Central Bureau for Astronomical Telegrams
IAUC 5194: 1991 DB; 1990c
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Circular No. 5194
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
1991 DB
E. F. Helin and K. Lawrence report their discovery of a fast-
moving asteroidal object on films taken by Helin, Lawrence, and P.
Rose with the Palomar 0.46-m Schmidt telescope:
1991 UT R.A. (1950) Decl. Mag.
Feb. 18.38698 10 07 32.12 + 1 14 47.4 17.0
18.41285 10 07 33.22 + 1 15 47.9
19.43333 10 08 30.22 + 1 58 24.5
20.35451 10 09 25.71 + 2 39 19.2
20.38606 10 09 27.07 + 2 40 43.8
Preliminary elements by G. V. Williams, Center for Astrophysics:
T = 1991 Apr. 17.968 ET Peri. = 50.684
e = 0.46629 Node = 157.765 1950.0
q = 1.03433 AU Incl. = 12.908
a = 1.93800 AU n = 0.365320 P = 2.70 years
1991 ET R.A. (1950) Decl. Delta r V
Feb. 13 10 03.24 - 1 47.6 0.276 1.254 17.0
18 10 07.20 + 0 59.7
23 10 12.34 + 4 50.8 0.210 1.198 15.9
28 10 19.44 +10 01.8
Mar. 5 10 29.56 +16 49.1 0.159 1.148 15.5
10 10 44.35 +25 21.6
15 11 06.43 +35 23.4 0.129 1.105 15.6
20 11 39.95 +45 56.6
25 12 30.57 +55 22.5 0.124 1.070 16.0
COMET LEVY (1990c)
H. Fukushima, National Astronomical Observatory of Japan,
reports that an exposure on TP2415 film with a 300-mm telephoto lens
on Feb. 9.78 UT shows an anti-tail 2.7 deg long in p.a. 153 deg; the
main plasma tail was < 20' long.
1991 February 21 (5194) Daniel W. E. Green
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