Central Bureau for Astronomical Telegrams
IAUC 5275: (878)
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Circular No. 5275
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 or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
(878) MILDRED
G. V. Williams, Center for Astrophysics, has identified this minor
planet, lost since its discovery opposition of 1916, with single-night
observations made in 1985 and 1991. A trio of positions on 1991 Apr. 10
was identified in E. W. Elst's survey with the 1.0-m Schmidt at the
European Southern Observatory. The 1985 Nov. 11 observation is the second
of a pair obtained two days apart by L. V. Zhuravleva with the 0.4-m
astrograph at the Crimean Astrophysical Observatory and given the single
designation 1985 VV2 on MPC 12273 in 1987. Further confirmation of the
identification has been obtained in consultation with R. H. McNaught,
who had already marked the faint image on a single exposure by M. R. S.
Hawkins with the 1.2-m U.K. Schmidt on 1984 Apr. 25 as a possible
candidate for (878). The following orbit by Williams satisfies 18
positions 1916-1991 (the 1916 positions being remeasurements by J.
Gibson in 1987 of the original plates obtained by S. B. Nicholson and H.
Shapley with the 1.5-m Mt. Wilson reflector) with a mean residual of 0".7:
Epoch = 1991 Dec. 10.0 ET
T = 1992 Oct. 21.4784 ET Peri. = 189.5634
e = 0.227893 Node = 172.3001 1950.0
q = 1.822025 AU Incl. = 2.0651
a = 2.359808 AU n = 0.2718874 P = 3.625 years
1991 ET R.A. (1950) Decl. Delta r V
Mar. 5 13 42.53 - 9 31.4 2.082 2.880 19.6
15 13 37.86 - 8 56.1
25 13 31.03 - 8 08.1 1.914 2.868 19.1
Apr. 4 13 22.62 - 7 10.8
14 13 13.44 - 6 09.1 1.852 2.853 18.7
24 13 04.43 - 5 09.2
May 4 12 56.53 - 4 17.1 1.904 2.835 19.2
14 12 50.41 - 3 37.2
24 12 46.52 - 3 12.5 2.052 2.813 19.6
June 3 12 44.99 - 3 03.6
13 12 45.80 - 3 10.1 2.261 2.789 19.9
23 12 48.79 - 3 30.7
July 3 12 53.74 - 4 03.7 2.498 2.761 20.1
1991 May 25 (5275) Brian G. Marsden
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