 M4 18/07/2018 22:02:25 3.23 3.68 8.53 14.68 24 1829 78 3.262 B96

C/2017 M4 21/07/2018 21:38:57 3.23 3.67 8.52 14.70 27 1787 65 3.252 B96

C/2017 M4 23/07/2018 21:40:20 3.24 3.66 8.51 14.73 26 1730 66 3.238 B96

C/2017 M4 01/08/2018 21:31:05 3.27 3.62 8.44 15.16 18 1165 67 3.066 B96

C/2017 M4 02/08/2018 21:00:23 3.27 3.62 8.43 15.57 28 799 29 2.903 B96

C/2017 M4 05/08/2018 21:12:15 3.29 3.61 8.38 15.36 19 975 53 2.989 B96

C/2017 M4 06/08/2018 21:08:00 3.29 3.60 8.37 15.36 21 975 46 2.989 B96

C/2017 M4 08/08/2018 20:59:52 3.31 3.60 8.34 15.35 16 986 61 2.994 B96

C/2017 M4 17/08/2018 20:59:10 3.37 3.56 8.18 15.34 19 1011 52 3.005 B96

C/2017 M4 31/08/2018 20:21:51 3.50 3.51 7.89 15.50 13 913 70 2.961 B96

C/2017 M4 01/09/2018 20:02:35 3.50 3.51 7.87 15.28 22 1120 51 3.049 B96

C/2017 M4 24/09/2018 19:16:23 3.75 3.43 7.36 15.37 18 1128 62 3.052 B96

C/2017 M4 02/09/2018 20:04:02 3.51 3.50 7.85 15.38 25 1025 41 3.011 B96

Af(rho) data according the CARA-approach is available via request to CARA-coordinator

http://cara.uai.it

CBET nr. 4397, issued on 2017, June 01, announces the discovery of a comet (magnitude ~17) with the ATLAS T 0.5-m f/2.0 Schmidt telescope at Haleakala on CCD exposures taken on May 26.5 with the ATLAS 0.5-m f/2.0 Schmidt telescope at Haleakala. The new comet has assigned as C/2017 K4 (ATLAS).