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IAUC 3526: U Gem; P/ENCKE; (1862)

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                                                  Circular No. 3526
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


U GEMINORUM
     J. Mattei, AAVSO, communicates the following visual magnitude
estimates of a new outburst: Oct. 8.42 UT, 13.3 (E. Mayer, Barberton,
OH); 8.53, 13.1 (J. Morgan, Prescott, AZ); 9.52, 9.3 (Morgan).


PERIODIC COMET ENCKE
     The following precise position has been measured by C.-Y. Shao
from a plate taken by G. Schwartz at Harvard's Agassiz Station:

     1980 UT             R. A. (1950) Decl.         m2
     Oct.  8.36310     5 04 09.27   +50 32 37.2    16.5

The 9-min exposure with the 1.5-m reflector shows the comet as a
strong condensation in a weak fan coma.  This and the Aug. 13
Agassiz position (MPC 5485) indicate that the correction to the prediction
on MPC 5129 is Delta-T = -0.0006 +/- 0.0003 day (see also IAUC 3521).


(1862) APOLLO
     It seems not to be generally known that this object will make a
close approach to the earth next month.  The following ephemeris ss
extracted from MPC 5328.  A 10-day ephemeris from Nov. 17 onward is
also given in the 1981 Efemeridy Malykh Planet (page 221).

     1980 ET     R. A. (1950) Decl.     Delta     r     Mag.
     Nov.  5    16 57.14    -19 49.1    0.110   0.901   15.3
           7    17 24.54    -17 03.8    0.092   0.920   14.8
           9    18 02.58    -12 39.9    0.075   0.939   14.3
          11    18 55.64    - 5 41.1    0.063   0.958   13.6
          13    20 05.58    + 4 10.3    0.056   0.977   13.0
          15    21 24.70    +14 32.1    0.057   0.996   12.6
          17    22 36.93    +21 57.5    0.066   1.015   12.6
          19    23 32.69    +25 59.5    0.080   1.035   12.8
          21     0 12.83    +27 56.9    0.096   1.054   13.1
          23     0 41.65    +28 51.9    0.115   1.073   13.4
          25     1 02.89    +29 16.9    0.135   1.092   13.7
          27     1 19.05    +29 26.9    0.155   1.111   14.0
          29     1 31.76    +29 29.2    0.176   1.130   14.2
     Dec.  1     1 42.05    +29 27.6    0.198   1.149   14.5


1980 October 10                (3526)              Brian G. Marsden

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