Circular No. 5628

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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)

1992 SK E. F. Helin reports the discovery by J. Alu and herself of a fast-moving

asteroidal object on films taken by Helin, Alu, K. Lawrence, and P. Rose with the Palomar 0.46-m Schmidt. R. H. McNaught also reports his measures of U.K. Schmidt films taken by K. S. Russell on Oct. 5.

1992 UT  α_{2000}  δ_{2000}  Mag. Observer
Sept.24.44948 1^{h}38^{m}28.^{s}55 + 9^{o}57′17′′.8  17 Helin
24.47240 1 38 23.34 + 9 57 34.9  _{”}
26.42882 1 31 48.22 +10 21 02.2  _{”}
26.44983 1 31 43.90 +10 21 15.3  _{”}
Oct. 5.62760 1 00 49.88 +11 48 28.7  Russell
5.63802 1 00 47.98 +11 48 31.5  _{”}

Orbital elements by G. V. Williams, Center for Astrophysics:

T = 1992 May 18.073 TT  ω = 233.^{o}860
e = 0.31960  Ω = 8.977 }2000.0
q = 0.84705 AU  i = 14.958

a = 1.24492 AU n^{o} = 0.709563 P = 1.39 years

1992TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
Oct. 5 1^{h}02.^{m}89 +11^{o}43.^{′}5 0.421 1.418 171.^{o}7 5.^{o}8 15.8
10 0 47.14 +12 16.4 0.441 1.437 173.2  4.7 15.9
15 0 33.02 +12 39.8 0.466 1.455 167.4  8.6 16.2
20 0 20.94 +12 55.9 0.496 1.473 160.5 13.1 16.6
25 0 11.08 +13 07.3 0.532 1.489 153.7 17.2 16.9
30 0 03.47 +13 16.4 0.571 1.505 147.2 20.9 17.2
Nov. 4 23 57.99 +13 25.1 0.614 1.520 141.3 24.1 17.5
9 23 54.46 +13 35.0 0.661 1.534 135.7 26.8 17.7
14 23 52.65 +13 46.7 0.710 1.548 130.6 29.1 18.0

NOVA PUPPIS 1991 Additional photometry (cf. IAUC 5566) by A. C. Gilmore, Mt. John

University Observatory: Sept. 17.67 UT, V = 11.86 ± 0.02, B–V = –0.03 ± 0.03, U–B = –1.06 ± 0.03, V–R = +0.59 ± 0.02, V–I = +0.54 ± 0.05.

1992 October 6 Daniel W. E. Green