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IAUC 3283: 1978m; V533 Her

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IAUC number 

                                                  Circular No. 3283
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 SEARGENT (1978m)
     D. Herald, Kambah, near Canberra, provides the following precise
positions, obtained with a 31-cm reflector:

     1978 UT             R. A. (1950) Decl.
     Oct.  2.75295    11 54 46.75   -38 44 56.6
           2.76076    11 54 46.16   -38 45 41.2
           2.78080    11 54 44.89   -38 47 37.8
           4.73259    11 52 24.34   -41 56 54.9
           4.76896    11 52 21.84   -42 00 30.6

     The following parabolic orbital elements have been calculated.
The ephemeris is from the first set.

                   M. P. Candy           B. G. Marsden
             (> 3 obs. Oct. 2-4)      (5 obs. Oct. 2 & 4)
          T = 1978 Sept. 14.654       1978 Sept. 15.16 ET
      Peri. = 205.60                  211.32
      Node  =  41.40                   40.51   1950.0
      Incl. =  68.63                   66.51
          q =   0.3683                  0.3725 AU

     1978 ET     R. A. (1950) Decl.     Delta     r      m1
     Sept.29    11 58.88    -32 47.2    1.001   0.537    5.8
     Oct.  4    11 53.25    -40 46.1
           9    11 46.54    -49 04.4    0.871   0.734    6.9
          14    11 37.39    -57 56.2
          19    11 21.75    -67 24.2    0.787   0.932    7.7
          24    10 42.8     -77 11.3
          29     7 18       -85 04.4    0.772   1.124    8.4

                   m1 = 8.5 + 5 log Delta + 10 log r

     Visual magnitude estimate by B. Sumner, Perth, Australia (9 x
65 binoculars): Oct. 3.84 UT, 6.4, tail 2o long in p.a. ~ 180o.


V533 HERCULIS
     J. Patterson, McDonald Observatory, writes that photoelectric
observations from July 28 through Sept. 14 reveal the presence of
strictly periodic oscillations in this old 1963 nova.  The period
is 63s.63303 +/- 0s.00003, the amplitude 2 percent in unfiltered
light.


1978 October 6                 (3283)              Brian G. Marsden

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