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IAUC 2230: N Ser 1970; 1969g

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                                                  Circular No. 2230
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


NOVA SERPENTIS 1970
     Dr. P. W. Hill, St. Andrews University Observatory, communicates
the following observations by F. Clayton and B. Yare.  The
measurements on March 5 and 12 were affected by cloud; on the other
nights the expected errors are not greater than i 0.03.  15-cm
refractor, coude focus; 1P21 photomultiplier; U, B, V filters.
Comparison star 74 Oph, assumed V = 4.86, B-V = +0.90.

     1970 UT        V      B - V
     Mar.  5.22    5.45:   +0.68
           7.18    5.49    +0.74
          10.17    5.58    +0.74
          12.16    5.75:   +0.76
          18.19    6.02    +0.68

     Visual estimates by F. Pilcher, Jacksonville, Illinois,
suggest that there was a slight brightening of perhaps 0.5 magnitude
between March 13 and 16.


COMET TAGO-SATO-KOSAKA (1969g)
     The following precise positions have been reported:

     1970 UT             R. A. (1950) Decl.        Observer
     Feb. 27.77396     3 35 56.56   +43 34 11.3    Jorgenson
          27.77818     3 35 57.06   +43 34 17.6      "
          27.78212     3 35 57.89   +43 34 21.2      "
          28.76683     3 38 33.60   +43 54 26.4      "
     Mar.  7.42847     3 55 19.22   +45 49 16.3    Seki
           7.44896     3 55 21.74   +45 49 32.4      "
           7.77707     3 56 09.78   +45 54 18.6    Mrkos
           7.78009     3 56 10.44   +45 54 22.7    Jorgenson
           9.78639     4 01 00.34   +46 22 32.3    Mrkos
          10.79493     4 03 23.00   +46 36 05.4      "
          11.55556     4 05 10.52   +46 45 54.9    Seki
          11.77758     4 05 42.27   +46 48 36.5    Jorgenson

B. G. Jorgenson and B. Reipurth (Copenhagen University Observatory).
   25-cm photographic refractor.
T. Seki (Kochi Observatory).  22-cm f/S camera.
A. Mrkos (Klet Observatory).  40-cm f/2.6 Maksutov telescope.


1970 April 6                   (2230)              Brian G. Marsden

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