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IAUC 4430: Poss. COMET; V394 CrA; N Her 1987

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IAUC number 

                                                  Circular No. 4430
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


POSSIBLE COMET
     W. Landgraf, University of Gottingen, reports his discovery of
a possible comet (three images) on a plate taken with the GPO
astrograph at the European Southern Observatory on June 25.0 UT.  The
object is diffuse with a stellar condensation.  A more questionable
single image has also been found on an earlier exposure.

       1987 UT             R. A.  (1950)  Decl.         m1
       June 22.06319    11 21 20.2     +12 32 47
            24.99062    11 21 20.08    +12 42 44.1      14
            25.00040    11 21 20.10    +12 42 46.4


V394 CORONAE AUSTRINAE
     S. R. Heathcote, A. Gomez, and R. E. Williams, Cerro Tololo
Interamerican Observatory, telex:  "Spectra obtained with the CTIO
1-m telescope on Aug. 4, 5, and 6 show broad emission from the
Balmer lines, He I, and He II (468.6 nm), together with unusually
strong recombination lines of N II (500.5, 567.9, and 517.8 nm).
The spectra indicate that the nova was discovered past maximum and
that it may be extremely rich in nitrogen."
     M. Suzuki reports (via H. Kosai, Tokyo Astronomical Observatory)
that an exposure on Tri-X film (35-mm camera, no filter) taken
July 29.46 UT shows the nova at mpv approximately 7.
     Further visual magnitude estimates:  Aug. 5.56 UT, 10.4 (D. A.
J. Seargent, The Entrance, N.S.W.); 6.42, 11.4 (R. H. McNaught,
Siding Spring Observatory); 7.39, 11.7 (McNaught); 7.54, 12.1
(McNaught); 8.45, 12.1 (Seargent).  Corrigendum:  On IAUC 4428 and
4429, for  V394 CORONA AUSTRINAE  read  V394 CORONAE AUSTRINAE


NOVA HERCULIS 1987
     R. H. McNaught, Siding Spring Observatory, reports the following
precise position obtained from a Tri-X exposure at the Uppsala
Southern Schmidt telescope on July 31.54 UT:  R.A. = 18h41m26.70, Decl. =
+15 16'12.3 (equinox 1950.0; uncertainty 0".5); the nova was then at
mpv = 12.8.  He has also identified a very blue star at this location
on the Palomar Sky Survey exposure for 1951 July 12, and has
calculated the following approximate magnitudes from image
diameters: blue exposure, 17.5; red exposure, 18.5.


1987 August 10                 (4430)            Daniel W. E. Green

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