THE ASTRONOMER Electronic Circular No 594 1992 Jan 2 19.16UT 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 ------------------------------------------------------------------- COMET SHOEMAKER-LEVY (1991a1) Further precise positions have been reported as follows (cf E578): 1991 UT R.A. (2000) Decl. m1 Observer Nov. 3.17188 1 53 25.31 +38 35 16.6 McCrosky 3.18612 1 53 23.54 +38 35 14.6 " 6.18884 1 47 11.63 +38 27 32.2 " 6.20258 1 47 09.90 +38 27 29.8 " 7.30920 1 44 52.26 +38 23 59.4 15.5 Shoemaker 9.25938 1 40 49.70 +38 17 00.3 " 9.31806 1 40 42.37 +38 16 47.7 " Dec. 1.76250 0 57 20.38 +35 52 07.5 Meyer 1.80625 0 57 16.10 +35 51 46.0 " R. E. McCrosky and C.-Y. Shao (Oak Ridge). 1.5-m reflector + CCD. C. S. Shoemaker, E. M. Shoemaker and D. H. Levy (Palomar). 0.46-m Schmidt. Measurer T. King. E. Meyer and H. Raab (Linz). 0.3-m f/5.2 Schmidt-Cassegrain. Parabolic orbital elements from 26 observations Oct. 6-Dec. 1: T 1992 July 24.5080 TDT w 145.22420 ) e 1.00000000 O 49.05060 ) 2000.0 q 0.8365250 A.U. i 113.50190 ) Source: IAUC 5414 Positions are geocentric m = 7.5 + 5.0 log R + 10.0 log r Ephemeris by Hurst using a program by N.James: Date R.A. (2000) Dec. R r Elong Mag. Motion h m o ' (AU) (AU) o "/hr P.A. 1991 Dec 30.00 0 22.18 +31 55.1 2.913 3.226 99.6 14.9 31 234 1992 Jan 4.00 0 18.60 +31 20.1 2.941 3.168 94.1 14.9 27 231 9.00 0 15.73 +30 49.0 2.970 3.109 88.8 14.8 22 228 14.00 0 13.53 +30 22.2 2.998 3.050 83.6 14.7 17 225 19.00 0 11.94 +29 59.9 3.025 2.990 78.6 14.7 13 220 24.00 0 10.93 +29 42.2 3.050 2.930 73.7 14.6 9 213 29.00 0 10.42 +29 29.2 3.072 2.870 69.0 14.5 6 198 1992 Feb 3.00 0 10.40 +29 20.9 3.091 2.809 64.4 14.4 3 157 8.00 0 10.80 +29 17.4 3.105 2.748 60.0 14.4 4 99 13.00 0 11.60 +29 18.5 3.115 2.687 55.8 14.3 7 75 18.00 0 12.74 +29 24.3 3.119 2.625 51.8 14.2 9 65 23.00 0 14.20 +29 34.6 3.118 2.563 48.0 14.1 12 59 28.00 0 15.95 +29 49.4 3.111 2.500 44.4 13.9 15 55 COMET ZANOTTA-BREWINGTON (1991g1) Selected further observations reported: 1991 Dec 27.79, m1=9.4, dia 4' (0.15-m refl, A.Pereira, Portugal) 27.82, 9.2, dia 4' (0.15-m refl, C.Andrade e Silva) 28.74, 9.6, dia 3.5'(20x60B, Herman Mikuz, Yugoslavia) 28.80, 9.1, dia 3' (0.15-m refl, A.Pereira, Portugal) 28.81, 9.0, dia 4' (0.15-m refl, C.Andrade e Silva) Luciano Bittesini, Italy, e-mails a precise position: 1991 Dec 27.70972 20h58m43.90s +17 34'21.8"(2000) He comments that on Dec 27.72292 the comet was involved with the star PPM 139390 which is located at: 20h58m47.70s +17 34'08.8 (2000) Guy M Hurst