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IAUC 2867: Occn OF 4C -06.34 BY VENUS; 1975j; AO 0235+164; Corrs

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                                                  Circular No. 2867
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


OCCULTATION OF 4C -06.34 BY VENUS
     G. E. Taylor, H.M. Nautical Almanac Office, writes that recent
measures, at Gainesville, Florida, and Cambridge, England, both
indicate that the assumed declination of the radio source 4C -06.34
is in error by about six times the quoted probable error of 5".
Consequently, the occultation by Venus, predicted as being
observable from North and South America on Nov. 30 (Handb. Br. Astron.
Assoc. for 1975), will not be observable from anywhere on the earth.


COMET MORI-SATO-FUJIKAWA (1975j)
     The following precise positions have been reported:

     1975 UT             R. A. (1950) Decl.        m1    Observer
     Oct. 30.18495     8 36 39.98   -15 30 07.8    8.9   Milet
          30.20122     8 36 40.40   -15 31 04.1            "
     Nov.  2.81771     8 38 06.78   -19 07 45.7    9     Tomita
           2.82014     8 38 06.93   -19 07 55.3            "
           3.72503     8 38 25.51   -20 04 24.6          Koishikawa
           3.77778     8 38 26.49   -20 07 41.5            "
           3.80868     8 38 26.88   -20 09 40.5    9     Tomita
           3.81111     8 38 26.71   -20 09 50.5            "

B. Milet (Nice Observatory).  Very good images.
K. Tomita (Tokyo Astronomical Observatory, Dodaira Station).
M. Koishikawa (Sendai Observatory, Ayashi Station).  20-cm f/5.5
   reflector.  From Nihondaira Obs. Circ. No. 714.

     The following improved orbital elements, by the undersigned,
are from 47 observations Oct. 6 to Nov. 3.

       T = 1975 Dec. 25.7922 ET  Peri. = 246.1973
                                 Node  = 277.9880   1950.0
       q = 1.604701 AU           Incl. =  91.5965

     1975/76 ET  R. A. (1950) Decl.     Delta     r      m1
     Dec. 14     7 54.19    -69 23.9    1.395   1.613    8.3
          19     7 21.5     -74 22.9
          24     6 26.0     -78 20.5    1.486   1.605    8.4
          29     4 57.8     -80 44.6
     Jan.  3     3 12.1     -81 05.1    1.604   1.609    8.6
           8     1 48.6     -79 44.3
          13     0 56.9     -77 36.9    1.735   1.624    8.8
          18     0 26.2     -75 17.8

          23     0 07.4     -73 01.9    1.865   1.650    9.0
     Feb.  2    23 47.81    -68 58.6
          12    23 39.66    -65 39.8    2.089   1.731    9.5
          22    23 36.58    -63 03.2
     Mar.  3    23 35.92    -61 05.1    2.234   1.847    9.9
          13    23 36.26    -59 42.8
          23    23 36.66    -58 54.6    2.288   1.988   10.3
     Apr.  2    23 36.39    -58 40.0
          12    23 34.61    -58 59.5    2.258   2.148   10.6
          22    23 30.30    -59 53.2
     May   2    23 22.07    -61 20.9    2.169   2.320   10.8
          12    23 07.74    -63 19.1
          22    22 44.21    -65 37.5    2.065   2.502   11.1
     June  1    22 07.39    -67 54.3
          11    21 14.40    -69 29.5    2.009   2.688   11.3
          21    20 09.78    -69 34.6
     July  1    19 07.63    -67 45.4    2.066   2.878   11.7

              m1 = 5.5 + 5 log Delta + 10 log r

     Selected total visual magnitude estimates: Nov. 1.37 UT, 8.7
(J. Bortle, Brooks Observatory, 10 x 50 binoculars; suspected tail
12' long in p.a. 330o); 5.34, 8.5 (Bortle); 8.46, 8.8 (P. Maley,
Houston, Texas, 13-cm refractor); 11.45, 8.7 (Maley); 13.72, 8.5
(B. Sumner, Windsor, Queensland, 15-cm f/4 reflector, 27 x).


AO 0235+164
     T. D. Kinman, Kitt Peak National Observatory; and G. H. Rieke,
University of Arizona, report that the BL Lac-type object AO 0235
+164 (Spinrad and Smith 1975, Astrophys. J. 201, 275) is undergoing
an outburst.  On Oct. 3 and Nov. 14 UT it was respectively at V =
15.51 and V ~ 14.3, compared with the previous range of magnitude
17.5 to 19.5.  Current infrared magnitudes are K = 9.5 and N = 4.9.


CORRIGENDA
IAUC 2769: Comet Smirnova-Chernykh (1975e).  In the Apr. 4 observation,
   for  +23 52 45.5  read  +23 52 54.5.
IAUC 2773: Comet van den Bergh (1974g).  On Jan. 23 m2 should read
   19.6, not 9.6.
IAUC 2855: Probable New Satellite of Jupiter.  L. M. Vaughn should
   be added as assisting with the Steward Observatory positions.
IAUC 2861 and 2862: Comet Suzuki-Saigusa-Mori (1975k) and Comet
   Mori-Sato-Fujikawa (1975j).  The observations on Oct. 21, attributed
   to T. Seki, were made by T. Kurosaki (Utsunomiya).  See
   Nihondaira Obs. Circ. No. 714; Yamamoto Circ. Nos. 1817 and 1818.
IAUC 2863: Coordinates of Observatories.  For JCPM Ayashi Station
   read Sendai Observatory, Ayashi Station.


1975 November 19               (2867)              Brian G. Marsden

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