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IAUC 4778: 1989K; S Aps; 1989 FB

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IAUC number 

                                                  Circular No. 4778
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 1989K IN NGC 5375
     C. Brewer reports the discovery by J. Mueller and herself,
on a red plate taken May 4.20 UT with the 1.2-m Oschin Schmidt
Telescope in the course of the Second Palomar Sky Survey, of
a mag 17.5 supernova in NGC 5375 (= UGC 08865 = MCG +5-33-27).
The SN is located 65" east and 10" north of the galaxy center, at
R.A. = 13h54m35s, Decl. = +29 25.0 (equinox 1950.0).  Confirmation
of the SN was made by A. Dressler and J. Gunn on May 9 with the
Hale 5-m reflector (+ 4-shooter spectrograph); the spectral features
indicate that the object is a type-II supernova, about 100 days
after maximum:  strong H-alpha, weak Na D, and the infrared Ca
triplet with P Cyg profiles.


S APODIS
     W. A. Lawson, P. M. Kilmartin and A. C. Gilmore, Mount
John University Observatory, report a fading of the R CrB-type
variable S Aps, as indicated by the following photometry:
Apr. 4.47 UT, V = 9.56, B-V = +1.20; Apr. 19.54, 9.78, +1.22;
Apr. 27.56, 9.83, +1.22; May 5.65, 10.04, +1.24; May 7.31, 10.12,
+1.26; May 8.42, 10.19, +1.27.


1989 FB
     Ephemeris extension to IAUC 4770:

     1989 ET      R.A. (1950) Decl.     Delta      r       V
     May  14    11 00.81    - 7 44.0    0.354    1.209    16.8
          19    10 55.02    - 9 13.6
          24    10 51.19    -10 42.0    0.388    1.177    17.1
          29    10 49.02    -12 09.7
     June  3    10 48.23    -13 37.2    0.420    1.142    17.4
           8    10 48.59    -15 05.1
          13    10 49.87    -16 33.7    0.445    1.103    17.6
          18    10 51.86    -18 03.0
          23    10 54.38    -19 33.0    0.462    1.062    17.7
          28    10 57.28    -21 03.4
     July  3    11 00.43    -22 34.0    0.469    1.018    17.8
           8    11 03.68    -24 04.4
          13    11 06.84    -25 33.9    0.464    0.974    17.9


1989 May 10                    (4778)             Daniel W. E. Green

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