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IAUC 2853: 1975j; N Cyg 1975

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                                                  Circular No. 2853
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
Western Union: RAPID SATELLITE CAMBMASS


COMET MORI-SATO-FUJIKAWA (1975j)
     The following precise positions have been reported:

     1975 UT             R. A. (1950) Decl.        m1    Observer
     Oct.  7.37494     8 22 18.07   + 2 14 28.5          McCrosky
           7.49375     8 22 23.48   + 2 10 04.6          Giclas
           8.75486     8 23 21.77   + 1 22 54.3          Urata
           8.75833     8 23 21.99   + 1 22 44.8            "
           9.82778     8 24 10.95   + 0 41 45.8   10     Tomita
          11.72014     8 25 34.84   - 0 32 51.0   10     Herald
          11.76191     8 25 36.64   - 0 34 29.4            "
          12.13175     8 25 52.88   - 0 49 33.8    8.5   Haddow
          12.45833     8 26 07.02   - 1 02 47.7          Giclas
          14.08337     8 27 16.73   - 2 10 13.5          Milet
          14.12821     8 27 18.22   - 2 12 01.8   11       "
          16.46042     8 28 54.47   - 3 52 44.3          Giclas

R. E. McCrosky (Harvard College Observatory, Agassiz Station).  41-cm
   Metcalf astrograph.  Measurer: C. Y. Shao.
H. L. Giclas (Lowell Observatory).  Measurer: M. L. Kantz.
T. Urata (Nihondaira Observatory).  15-cm f/6 reflector.  From
   Nihondaira Obs. Circ. No. 696.
K. Tomita and Kanda (Tokyo Observatory, Okayama Station).
D. Herald (Kambah, near Canberra).  31-cm reflector.  Long. =
   -149o03'44".5, Lat. = -35o23'55".0, h = 582 m.
K. Haddow (Woolston Observatory).  Measurer: R. L. Waterfield.
B. Milet (Nice Observatory).  The first image is weak.


NOVA CYGNI 1975
     R. M. Hjellming, National Radio Astronomy Observatory, writes
that emission from the nova has become detectable at 8085 MHz.
Observed flux densities are: Sept. 3.0 UT, < 4 mJy; 24.0, 6 +/- 2; Oct.
1.09, 12; 8.90, 14.  At 2695 MHz the flux density was below 4 mJy.

     T. E. Margrave, University of Montana, provides further
photoelectric observations, obtained with the 40-cm reflector at the
Blue Mountain Observatory: Sept. 19.314 UT, V = 7.16, B-V = +0.18,
U-B = -0.49; 21.388, 7.29, +0.14, -0.49; 22.280, 7.35, +0.11, -0.47;
23.249, 7.43, +0.13, -0.48; Oct. 2.243, 7.90, +0.12, -0.49.  Estimated
errors are +/- 0.02.  Comparison stars were HR 8252 and 8001.


1975 October 21                (2853)              Brian G. Marsden

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