Circular No. 5806

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)

1993 KH R. H. McNaught, Anglo-Australian Observatory, reports his discovery

of a fast-moving asteroidal object on exposures with the U.K. Schmidt. The following precise positions are available:

1993 UT α_{2000} δ_{2000} V Observer
May 24.50889 14^{h}10^{m}38.^{s}13 −17^{o}13′11′′.0 17.5 Savage
24.54708 14 10 27.60 −17 14 07.1  _{”}
26.49825 14 01 56.10 −18 01 56.8  Hartley
26.51214 14 01 52.24 −18 02 17.7  _{”}
28.20034 13 54 27.42 −18 44 39.0  Scotti
28.21053 13 54 24.60 −18 44 53.7 17.7  _{”}
28.22106 13 54 21.67 −18 45 09.2 17.8  _{”}
28.35740 13 53 47.47 −18 47 56.2  Hartley

A. Savage and M. Hartley (Siding Spring). U.K. Schmidt telescope. Poor

image in bad seeing on May 24. Measurer McNaught. J. V. Scotti (Kitt Peak). 0.9-m Spacewatch telescope.

Preliminary orbital elements from the above observations:

T = 1993 Sept. 4.613 TT  ω = 293.^{o}486
e = 0.30934  Ω = 54.574 }2000.0
q = 0.85110 AU  i = 12.680

a = 1.23231 AU n^{o} = 0.720486 P = 1.37 years

1993TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
May 13 14^{h}57.^{m}06 −12^{o}55.^{′}0 0.290 1.299 172.^{o}3 6.^{o}0 17.4
18 14 38.04 −14 40.6 0.272 1.276 164.5 12.2 17.4
23 14 17.17 −16 36.8 0.259 1.253 155.5 19.6 17.5
28 13 55.34 −18 39.2 0.250 1.229 146.0 27.4 17.7
June 2 13 33.51 −20 43.4 0.245 1.205 136.7 35.3 17.8
7 13 12.49 −22 46.0 0.244 1.180 127.7 42.9 18.0
12 12 52.83 −24 44.9 0.245 1.155 119.3 50.1 18.1
17 12 34.85 −26 39.8 0.247 1.130 111.4 56.8 18.3
22 12 18.55 −28 31.2 0.251 1.105 104.2 63.1 18.5
27 12 03.68 −30 20.0 0.254 1.080  97.5 69.0 18.6
July 2 11 49.80 −32 06.3 0.258 1.055  91.4 74.5 18.8

1993 May 28 Daniel W. E. Green