Circular No. 5648

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 UB R. H. McNaught reports his discovery of a fast-moving asteroidal object

on a U.K. Schmidt Telescope plate taken by M. Hartley. Following his own observations with the Uppsala Schmidt telescope, McNaught identified a pre-discovery image on a UKST I plate taken by A. Savage.

1992 UT α_{2000} δ_{2000} V Observer
Sept. 5.67206 2^{h}04^{m}01.^{s}14 −47^{o}10′51′′.5  Savage
5.73456 2 04 07.85 −47 10 40.8  _{”}
Oct. 21.62744 2 30 57.81 −30 55 45.4 16 Hartley
21.65522 2 30 56.76 −30 54 41.2  _{”}
22.55515 2 30 29.62 −30 16 33.7  McNaught
23.53218 2 29 58.98 −29 34 29.5  _{”}
25.62188 2 28 50.75 −28 02 11.9  _{”}
26.49213 2 28 23.50 −27 22 51.5  _{”}
27.43889 2 27 53.01 −26 39 29.7  _{”}

Orbital elements by G. V. Williams, Harvard-Smithsonian Center for Astrophysics, from 8 of the above observations:

T = 1992 Sept.26.7752 TT  ω = 290.^{o}7269
e = 0.582856  Ω = 74.3666 }2000.0
q = 1.280082 AU  i = 15.9519
a = 3.068678 AU n^{o} = 0.1833484 P = 5.376 years
1992/93 α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
Nov. 4 2^{h}24.^{m}02 −20^{o}38.^{′}3 0.420 1.354 143.^{o}8 25.^{o}6 15.9
9 2 22.00 −16 31.8 0.437 1.373 145.4 24.2 16.0
14 2 20.59 −12 26.9 0.459 1.394 146.2 23.3 16.1
19 2 19.89 − 8 29.4 0.486 1.417 145.9 23.0 16.3
24 2 19.97 − 4 43.7 0.518 1.442 144.8 23.3 16.5
29 2 20.90 − 1 12.6 0.555 1.468 142.9 23.9 16.7
Dec. 4 2 22.65 + 2 02.3 0.597 1.495 140.4 24.8 16.9
9 2 25.21 + 5 00.5 0.644 1.524 137.6 25.8 17.1
14 2 28.52 + 7 42.4 0.695 1.553 134.6 26.8 17.4
19 2 32.52 +10 09.2 0.750 1.584 131.4 27.8 17.6
24 2 37.17 +12 22.0 0.809 1.615 128.2 28.6 17.8
29 2 42.42 +14 22.3 0.872 1.647 125.0 29.3 18.1
Jan. 3 2 48.22 +16 11.3 0.939 1.680 121.8 29.8 18.3

1992 November 4 Daniel W. E. Green