Circular No. 5631

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 TC

R. H. McNaught reports his discovery of a fast-moving asteroidal object on films taken by M. J. Drinkwater with the U.K. Schmidt Telescope.

1992 UT α_{2000} δ_{2000} Mag. Observer
Oct. 1.66584 1^{h}36^{m}03.^{s}44 −49^{o}02′28′′.3  Drinkwater
4.46701 1 40 40.20 −47 31 30.8 16 McNaught
4.48155 1 40 41.34 −47 31 03.3  _{”}
4.48538 1 40 41.62 −47 30 53.7  _{”}
4.56782 1 40 45.52 −47 28 05.3  16.5 Gilmore
4.57263 1 40 45.86 −47 27 55.1  _{”}
5.39693 1 42 03.55 −46 58 59.9  McNaught
5.52870 1 42 12.94 −46 54 41.6  _{”}
5.78333 1 42 28.71 −46 45 26.9  _{”}
6.54638 1 43 37.86 −46 18 03.1  _{”}
6.54826 1 43 37.97 −46 17 59.1  _{”}

M. J. Drinkwater and R. H. McNaught (Siding Spring). Observations on Oct. 4 and 5 with the Uppsala Southern Schmidt, on Oct. 6 with the 1.0-m reflector (+ CCD). Measures by McNaught. V magnitude.

A. C. Gilmore and P. M. Kilmartin (Mt. John University Observatory). Orbital elements by G. V. Williams, Center for Astrophysics:

T = 1992 Sept.28.204 TT  ω = 275.^{o}338
e = 0.29011  Ω = 88.811 }2000.0
q = 1.10679 AU  i = 7.037

a = 1.55911 AU n^{o} = 0.506278 P = 1.95 years

1992TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
Oct. 5 1^{h}41.^{m}41 −47^{o}13.^{′}1 0.168 1.108 126.^{o}5 46.^{o}5 15.6
10 1 47.93 −44 04.5 0.170 1.112 128.2 44.9 15.6
15 1 52.96 −40 28.5 0.172 1.117 130.4 42.8 15.6
20 1 56.79 −36 28.8 0.176 1.123 133.0 40.4 15.6
25 1 59.77 −32 09.5 0.182 1.131 135.7 37.9 15.6
30 2 02.27 −27 36.2 0.189 1.141 138.4 35.3 15.6
Nov. 4 2 04.63 −22 56.3 0.198 1.152 140.8 33.0 15.7
9 2 07.09 −18 17.3 0.210 1.165 142.7 31.1 15.8
14 2 09.78 −13 46.4 0.225 1.178 143.8 29.7 15.9

1992 October 6 Daniel W. E. Green