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IAUC 2745: COMET BOETHIN; P/SCHWASSMANN-WACHMANN 1

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IAUC number 

                                                  Circular No. 2745
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 BOETHIN
     Letters received in mid-January from the Rev. Leo Boethin,
Abra, The Philippines, reported observations of a possible comet
discovered by him on Jan. 4.  Bright moonlight made confirmation
impossible, and there was no further news of the comet until Feb. 3,
when a cablegram from the Rev. Boethin brought a single, very rough
observation made on Feb. 1.  With the help of a tentative ephemeris
by the undersigned, C. Scovil obtained a suspected visual observation
of the comet with the 56-cm Maksutov telescope at the Stamford
Museum, but he was unable to obtain a convincing photographic
confirmation.  The first definite confirmations were obtained visually
by J. E. Bortle, Brooks Observatory, with a 32-cm reflector; and by
R. E. McCrosky photographically with the 41-cm refractor and 155-cm
reflector at Harvard Observatory's Agassiz Station on Feb. 9.  All
observers described the comet as very diffuse, with some very
slight confirmation.  The observations are as follows:

     1975 UT          R. A. (1950) Decl.     m1     Observer
     Jan.  4.521     23 00 56    - 5 13     12.3    Boethin
           5.479     23 05 32    - 4 37     12.0      "
           7.479     23 12 54    - 3 37     12.0      "
           8.500     23 17 14    - 3 02     12.0      "
     Feb.  1.458      0 55       +10                  "
           4.035      1 07.5     +11 38     12      Scovil
           9.00       1 29.2     +14 05     11.3    Bortle
           9.069      1 29.2     +14 09             McCrosky
          10.00       1 33.3     +14 38     11.3    Bortle


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Further precise positions have been reported as follows:

     1974/75 UT          R. A. (1950) Decl.        m1    Observer
     Dec. 14.74071    23 05 27.51   + 0 45 26.0   17.0   Mrkos
          14.75512    23 05 27.91   + 0 45 27.3            "
     Jan. 15.10630    23 20 42.39   + 2 10 03.9   15.6   Giclas
          15.12812    23 20 43.27   + 2 10 08.1            "

A. Mrkos (Klet Observatory).
H. L. Giclas (Lowell Observatory).  Measurer: Mary Lou Kantz.


1975 February 10               (2745)              Brian G. Marsden

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