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IAUC 3878: 1983 TB; SNe; N Tri 1983

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                                                  Circular No. 3878
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 617-864-5758


1983 TB
     S. Green, University of Leicester, reports that a fast-moving
object has been discovered with the Infrared Astronomy Satellite
as shown below.  Optical confirmation, showing the object to be of
asteroidal appearance, has been made by C. Kowal at Palomar.

     1983 UT           R.A. (1950.0) Decl.    Mag.    Observer

     Oct. 11.06869    17 26.86    +59 30.5    15.5    IRAS
          11.14027    17 28.60    +59 29.9              "
          11.28340    17 31.82    +59 27.8              "
          11.42656    17 35.15    +59 25.7              "
          11.56972    17 38.31    +59 22.8              "
          12.242      17 53.4     +59 08      16      Kowal
          13.130      18 12.5     +58 44                "


SUPERNOVAE
     R. Kirshner, University of Michigan, reports that spectra
taken by R. Fesen and himself with the 4-m telescope at Kitt Peak
National Observatory on Oct. 13 show that the supernova in MCG
6-36-55 (cf. IAUC 3873) is real and of type I, about one month
past maximum light.  The supernova in IC 1731 (IAUC 3875) is also
of type I and less than 20 days past maximum.  The supernova in
NGC 1448 (IAUC 3877), observed at 4.4 airmasses, shows strong H-alpha
and appears to be of type II.

     F. Ciatti and S. Ortolani, Asiago Astrophysical Observatory,
telex that a grating spectrogram (dispersion 120 A/mm) on Oct.
12.0 UT shows the IC 1731 supernova to be a type I supernova some
15-20 days past maximum.  Broad emission bands are centered at
434, 466 (strong), 484, 497, 530 (strong) and 593 nm, while the
typical absorption feature appears at 616 nm.

     C. Pollas, CERGA, informs us that the supernova in MCG
6-36-55 was observed at V ~ 17.4 on Oct. 8.86 UT.


NOVA TRIANGULI 1983
     R. W. Argyle, Royal Greenwich Observatory, communicates the
following precise position of this object (IAUC 3869) by King: R.A. =
2h42m14s60, Decl. = +33deg18'48" 6 (equinox 1950.0).  On Oct. 8.00 UT
the photographic magnitude was 16.5.


1983 October 14                (3878)              Brian G. Marsden

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