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IAUC 3848: 1983l; epsilon Aur; GK Per

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IAUC number 

                                                  Circular No. 3848
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


COMET CERNIS (1983l)
     Further precise positions have been reported as follows:

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

    July 25.77893    2 42 19.12   +10 21 51.5   13   Seki
         26.75648    2 42 08.81   +10 09 10.2        Gilmore
         26.76215    2 42 08.76   +10 09 06.0          "

T. Seki (Kochi Observatory, Geisei Station).
A. C. Gilmore (Mt. John Observatory).  Measurer: P. M. Kilmartin.

     Improved parabolic elements from observations July 21-26:

          T = 1983 July 24.196 ET  Peri. = 186.918
                                   Node  = 208.877   1950.0
          q =   3.31349 AU         Incl. = 134.808

     1983 ET     R.A. (1950.0) Decl.      p        r       m1

     Aug.  4     2 39.90    + 8 12.0
          14     2 35.00    + 5 23.8    2.959    3.319    10.6
          24     2 27.35    + 2 03.9
     Sept. 3     2 16.62    - 1 49.0    2.633    3.336    10.3
          13     2 02.64    - 6 10.8
          23     1 45.60    -10 49.9    2.450    3.363    10.2


epsilon AURIGAE
     M. Parthasarathy and D. L. Lambert, McDonald Observatory, report:
" Observations of epsilon Aur during totality near zero phase show
a significant decrease in the strength of the K 770-nm resonance
line: W-lambda was 0.055 nm during 1982 Dec.-1983 Mar., 0.040 nm during
Apr.-May and 0.024 nm during July.  The Na D lines also decreased
in strength, their strength now being similar to that before the
eclipse.  The H-alpha line is broad, and the emission in the wings has
disappeared.  These observations suggest that the neutral gas is
mostly confined to the outer regions of the eclipsing object."


GK PERSEI
     J. Mattei, AAVSO, communicates the following additional
visual magnitude estimates (cf. IAUC 3840): July 21.30 UT, 11.9
(J. Bortle, Stormville, NY); 23.30, 11.5 (C. Scovil, Stamford,
CT); 25.30, 11.6 (Bortle).


1983 August 5                  (3848)              Brian G. Marsden

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