THE ASTRONOMER Electronic Circular No 704 1993 Jan 30 19.10UT 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 TELECOM GOLD: 10074:MIK2885 GMH at UK.AC.RUTHERFORD.STARLINK.ASTROPHYSICS STARLINK: RLSAC::GMH GMH at UK.AC.CAM.ASTRONOMY.STARLINK STARLINK: CAVAD::GMH ------------------------------------------------------------------- 1980 AA = 1993 BC2 E. Helin and P. Rose report their discovery of a fast-moving asteroidal object on films taken with the 0.46-m Schmidt telescope at Palomar by Helin, K. Lawrence, and Rose. The following positions were measured by Rose (clouds were present during the last two exposures on Jan. 21): 1993 UT R.A. (2000) Decl. Mag. Jan. 21.25122 6 15 43.55 +23 24 04.7 14.0 21.25538 6 15 45.50 +23 23 49.6 21.26910 6 15 52.38 +23 22 54.7 21.27326 6 15 54.35 +23 22 41.7 22.38785 6 25 38.16 +22 11 33.2 22.39271 6 25 40.22 +22 11 20.7 IAUC 5695 G. V. Williams, Minor Planet Center, has found 1993 BC2 to be identical with an object found by A. Mrkos at Klet in 1980, yielding the following orbital elements: Epoch = 1993 Jan. 13.0 TT T = 1993 Jan. 10.3276 TT Peri. = 168.0400 e = 0.443894 Node = 299.2261 2000.0 q = 1.052286 AU Incl. = 4.1891 a = 1.892240 AU n = 0.3786517 P = 2.603 years 1993 TT R. A. (2000) Decl. Delta r Elong. Phase V Jan 29 7 17.74 +15 15.2 0.094 1.073 158.6 19.6 14.5 31 7 31.18 +13 19.7 0.098 1.077 159.5 18.7 14.6 Feb. 2 7 43.55 +11 32.4 0.102 1.082 160.1 18.1 14.7 4 7 54.88 + 9 53.9 0.107 1.087 160.4 17.7 14.8 6 8 05.25 + 8 24.5 0.113 1.093 160.6 17.5 14.9 8 8 14.72 + 7 04.2 0.119 1.099 160.6 17.4 15.0 10 8 23.38 + 5 52.7 0.125 1.106 160.5 17.4 15.1 12 8 31.30 + 4 49.5 0.132 1.113 160.2 17.4 15.3 14 8 38.56 + 3 53.9 0.140 1.120 160.0 17.6 15.4 16 8 45.22 + 3 05.3 0.147 1.127 159.6 17.8 15.5 18 8 51.38 + 2 23.0 0.155 1.135 159.3 18.0 15.7 20 8 57.08 + 1 46.3 0.164 1.143 158.8 18.2 15.8 22 9 02.38 + 1 14.7 0.173 1.152 158.4 18.5 15.9 IAUC 5697 Herman Mikuz, Slovenia, has e-mailed details of photometry obtained with the 0.19-m f/4 flat field camera + V filter + CCD. 1993 Jan 23.81UT, V=14.6 (comparison= HR 2529) PERIODIC COMET BUS (1993b) J. V. Scotti, Lunar and Planetary Laboratory, reports his recovery of this comet with the Spacewatch 0.9-m telescope at Kitt Peak: 1993 UT R.A. (2000) Decl. m2 Jan. 1.19512 5 05 01.43 +19 27 56.9 21.8 1.20817 5 05 00.83 +19 27 56.1 21.0 1.22023 5 05 00.36 +19 27 56.4 21.5 1.23231 5 04 59.76 +19 27 55.7 21.6 21.13902 4 53 40.89 +19 21 00.7 22.1 21.15178 4 53 40.53 +19 21 00.4 21.8 21.16389 4 53 40.22 +19 21 00.6 21.7 21.17677 4 53 39.91 +19 21 00.3 21.8 The Jan. 1 images are stellar, but the Jan. 21 images showed the slightest hint of being nonstellar. The indicated correction to the prediction on MPC 19257 is Delta T = +0.05 day. IAUC 5696 Guy M Hurst