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IAUC 4506: 1987f1; RZ Leo; 1987A

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                                                  Circular No. 4506
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


COMET FURUYAMA (1987f1)
     Parabolic orbital elements from MPC 12575:

          T = 1988 Mar. 2.415 ET     W = 232.953
                                     O = 250.063   1950.0
          q =   1.69121 AU           i = 117.851

     1987/88 ET   R.A. (1950) Decl.     Delta      r       m1
     Dec.  1     4 36.93    +18 29.7    1.089    2.073     9.9
           6     4 12.22    +13 48.1
          11     3 48.09    + 8 53.4    1.061    2.003     9.6
          16     3 25.49    + 4 04.4
          21     3 05.12    - 0 22.9    1.127    1.938     9.6
          26     2 47.32    - 4 18.6
          31     2 32.17    - 7 39.9    1.262    1.879     9.7
     Jan.  5     2 19.51    -10 28.6
          10     2 09.11    -12 48.7    1.435    1.826     9.9
          15     2 00.70    -14 45.0
          20     1 54.02    -16 21.9    1.622    1.781    10.1

     Total visual magnitude estimates: Nov. 28.48 UT, 10.0 (D.
Levy, Tucson, AZ, 0.4-m reflector); 29.44, 10.7 (A. Hale, Las
Cruces, NM, 0.41-m reflector); Dec. 1.28 UT, 10.0 (R. A. Keen, Mt.
Thorodin, CO, 0.15-m reflector).
     Corrigenda.  IAUC 4502, line 3, for 21.79074 read 21.78021;
line 16, add S. Hayakawa (YGCO Hoshikawa and Nagano Stations).


RZ LEONIS
     Visual magnitude estimates communicated by J. Mattei, AAVSO:
Nov. 25, [12.5 (J. Isles, Limassol, Cyprus); Dec. 1.238 UT, 12.7
(S. Lubbock, Bridgend, Wales).  Mattei notes that this does not
appear to be a recurrent nova (as listed in the 4th edition of the
Variable Star Catalogue) but some sort of long-period dwarf nova.


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     Visual magnitude estimates: Nov. 25.44, 6.0 (D. Seargent, The
Entrance, N.S.W.); 26.55, 5.8 (R. H. McNaught, Coonabarabran,
N.S.W.); 28.42, 6.1 (Seargent); 29.44, 6.0 (A. C. Beresford,
Adelaide, South Australia); 30.44, 6.0 (Beresford); Dec. 1.48, 6.1
(Beresford); 2.44, 6.1 (Seargent); 3.50, 5.9 (McNaught).


1987 December 3                (4506)              Brian G. Marsden

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