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IAUC 4504: RZ Leo; N Vul 1987; 1987d1

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                                                  Circular No. 4504
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


RZ LEONIS
     G. M. Hurst, Basingstoke, England, reports that S. Lubbock,
Bridgend, Wales, has detected an outburst of this star (cf. IAUC
4026, 4027).  Visual magnitude estimates: Nov. 28.236 UT, 12.5
(Lubbock); 28.246, 12.3 (Lubbock); 28.270, 12.3 (Hurst); 28.735,
12.7 (R. H. McNaught, Coonabarabran, N.S.W.).


NOVA VULPECULAE 1987
     A. R. Klemola, Lick Observatory, has measured the following
precise position from exposures on a Lick astrograph yellow plate:
R.A. = 19h02m32s.151, Decl. = +21 41'39".18 (equinox 1950.0, epoch 1987.88,
uncertainty +/- 0".15).  He suggests that the prenova may be a star
of B = 19 on the Palomar Sky Survey at R.A. = 19h02m32s.120, Decl. =
+21 41'39".05 (equinox 1950.0, epoch 1950.46, uncertainty +/- 0".2 to
0".3); this star appears to be blue.


COMET ICHIMURA (1987d1)
     Parabolic orbital elements from MPC 12575:

          T = 1988 Jan. 10.100 ET    W = 329.317
                                     O = 225.800   1950.0
          q =   0.19951 AU           i =  41.564

     1987 ET      R.A. (1950) Decl.     Delta      r       m1
     Nov. 28     3 13.57    -34 37.8
          29     3 02.10    -37 46.4    0.307    1.165     7.6
          30     2 49.22    -40 55.6
     Dec.  1     2 34.73    -44 02.3    0.300    1.123     7.4
           2     2 18.48    -47 03.1
           3     2 00.30    -49 54.3    0.298    1.081     7.2
           4     1 40.09    -52 32.1
           5     1 17.85    -54 52.9    0.303    1.039     7.1
           6     0 53.72    -56 53.5
           7     0 28.01    -58 31.8    0.313    0.996     7.0
           8     0 01.22    -59 46.4
           9    23 34.01    -60 37.2    0.328    0.952     6.9
          10    23 07.07    -61 05.5
          11    22 41.07    -61 13.3    0.347    0.907     6.8
          12    22 16.53    -61 03.6
          13    21 53.77    -60 39.5    0.370    0.861     6.7


1987 November 28               (4504)              Brian G. Marsden

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