Central Bureau for Astronomical Telegrams

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IAUC 4749: 1989i; 1987A

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                                                  Circular No. 4749
Central Bureau for Astronomical Telegrams
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

     R. H. McNaught, Siding Spring Observatory, reports that
Quentin A. Parker and Malcolm Hartley have discovered a comet on an
R plate taken by Parker with the 1.2-m U.K. Schmidt Telescope.
The following positions are available:

     1989 UT             R.A. (1950) Decl.        m1    Observer
     Mar.  2.53721   10 40 44.30   + 1 00 49.3   16.5   Parker
           2.58929   10 40 42.33   + 1 01 01.2            "
           3.48      10 40.1       + 1 04               Gilmore

Q. A. Parker and M. Hartley (Siding Spring).  Measurer R. H. McNaught.
   Object condensed with a 6' tail in p.a. 295 deg.  The second image
   is involved with a star.
A. C. Gilmore and P. M. Kilmartin (Mt. John University Observatory).

     M. Karovska, P. Nisenson, C. Papaliolios, and C. Standley,
Center for Astrophysics; and S. Heathcote, Cerro Tololo Interamerican
Observatory, write:  "Observations performed on 1988 Dec. 20 with
the CTIO 4-m telescope, the PAPA detector, and speckle image
reconstruction techniques show a source located 0".85 +/- 0".05
from SN 1987A at position angle 200 +/- 5 deg.  The magnitude
difference of this source from the SN is approximately 2.6 in a 35-nm
bandpass centered at 551 nm.  The separation and p.a. of this source
is consistent with the position of the compact blob reported by Allen
et al. (IAUC 4747).  It is also consistent with a position predicted
for uniform motion of the bright source which was detected using
speckle techniques on 1987 Apr. 1 (IAUC 4382) and by Matcher et al.
on 1987 Apr. 15 (IAUC 4413).  We also detect star 2 (IAUC 4319)
separated by 3" from the SN with a magnitude difference of about 3
(at 551 nm) and p.a. of 315 +/- 5 degrees.  We do not see star 3
(IAUC 4322) in these observations, so it would have to be at least 4
mag fainter than the SN.  We also do not detect any feature to the
north of the SN, as suggested by Allen.  These features should now be
observable using direct imaging under good seeing conditions."

1989 March 4                   (4749)             Daniel W. E. Green

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