Central Bureau for Astronomical Telegrams

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IAUC 4423: 1986J; 1987A; N Her 1987; 1987o

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                                                  Circular No. 4423
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


SUPERNOVA 1986J IN NGC 891
     S. Kent and R. Schild, Center for Astrophysics, write:  "We
have made a prediscovery detection of SN 1986J in NGC 891 from CCD
images obtained on 1983 Dec. 29 using the Whipple Observatory 0.61-
m telescope.  This detection predates the earliest detection of
Rupen et al. (1987, A.J. 94, 61) by 7 days.  Images were obtained
in 3 filters which are broadened versions of the Thuan-Gunn gri
bands.  The seeing was 4" with variable overcast.  The SN was
detected in the r band and has a brightness about equal to that of
another star 52" due west.  It was only marginally seen in the i
band and not at all at g.  These observations are consistent with
those of Rupen et al. for 1984 Jan. 6-7 and suggest that the
spectrum was dominated by H-alpha emission at that time."


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     Visual magnitude estimates:  July 17.54 UT, 4.7 (D. A. J.
Seargent, The Entrance, N.S.W.); 19.46, 4.6 (A. C. Beresford,
Adelaide, S. Australia); 20.83, 4.6 (R. H. McNaught, Siding Spring
Observatory); 21.47, 4.5 (Beresford).


NOVA HERCULIS 1987
     Photoelectric photometry by R. Monella, Covo, Italy:  June
15.912 UT, V = 11.88, B-V = +0.42, U-B = -0.92; 17.906, 11.94,
+0.48, -0.86; 19.924, 11.96, +0.41, -0.96.


COMET SHOEMAKER (1987o)
     Ephemeris extension from orbital elements on MPC 12 008:

     1987 ET     R. A. (1950) Decl.     Delta      r       m1
     July 24    15 22.95    +14 48.7    5.464    5.754    16.8
     Aug.  3    15 18.36    +14 45.9
          13    15 15.16    +14 37.5    5.827    5.801    17.0
          23    15 13.24    +14 25.6
     Sept. 2    15 12.48    +14 12.0    6.177    5.852    17.1
          12    15 12.75    +13 58.3
          22    15 13.91    +13 45.9    6.479    5.906    17.3
     Oct.  2    15 15.82    +13 36.1
          12    15 18.35    +13 30.0    6.706    5.962    17.4


1987 July 21                   (4423)            Daniel W. E. Green

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