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IAUC 2241: 1970e; N Aql 1970

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IAUC number 

                                                  Circular No. 2241
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 ASHBROOK-JACKSON (1970e)
     Mr. Z. M. Pereyra, Cordoba Observatory for the CNEGH, cables
that he recovered this comet on May 1 with the 154-cm reflector at
Bosque Alegre.  The comet is diffuse, with condensation and a tail
< 1o.  The object seems to be identical with one he tentatively
reported in March, although on the first plate the guiding was poor
and the star field very crowded, and bad weather did not permit a
confirmation on a second night.  The prediction on IAUC 2120 and
2193 requires correction by approximately AT = -0.14 day.

     1970 UT             R. A. (1950) Decl.        Mag.
     Mar.  9.33193    18 16.27      -35 02.4       19
           9.34964    18 16.30      -35 02.5
     May   1.28990    19 02.4       -38 10         18


NOVA AQUILAE 1970
     Dr. Y. Kozai, Tokyo Astronomical Observatory, writes that H.
Kosai has measured the following position from a plate taken with
a 50-cm Schmidt at the Dodaira station: R. A. = 19h22m15s.42, Decl. =
+4o08'51".0 (1950.0).  Mr. Kosai identifies the prenova as a star
of magnitudes 19.4 (blue) and 17.6 (red) appearing on the Palomar
Sky Survey prints at a position differing from the above by dR.A. =
-0s.17, dDecl. = +0".3.  He remarks, however, that there is another star,
of magnitudes 19.2 (blue) and 16.7 (red), at dR.A. = -0s.18, dDecl. =
-0".8.

     The following magnitude estimates have been reported:

     1970 UT       Mag.    Observer   1970 UT       Mag.    Observer
     Apr.  7.76 > 11.5 pg  Honda      Apr. 14.79    7.1 pg  Kato
          12.77    6.5 pg  Kato            15.752   7.0 v   Kosai
          14.73    7.1 pg  Abe             15.76    7.1 pg  Honda
          14.787   7.6 pg  Honda           16.73    7.3 V   Kosai
          14.787   6.8 *   Kosai           18.30    1.6 V   Mayer

N. Honda, H. Kato and O. Abe (Japan).  Communicated by S. Kanda.
H. Kosai (Tokyo Astronomical Observatory).  *Estimate from Honda's
  discovery plate, Fujinar camera, panchromatic plate, limiting
  magnitude 11.
E. H. Mayer (Barberton, Ohio).  7 x 35 binoculars.


1970 May 6                     (2241)              Brian G. Marsden

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