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IAUC 5070: 1990 OL; 1990c

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                                                  Circular No. 5070
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


1990 OL
     Further precise positions measured by C. M. Olmstead from
photographs taken at Palomar by H. E. Holt, H. R. Holt, and D. H.
Levy:

     1990 UT             R.A. (1950) Decl.       Mag.
     July 27.36250   21 31 34.58   + 1 43 05.9
          27.39340   21 31 35.56   + 1 42 26.3
          29.34497   21 32 43.10   + 0 55 20.7   17.0
          29.37857   21 32 43.94   + 0 54 36.0
          30.42382   21 33 18.03   + 0 28 14.0   17.0

     Improved orbital elements by E. Bowell, Lowell Observatory:

     T = 1990 July 20.279 ET          Peri. = 154.783
     e = 0.46016                      Node  = 150.459   1950.0
     q = 1.47207 AU                   Incl. =  14.867
       a =  2.72685 AU     n = 0.218884     P =   4.50 years

     1990 ET      R.A. (1950) Decl.     Delta      r       V
     July 28    21 31.95    + 1 28.3    0.493    1.474    16.2
     Aug.  7    21 36.94    - 3 00.4
          17    21 40.82    - 8 06.4    0.485    1.496    15.7
          27    21 44.60    -13 08.2
     Sept. 6    21 49.41    -17 26.6    0.553    1.541    16.4
          16    21 55.91    -20 40.1
          26    22 04.40    -22 44.3    0.693    1.605    17.3
     Oct.  6    22 14.88    -23 46.0
          16    22 26.99    -23 56.5    0.889    1.685    18.1


COMET LEVY (1990c)
     Total visual magnitude estimates (cf. IAUC 5067):  July 29.00
UT, 6.3 (H. Mikuz, Ljubljana, Yugoslavia, naked eye); 31.45, 6.1 (A.
Hale, Las Cruces, NM, naked eye); Aug. 1.00, 6.1 (R. Goncalves,
Caxias, Portugal, 7x50 binoculars); 2.31, 6.1 (J. E. Bortle,
Stormville, NY, 10x50 binoculars; 2 deg tail in p.a. 241 deg);
3.35, 5.7 (J. V. Scotti, Tucson, AZ, 10x50 binoculars); 5.70, 5.7
(M. Ohkuma, Tokyo, Japan, 11x80 binoculars).


1990 August 7                  (5070)             Daniel W. E. Green

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