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IAUC 5693: 1993A, 1993B; 1992q

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                                                  Circular No. 5693
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


SUPERNOVAE 1993A AND 1993B IN ANONYMOUS GALAXIES
     J. Maza, University of Chile (UC); and M. Hamuy, Cerro Tololo
Interamerican Observatory, report the discovery of two supernovae
on 20-min IIa-O exposures taken by G. Valladares with the CTIO
Curtis Schmidt telescope.  SN 1993A, at mpg about 18.5 on Jan.
17.17 UT, was discovered by M. Wischnjewsky (UC) and is located
5".5 west and 3".5 south of the nucleus of a galaxy at R.A. =
7h38m38s.4, Decl. = -61 56'11" (equinox 1950.0); the supernova was
not visible (mpg > 20) on a IIIa-J plate taken on 1992 Dec. 29.
Confirmation of SN 1993A was made by C. Anguita (UC) with a CCD V
image obtained on Jan. 20.24 with the CTIO 1.5-m telescope.
     SN 1993B, at mpg about 18 on Jan. 17.22, was discovered by R.
Antezana (UC) and is located about 1" east and 5" north of the
nucleus of a spiral galaxy at R.A. = 10h32m35s.1, Decl. = -34 11'03";
SN 1993B was not visible (mpg > 19) on a IIa-O plate taken on 1992
Dec. 27.  Anguita also confirmed SN 1993B on CCD B and V frames
obtained on Jan. 20.30.


COMET HELIN-LAWRENCE (1992q)
     Ephemeris extension from orbital elements on MPC 21235:

1993 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Jan. 13    23 08.11   -53 25.3   2.646   2.162   50.7   20.6   14.0
     23    23 14.25   -53 49.8   2.662   2.126   47.6   20.0   13.9
Feb.  2    23 23.17   -54 25.2   2.652   2.095   46.3   19.9   13.8
     12    23 34.86   -55 14.6   2.617   2.071   46.8   20.3   13.8
     22    23 49.58   -56 20.9   2.559   2.054   49.2   21.4   13.7
Mar.  4     0 07.92   -57 47.2   2.479   2.043   53.0   22.8   13.6
     14     0 30.96   -59 35.3   2.383   2.038   58.0   24.4   13.5
     24     1 00.63   -61 45.1   2.275   2.041   63.8   26.0   13.4
Apr.  3     1 40.04   -64 11.1   2.163   2.051   70.1   27.3   13.3
     13     2 33.84   -66 34.9   2.054   2.067   76.6   28.2   13.2
     23     3 46.59   -68 15.9   1.961   2.089   82.9   28.5   13.2
May   3     5 15.44   -68 10.9   1.893   2.118   88.3   28.4   13.1
     13     6 43.96   -65 34.2   1.861   2.153   92.3   28.0   13.2
     23     7 56.30   -60 45.4   1.874   2.193   94.1   27.4   13.3
June  2     8 50.22   -54 47.8   1.934   2.239   93.6   26.9   13.4


1993 January 21                (5693)            Daniel W. E. Green

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