------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1370 1998 Dec 30 20.43UT 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 GMH at AST.STAR.RL.AC.UK WORLD WIDE WEB http://www.demon.co.uk/astronomer ------------------------------------------------------------------- COMET P/1998 VS24 (LINEAR) On further examining the Nov. 10-11 observations, published on MPS 3154, of an apparently unremarkable asteroidal discovery from the LINEAR program, G. V. Williams made identifications with isolated sets of observations from Visnjan on Oct. 24, 28 (the latter having been published on MPS 2894 as one of two objects that were both erroneously identified with 1998 UD19) and Nov. 26. The resulting orbit was very cometary in form. Furthermore, he recognized that the object had made an extremely close approach (< 0.01 AU) to Jupiter in Oct. 1971, with additional approaches to 0.5-0.7 AU in both 1983 and 1995. Here are representative observations: 1998 UT R.A. (2000) Decl. m2 Observer Oct. 24.84196 3 03 16.98 +10 45 25.2 Visnjan 28.91355 3 00 54.41 +10 30 48.8 17.9 " Nov. 10.25724 2 53 13.55 + 9 48 34.3 18.5 LINEAR 11.28224 2 52 34.86 + 9 45 20.5 18.5 " 26.73186 2 43 34.79 + 9 05 16.9 Visnjan Following placement of the object in The NEO Confirmation Page, observations during Dec. 18.9-19.3 UT have been reported by J. Ticha and M. Tichy (Klet), P. Pravec (Ondrejov), W. B. Offutt (Cloudcroft) and G. C. L. Aikman (Victoria), most of whom remark that the object indeed seems to be of cometary appearance. Epoch = 1998 Nov. 3.0 TT T = 1998 Nov. 6.3700 TT Peri. = 245.1677 e = 0.244762 Node = 159.1699 2000.0 q = 3.402590 AU Incl. = 5.0282 a = 4.505324 AU n = 0.1030659 P = 9.563 years 1998/99 R. A. (2000) Decl. Delta r Elong.Phase m2 Dec. 13 2 37.14 + 8 47.4 2.606 3.407 138.5 11.0 18.4 23 2 35.43 + 8 50.8 2.713 3.409 128.1 13.1 18.6 Jan. 2 2 35.63 + 9 05.0 2.837 3.413 118.1 14.7 18.8 12 2 37.72 + 9 28.9 2.973 3.416 108.6 15.8 18.9 IAUC 7071 (extract) SUPERNOVA 1998ez IN ANONYMOUS GALAXY L. Germany reports the discovery by the Mount Stromlo Abell Cluster Supernova Search Team of an apparent supernova (V = 20) on V and R CCD images taken on Dec. 8 (limiting mag V = 21) by S. Sabine at the Mount Stromlo 1.27-m telescope (+ Macho Camera). SN 1998ez is located near Abell 3188 at R.A. =3h57m32s.93, Decl. = -27o12'13".6 (2000.0), which is 0".7 east and 4".0 north of the host galaxy's centre. A nearby star has position end figures 30s.25, 11'16".1. SN 1998ez was not visible on similar images taken on Oct. 24 (limiting mag V = 20.5) but it was confirmed by S. Sabine with the same telescope (limiting mag V = 20), and by L. Germany with the Mount Stromlo 2.3-m telescope (in B, V, R, and I), on Dec. 11. IAUC 7070 (extract) TAV J0218+507 The date quoted on E1369 from which the magnitude of 10.5 was derived by Mike Collins was incorrectly given as 1988 Sept 20. This should have read 1998 Sept 20. Guy M Hurst