Circular No. 5177 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN COMET SHOEMAKER-LEVY (1991d) The following precise positions have been reported: 1991 UT R.A. (1950) Decl. m1 Observer Jan. 13.44844 9 44 27.17 - 3 23 18.0 15.0 Helin 13.46736 9 44 26.49 - 3 23 08.3 " 15.49896 9 43 15.41 - 3 06 03.4 " 15.52326 9 43 14.47 - 3 05 53.0 " 19.65104 9 40 38.59 - 2 28 24.8 15 Koishikawa 19.67535 9 40 37.98 - 2 28 11.2 " 29.64278 9 33 24.21 - 0 43 14.3 16 Seki 29.66840 9 33 22.80 - 0 42 58.3 " E. Helin, K. Lawrence, P. Rose, and R. Bambery (Palomar). Prediscovery 0.46-m Schmidt telescope films. M. Koishikawa (Sendai Astronomical Observatory, Ayashi Station). 300-mm f/2.8 telephoto lens. Prediscovery images. T. Seki (Geisei). Preliminary parabolic orbital elements by S. Nakano, Sumoto, Japan, from 8 observations Jan. 13-29: T = 1991 Dec. 29.106 ET Peri. = 74.500 Node = 144.461 1950.0 q = 2.24936 AU Incl. = 77.082 1991 ET R.A. (1950) Decl. Delta r m1 Jan. 4 9 49.10 - 4 31.5 3.723 4.412 15.8 9 9 46.82 - 3 57.6 14 9 44.14 - 3 18.7 3.527 4.331 15.6 19 9 41.07 - 2 34.6 24 9 37.65 - 1 45.2 3.359 4.250 15.4 29 9 33.91 - 0 50.6 Feb. 3 9 29.89 + 0 08.9 3.221 4.169 15.2 8 9 25.66 + 1 13.1 13 9 21.28 + 2 21.3 3.119 4.088 15.1 18 9 16.82 + 3 33.0 23 9 12.36 + 4 47.4 3.055 4.008 15.0 1991 January 30 (5177) Daniel W. E. Green
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