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IAUC 3182: P/SCHWASSMANN-WACHMANN 1; X Per (= 4U 0352+30)

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                                                  Circular No. 3182
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK     Telex: 921428
Telephone: (617) 864-5758


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     The following precise positions have been reported:

     1977/78 UT          R. A. (1950) Decl.        m1    Observer
     Dec. 10.67778     5 13 20.35   +32 02 20.3   16.0   Furuta
          10.69097     5 13 19.92   +32 02 19.3            "
     Jan.  3.59618     5 00 41.38   +31 27 04.7   12.0     "
           4.46441     5 00 17.99   +31 25 33.5   12     Natori
           4.51412     5 00 16.42   +31 25 24.7            "
           6.53912     4 59 23.23   +31 21 38.9   12.5     "
          14.52535     4 56 16.88   +31 06 15.3   13.5   Furuta
          14.53993     4 56 16.55   +31 06 14.4            "
          30.81634     4 52 16.62   +30 34 25.5   16.0   Mrkos
     Feb.  1.76010     4 52 01.68   +30 30 43.0   16.5     "
           3.50729     4 51 50.18   +30 27 39.5   14.5   Natori
          12.81119     4 51 33.90   +30 11 00.4   17.0   Mrkos

T. Furuta (Tokai).  From Orient. Astron. Assoc. Comet Bull. Nos.
   159 and 160.
A. Natori (JCPM Yakiimo Station). From Nihondaira Obs. Circ. No. 949.
A. Mrkos (Klet Observatory).  62.5-cm Maksutov camera

     Total visual magnitude estimates by J. Bortle, Brooks
Observatory (32-cm reflector): Jan. 31.15 UT, ~ 12.5; Feb. 4.01, 12.5
(coma diameter 1:8); 5.02, ~ 12.7; 9.0, [13; 10.0, [13.


X PERSEI (= 4U 0352+30)
     E. F. Guinan and G. P. McCook, Villanova University Observatory;
and J. D. Dorren, Biruni Observatory, Shiraz, report new
photoelectric observations of X Per using wide- and narrow-band
filters centered near H-alpha.  An increase in light of about 0.23
magnitude was detected between 1977 Aug. 10 and 1978 Jan. 16.
Observations obtained in February indicate that the light has begun
slowly to decrease, having diminished by ~ 0.03 magnitude on Feb.
19.  During this interval no appreciable change in the H-alpha-1ine
strength was uncovered.  The light variation appears to be approximately
sinusoidal and consistent with the ~ 584-day spectroscopic
period found by Hutchings et al. (1974, Astrophys. J. 191, L101).
If this is the case, then the preliminary analysis of the data is
consistent with tidal distortion of the visible component produced
by a very massive (>~ 20 Msol) unseen companion.


1978 March 2                   (3182)              Brian G. Marsden

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