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IAUC 3998: 1984q; N Sgr 1984; NSV 2229

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                                                  Circular No. 3998
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


COMET SHOEMAKER (1984q)
      Further positions have been reported as follows:

     1984 UT            R.A.   (1950.0)   Decl.     Observer

     Oct.  4.1695     23 06.85       +18 13.2       Gibson
           5.17049    23 05 44.36    +18 22 59.3    Tatum

J. Gibson (Palomar).  1.2-m Schmidt.
J. B. Tatum (University of Victoria).  0.25-m f/2 Schmidt.

     The following parabolic orbital elements are based on the
three accurate positions.  The comet may be a short-period one.

           T = 1984 June 30.87 ET  Peri. = 343.36
                                   Node  = 345.06   1950.0
           q =   2.1959 AU         Incl. =  39.75

     1984 ET     R.A. (1950.0) Decl.      p        r       m1

     Oct.  2    23 09.36    +17 51.9
           7    23 03.78    +18 39.7    1.546    2.468    12.9
          12    22 58.99    +19 21.1
          17    22 55.02    +19 56.9    1.661    2.522    13.1
          22    22 51.91    +20 28.2
          27    22 49.67    +20 56.0    1.797    2.578    13.4


NOVA SAGITTARII 1984
     W. Liller, Vina del Mar, Chile, provides the following revised
and new approximate visual magnitude estimates: Sept. 25.02
UT, 10.3; 25.99, 9.7; 27.00, 10.5; 29.01, 10.6; Oct. 3.02, 10.6.

     H. Pedersen, La Silla, reports that M. P. and P. Veron observed
the nova over the range 610-710 nm using the 2.2-m European
Southern Observatory telescope with the Boller and Chivens spectrograph
and CCD detector.  Broad, asymmetric H-alpha emission was present
on Oct. 4 with a width of 6.8 nm (3100 km/s) at the base.


NSV 2229
     This object (cf. IAUC 3924, etc.) was not recorded down to
mag ~ 13 photographically on Sept. 6 by D. di Cicco, Sudbury, MA;
and to mag ~ 15 visually on Sept. 22 by di Cicco and also by M.
Verdenet, Bourbon-Lancy, France.


1984 October 5                 (3998)              Brian G. Marsden

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