------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2582 2009 Sep 20 18.50UT 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 P/2009 R2 (PIGOTT-LINEAR-KOWALSKI) R. A. Kowalski reports his discovery on IAUC 9072 of a very diffuse comet on co-added CCD exposures with the Catalina 0.68-m Schmidt telescope. Peter Birtwhistle, Great Shefford, 0.40-m Schmidt-Cassegrain reflector on Sept. 11.2 UT notes the object as diffuse. Epoch = 1783 Nov. 10.0 TT T = 1783 Nov. 23.1803 TT Peri. = 354.0531 e = 0.578766 Node = 58.5969 2000.0 q = 1.458960 AU Incl. = 45.7727 a = 3.463539 AU n = 0.1529058 P = 6.45 years D. Chestnov, Moscow, Russia, has both suggested and demonstrated that comet P/2009 R2 = P/2003 A1. On IAUC 8044, the suggestion was made that P/2003 A1 = 1783 W1, although it was not possible unequivocally to demonstrate this at the time. Running the above orbit back to 1783 (closest approach to Jupiter 0.19 AU in 1971) yields Epoch = 1783 Nov. 10.0 TT T = 1783 Nov. 23.1803 TT Peri. = 354.0531 e = 0.578766 Node = 58.5969 2000.0 q = 1.458960 AU Incl. = 45.7727 a = 3.463539 AU n = 0.1529058 P = 6.45 years This result compares very favourably with the orbit by C. H. F. Peters (1860, Bruennow's Astron. Notes, No. 19), notably with T, q, and Node agreeing to 2.275 days, 0.0003 AU, and 0.08 deg, respectively. Although the quality of the observations is poor, the above orbit by Marsden satisfies fourteen of them made during 1783 Nov. 22-Dec. 4 to within < 10' in each coordinate, provided that T is corrected to 1783 Nov. 19.59. SUPERNOVA 2009hm IN NGC 7083 Discovery by Stuart Parker of New Zealand of a possible supernova (CBET 1880): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009hm Jly 17.70 21 35 44.44 -63 54 23.6 14.7R 2 "W,13 "S Supernova 1983Y was also detected in this galaxy. SUPERNOVA 2009hn IN UGC 2005 Discovery by LOSS of a possible supernova (CBET 1886): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009hn Jly 24.47 02 32 00.31 +01 14 53.5 17.5 38.5"E, 6.1"N SUPERNOVA 2009ho IN UGC 1941 Discovery by LOSS of a possible supernova (CBET 1886): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009ho Jly 25.44 02 28 33.34 +37 57 04.1 18.4 21.9"W, 3.9"S SUPERNOVA 2009hp IN MCG +01-08-30 Discovery by LOSS of a possible supernova (CBET 1888): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009hp Jly 26.50 02 58 23.96 +06 35 35.1 16.7 9.1"W, 4.0"N SUPERNOVA 2009hq IN NGC 4152 Discovery by Berto Monard of South Africa of a possible supernova (CBET 1890): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009hq Jly 30.69 12 10 38.03 +16 02 21.1 15.5 7 "E,23 "N SUPERNOVA 2009hr IN ANONYMOUS GALAXY Discovery by CRTS of a possible supernova (CBET 1891): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009hr Jly 29.45 00 40 34.13 +03 32 29.1 15.9 1.6"W, 9.0"S Guy M Hurst