THE ASTRONOMER Electronic Circular No 395 1990 Mar 19 21.38UT Microlink:MAG60138 JANET:GMH at UK.AC.RO-GREENWICH.STARLINK Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074 Telex: 94082518 Answerback: TAGUY ------------------------------------------------------------------ COMET CERNIS-KIUCHI-NAKAMURA (1990b) The following precise positions have been reported: 1990 UT R.A. (1950) Decl. m1 Observer Mar. 17.47188 1 08 49.19 +44 40 22.1 9.2 Seki 18.44410 1 14 26.17 +45 13 39.7 8.5 " 19.20590 1 18 57.68 +45 39 15.4 Tatum 19.42465 1 20 16.56 +45 46 36.3 8 Kojima 19.42795 1 20 17.73 +45 46 43.3 " 19.43530 1 20 20.37 +45 46 57.0 " T. Seki (Geisei). 0.60-m reflector. J. B. Tatum (Climenhaga Observatory, Victoria). T. Kojima (YGCO Chiyoda Observatory). 0.25-m f/3.4 Wright-Schmidt camera. The following preliminary parabolic orbital elements, from the above observations, are by S. Nakano, Center for Astrophysics: T = 1990 Mar. 17.128 ET Peri. = 100.367 Node = 347.641 1950.0 q = 1.06971 AU Incl. = 48.143 Ephemeris: 1990 ET R.A. (1950) Decl. Delta r m1 Mar. 5 0 10.07 +37 04.8 10 0 30.94 +40 10.7 1.454 1.076 8.6 15 0 55.29 +43 13.4 20 1 23.79 +46 05.6 1.376 1.071 8.5 25 1 56.98 +48 37.3 30 2 34.97 +50 36.0 1.321 1.091 8.5 Apr. 4 3 17.10 +51 48.7 9 4 01.62 +52 04.8 1.302 1.135 8.6 IAUC 4981 B.Granslo, Norway e-mails the following observation via STARLINK: DATE UT MAG MM REF APER TYPE F X COMA DC TAIL PAM OBS 900318.91 8.3 S S 20.3 T 10 50 2.7 3 GRA Martin Mobberley reports astrometry obtained from Cockfield Station