THE ASTRONOMER Electronic Circular No 599 1992 Jan 13 18.45UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074 Telex: 9312111261 Answerback: TA G JANET BOXES: GMH at UK.AC.CAM.ASTRONOMY.STARLINK or GUYH at UK.AC.SUSSEX.CLUSTER TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074 ------------------------------------------------------------------- 1992 AC The following observations are available of a fast-moving asteroidal object discovered by M. Koishikawa: 1992 UT R.A. (2000) Decl. Mag. Observer Jan. 3.61840 8 51 46.0 + 5 18 05 13.5 Akiyama 3.62917 8 51 47.1 + 5 18 25 " 5.70278 8 55 25.15 + 6 24 56.6 14 Koishikawa 5.72361 8 55 27.17 + 6 25 39.4 " 7.71962 8 59 01.41 + 7 36 24.6 11 Kushida 7.73715 8 59 03.13 + 7 37 05.8 13.0 Sugie 7.74062 8 59 03.49 + 7 37 11.7 Kushida 7.74479 8 59 03.93 + 7 37 22.7 Sugie M. Akiyama and T. Furuta (Susono). Prediscovery observations. M. Koishikawa (Sendai Observatory, Ayashi Station). 0.20-m reflector. Y. Kushida (Yatsugatake South Base Observatory). A. Sugie (Dynic Astronomical Observatory). 0.25-m f/3.4 Schmidt. Orbital elements by S. Nakano from the above observations: T = 1992 Feb. 16.671 TT Peri. = 25.352 e = 0.41585 Node = 121.788 2000.0 q = 1.21421 AU Incl. = 15.941 a = 2.07858 AU n = 0.328892 P = 3.00 years 1991/92 R. A. (2000) Decl. Delta r Elong. Phase V Jan 14 9 10.74 +12 03.5 0.296 1.260 156.4 18.2 12.8 19 9 20.75 +16 23.5 0.276 1.248 160.8 15.1 12.5 24 9 31.49 +21 20.3 0.261 1.237 163.8 12.9 12.3 29 9 43.03 +26 42.1 0.252 1.229 163.8 12.9 12.2 Feb. 3 9 55.41 +32 11.0 0.248 1.222 160.7 15.5 12.3 8 10 08.59 +37 26.2 0.249 1.217 155.7 19.5 12.4 13 10 22.45 +42 09.3 0.254 1.215 150.3 23.8 12.6 18 10 36.72 +46 07.8 0.264 1.214 145.1 27.8 12.8 IAUC 5426 NOVA PUPPIS 1991 Rob McNaught relays the following report: Photometry by A.C. Gilmore with the 0.6-m Boller & Chivens reflector at Mt John Observatory: U.T. V U-B B-V V-R V-I Nova Pup 1992 Jan. 9.502 8.66 -0.48 +0.60 +1.08 +1.27 Uncertainties about 0.01 mag in all colours except U-B which may be up to 0.06 more negative. Comparison stars measured differentially from HR 3199, assumed V = 6.22, B-V = + 0.92. Only one measure of each: Offset E from Nova (arcmins) ' ' V B-V A -11.0 +12.2 8.78 +0.25 B -12.1 + 8.1 9.20 -0.06 C - 8.5 + 0.4 9.32 +1.13 D + 0.4 - 9.5 10.11 +0.09 E - 5.4 + 2.1 10.74 +0.31 Guy M Hurst