Circular No. 5821

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 MF

E. F. Helin reports the discovery by herself and K. Lawrence of a fastmoving asteroidal object. The following positions are available:

1993 UT  α_{2000}  δ_{2000}  Mag. Observer
June 22.42674 20^{h}13^{m}08.^{s}28 +3^{o}04′37′′.2  13  Helin
22.45694 20 13 13.50 +3 06 16.6  _{”}
24.29080 20 18 40.71 +4 49 35.0  _{”}
24.45434 20 19 07.82 +4 59 01.8  _{”}
25.33785 20 21 49.75 +5 50 01.8  13.7 Rogers
25.34618 20 21 51.15 +5 50 30.5  _{”}
25.36363 20 21 54.14 +5 51 29.8  _{”}
25.36814 20 21 55.00 +5 51 47.6  _{”}
25.37439 20 21 55.99 +5 52 07.4  _{”}
25.39663 20 21 59.85 +5 53 26.1  _{”}
25.58553 20 22 35.17 +6 04 59.4  McNaught

E. Helin, K. Lawrence, M. Nassir, and W. Johnson (Palomar). 0.46-m

Schmidt telescope films measured by Lawrence. J. E. Rogers (Camarillo, CA). 0.25-m Schmidt-Cassegrain + CCD (V). R. H. McNaught and G. Garradd (Siding Spring). Measured by McNaught.

Very preliminary orbital elements by G. V. Williams, SAO:

T = 1993 Aug. 3.907 TT  ω = 78.^{o}083
e = 0.58356  Ω = 241.031 }2000.0
q = 1.14293 AU  i = 8.441

a = 2.74452 AU n^{o} = 0.216773 P = 4.55 years

1993TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
June 22 20^{h}11.^{m}90 + 2^{o}41.^{′}3 0.296 1.256 139.^{o}2 32.^{o}0 13.7
24 20 17.78 + 4 33.2 0.287 1.246 138.4 32.8 13.7
26 20 23.84 + 6 28.9 0.279 1.237 137.4 33.8 13.6
28 20 30.10 + 8 27.8 0.272 1.228 136.4 34.8 13.6
30 20 36.56 +10 29.4 0.265 1.219 135.3 35.9 13.5
July 2 20 43.24 +12 33.1 0.259 1.211 134.0 37.1 13.5
4 20 50.13 +14 38.1 0.254 1.204 132.7 38.3 13.5
6 20 57.24 +16 43.7 0.249 1.196 131.4 39.6 13.4
8 21 04.57 +18 49.0 0.245 1.189 130.0 40.9 13.4

1993 June 25 Daniel W. E. Green