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IAUC 2262: 1970h; 1970g; N Cyg 1970

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IAUC number 

                                                  Circular No. 2262
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


PERIODIC COMET JOHNSON (1970h)
     Dr. Elizabeth Roemer, Lunar and Planetary Laboratory, telegraphs
that she and R. C. Elliott have recovered this comet with
the 154-cm reflector at the Catalina station, as shown below.  The
comet is diffuse, with central condensation and a tail < 1o.  The
position indicates a correction of Delta-T = -0.4 day to the prediction
by E. A. Vorob'ev (IAUC 2236).  The prediction by F. D. Byers and
W. H. Julian (Handbk Br. astr. Assoc. for 1970) requires correction
by Delta-T = +0.4 day.  In fact, the position of the comet is given very
closely by the mean of the two ephemerides.

     1970 UT          R. A. (1950) Decl.     Mag.
     July  5.44237    1 43.0     - 2 27       19


COMET ABE (1970g)
     Prof. M. Huruhata, Director of the Tokyo Observatory, cables
the following measurements by H. Kosai from plates exposed by T.
Seki, Kochi Observatory.  The time of the second observation on
IAUC 2260 should read July 4.68056 UT.

     1970 UT             R. A. (1950) Decl.        Mag.
     July  5.78434     2 18 22.88   +24 15 28.7    10
           5.79128     2 18 23.17   +24 15 38.5
           6.79132     2 18 37.42   +24 38 27.4    10


NOVA CYGNI 1970
     Mr. T. Seki, Kochi Observatory, provides the following
magnitude estimates:

     1970 UT          mp
     May  26.73      10.4     150-mm f/5.6 camera
     June 27.68      13      1116-mm f/5.2 camera

He has measured the following position from a plate taken with a
22-cm f/5 camera:

     R. A. = 20h50m46s.25, Decl. = +35o48'01".5  (1950.0)


1970 July 9                    (2262)              Brian G. Marsden

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