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IAUC 4903: 1989z; 1988ac; NSV 01098

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                                               Circular No. 4903
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


PERIODIC COMET SANGUIN (1989z)
     B. Weller, Cerro Tololo Interamerican Observatory; R. Coker,
California Institute of Technology; and K. Meech, Institute for
Astronomy, report their recovery of this comet from observations
made with the CTIO Schmidt telescope using a prototype CCD camera.
The comet appeared stellar on all three nights of observation.
The following observations indicate a correction to the prediction
on MPC 12125 of Delta(T) = -0.37 day:

     1989 UT             R.A. (1950) Decl.        m2
     May   9.29708   16 34 38.23   + 0 34 56.3    22
          10.24201   16 34 05.84   + 0 41 08.0
          11.25027   16 33 30.58   + 0 47 44.3


SUPERNOVA 1988ac IN NGC 3995
     M. Richmond reports his discovery, using the Lick Observatory
Nickel 1-m telescope (+ CCD), of a supernova in NGC 3995 (R.A. =
11h55m10s, Decl. = +32 34'.3, equinox 1950.0).  The object is located
17".3 west and 34".1 south of the galaxy's center and is superimposed
on an H II region in the galaxy's southern arm.  Unfiltered magnitudes
(+/- 0.2 mag):  1988 Dec. 15 UT, [19; Dec. 30, 16.5; 1989 Jan. 15,
16.8; Jan. 29, 17.3; Mar. 15, 18.0?; Apr. 29, 18.3?  The final two
magnitudes are questionable due to interfering light from the
surrounding H II region.  A spectrum (range 390-710 nm, resolution
1-2 nm) of the location of the supernova was obtained on 1989 Nov.
8 by A. V. Filippenko and J. C. Shields, University of California at
Berkeley, using a CCD spectrograph on the Shane 3-m reflector at
Lick Observatory; no features directly attributable to a year-old
supernova were detected among the blue continuum and strong emission
lines of the underlying H II region.


NSV 01098
     Visual magnitude estimates (cf. IAUC 4764):  Apr. 24.89, 10.9
(P. Schmeer, Bischmisheim, W. Germany); Aug. 4.13, [12.5 (A. Pereira,
Cabo da Roca, Portugal); Oct. 8.55, [13.2 (M. Iida, Nagano, Japan);
23.59, 13.0 (M. Koshiro, Suwa, Japan); 24.17, 12.6 (A. Pereira, Cabo
da Roca, Portugal); 24.53, 13.0 (Iida); 30.17, 11.7 (Pereira);
Nov. 3.86, 11.6 (Pereira); 9.24, 1.4 (Pereira).


1989 November 10               (4903)             Daniel W. E. Green

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