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IAUC 3888: 1983t; 1983j; N Nor 1983; lambda Eri

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IAUC number 

                                                  Circular No. 3888
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 617-864-5758


PERIODIC COMET KOWAL-VAVROVA (1983t)
     K. S. Russell, U.K. Schmidt Telescope Unit, has measured the
following precise positions of the ends of a very faint, but quite
definite, cometary trail on an exposure by J. Barrow:

      1983 UT             R.A.   (1950.0)    Decl.      m1

      Sept.28.40793     16 41 20.63     -18 29 20.1     18
           28.42182     16 41 21.58     -18 29 22.3

     The following improved orbital elements have been determined
by the undersigned from the observations May 8 to Sept. 28:

         T = 1983 Apr. 2.1856 ET
     Peri. =  19.4261                    e =   0.588380
     Node  = 201.8442   1950.0           a =   6.336374 AU
     Incl. =   4.3168                    n =   0.0617935
         q =   2.608181 AU               P =  15.95 years


PERIODIC COMET IRAS (1983j)
     Further total visual magnitude estimates: Sept. 13.24 UT,
11.0 (C. E. Spratt, Victoria, BC, 0.20-m reflector); 28.85, 11.1
(J.-C. Merlin, Le Creusot, France, 0.26-m reflector); Oct. 5.84,
11.5 (Merlin); 12.22, 12.0 (Spratt); 15.22, 11.8 (C. S. Morris,
Harvard, MA, 0.25-m reflector); 30.99, 12.6 (Morris).


NOVA NORMAE 1983
     H. J. Wood, Cerro Tololo Interamerican Observatory, communicates
the following infrared observations (uncertainties +/- 0.02)
by B. W. Carney on Sept. 21.04 UT: K = 5.79, J-K = +0.92, H-K =
+0.38, K-L = +0.67.


lambda ERIDANI
     P. K. Barker, Astronomy Department, University of Western
Ontario, reports the reappearance of H-alpha emission in the Be star
lambda Eri.  Intensifier-dissector-scanner observations following the
emission episode of late 1982 showed only photospheric absorption
at H-alpha on 1983 Mar. 13 and Sept. 1.  On Oct. 31 weak V and R
emission peaks had intensity 1.05 and were separated by 600 km/s.  The
remaining narrow absorption had central intensity 0.85.


1983 November 10               (3888)              Brian G. Marsden

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