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IAUC 5054: 1990R; 1990N, 1990O, 1990P; 1990 MF

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IAUC number 

                                                  Circular No. 5054
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


SUPERNOVA 1990R IN UGC 11699
     J. Mueller reports her discovery of a supernova (mag about
17.5) in UGC 11699 (R.A. = 21h09m.9, Decl. = +12 24', equinox
1950.0).  The supernova, located 10".1 east of the galaxy's center,
was found on a blue plate exposed on June 26 UT with the 1.2-m
Oschin Telescope in the course of the second Palomar Sky Survey.
A. V. Filippenko and J. C. Shields, University of California,
Berkeley, report that CCD spectra (range 390-980 nm, resolution
1-2 nm), obtained on July 17 UT with the Shane 3-m reflector at
Lick Observatory, show SN 1990R to be of type Ia, probably 1-2
months past maximum brightness.


SUPERNOVAE 1990N, 1990O, 1990P
   Filippenko and Shields also confirm that SN 1990N and SN 1990O
(IAUC 5039) are of type Ia.  SN 1990P (IAUC 5039), however, could
not be seen to a limiting R magnitude of approximately 20.


1990 MF
     The following ephemeris continues that on IAUC 5050.  It is
noted that the object attains a maximum phase angle of 128.0 deg
on July 20.

     1990 ET      R.A. (1950) Decl.     Delta      r        V
     July 22     4 43.75    +51 23.5
          24     4 42.57    +47 28.9    0.074    0.970    16.6
          26     4 42.23    +44 23.1
          28     4 42.43    +41 53.2    0.093    0.961    16.7
          30     4 43.04    +39 49.9
     Aug.  1     4 43.96    +38 07.0    0.112    0.955    16.8
           3     4 45.15    +36 40.0
           5     4 46.55    +35 25.5    0.131    0.951    16.8
           7     4 48.14    +34 21.1
           9     4 49.89    +33 24.9    0.150    0.950    16.8
          11     4 51.78    +32 35.4
          13     4 53.78    +31 51.6    0.169    0.951    16.8
          15     4 55.88    +31 12.4
          17     4 58.04    +30 37.2    0.188    0.955    16.8


1990 July 18                   (5054)             Daniel W. E. Green

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