------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2899 2013 Mar 14 15.42UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- COMET C/2012 F6 (LEMMON) Contributors to 'The Astronomer' have covered this comet extensively both by imaging and visual estimates which suggest by the end of February it had reached magnitude 4. This is significantly brighter than the predicted m1 figures shown on the Minor Planet Center website and used in their ephemeris below so may persuade other contributors to participate: Date TT R. A. (2000) Decl. Delta r Elong m1 2013 03 14 00 09 03.0 -35 51 03 1.3412 0.7610 34.1 9.5 2013 03 15 00 09 12.1 -34 46 17 1.3544 0.7557 33.3 9.4 2013 03 16 00 09 20.1 -33 42 14 1.3675 0.7510 32.5 9.4 2013 03 17 00 09 27.3 -32 38 53 1.3805 0.7467 31.7 9.4 2013 03 18 00 09 33.7 -31 36 12 1.3933 0.7429 30.9 9.4 2013 03 19 00 09 39.4 -30 34 07 1.4059 0.7396 30.1 9.4 2013 03 20 00 09 44.5 -29 32 37 1.4183 0.7369 29.4 9.4 2013 03 21 00 09 49.2 -28 31 40 1.4305 0.7347 28.7 9.4 2013 03 22 00 09 53.6 -27 31 13 1.4424 0.7330 28.1 9.4 2013 03 23 00 09 57.6 -26 31 15 1.4541 0.7319 27.5 9.5 2013 03 24 00 10 01.5 -25 31 45 1.4656 0.7313 26.9 9.5 2013 03 25 00 10 05.3 -24 32 41 1.4768 0.7313 26.3 9.5 2013 03 26 00 10 09.1 -23 34 01 1.4877 0.7318 25.8 9.5 2013 03 27 00 10 13.0 -22 35 45 1.4983 0.7329 25.3 9.5 2013 03 28 00 10 17.0 -21 37 50 1.5087 0.7346 24.9 9.6 2013 03 29 00 10 21.2 -20 40 18 1.5187 0.7368 24.5 9.6 2013 03 30 00 10 25.7 -19 43 06 1.5285 0.7395 24.1 9.6 2013 03 31 00 10 30.5 -18 46 13 1.5379 0.7427 23.8 9.6 2013 04 01 00 10 35.7 -17 49 40 1.5471 0.7465 23.5 9.7 2013 04 02 00 10 41.3 -16 53 25 1.5559 0.7507 23.3 9.7 2013 04 03 00 10 47.3 -15 57 28 1.5645 0.7555 23.2 9.8 2013 04 04 00 10 53.8 -15 01 49 1.5727 0.7608 23.0 9.8 SUPERNOVA 2013Y (KISS) 2013Y Feb 6.66 12 09 39.70 +16 12 14.3 18.7 1.2"E 2.1"N F. Taddia: spectrum Feb 11 normal type-Ia around maximum SUPERNOVA 2013Z (THRU-NAOC TRANSIENT SURVEY) 2013Z Jan 24.90 13 27 54.89 +30 22 29.4 19.0 6 "W 5 "S C. Inserra: spectrum Feb 10 type-II 2-4 weeks after maximum SUPERNOVA 2013aa IN NGC 5643 (PARKER) 2013aa Feb 13.62 14 32 33.88 -44 13 27.8 11.9 74 "W 180 "S An image has been posted at: http://tinyurl.com/dx7tfrx J. T. Parrent: spectrum Feb 15 type-Ia a few days before maximum SUPERNOVA 2013ab IN NGC 5669 (LOSS) 2013ab Feb 17.54 14 32 44.49 +09 53 12.3 17.6 7.5"E 18.1"S S. B. Cenko: spectrum Feb 18 are suggestive of a very young type-II supernova Guy M Hurst