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IAUC 4765: NGC 3783; CY UMa; U Gem; 1988r; 3C 390.3

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IAUC number 

                                                  Circular No. 4765
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


NGC 3783
     H. Winkler, University of Cape Town; and F. van Wyk, South
African Astronomical Observatory, write that UBV observations of
the Seyfert 1 galaxy NGC 3783 on Mar. 31 and Apr. 3 show that it
is at its brightest level so far recorded:  V = 12.75, B-V = +0.49,
U-B = -0.74 (20" aperture).


CY URSAE MAJORIS
     Visual magnitude estimates (cf. IAUC 4763):  Mar. 28.5 UT,
[14.0 (M. Koshiro, Suwa, Nagano, Japan); 29.08, 12.4 (P. Schmeer,
Bischmisheim, W. Germany); 29.88, 13.1 (Schmeer); 30.45, 13.6 (T.
Kato, Kyoto, Japan); 31.5, [14.5 (Kato).


U GEMINORUM
     Further visual magnitude estimates (cf. IAUC 4755):  Mar.
10.92 UT, 9.4 (M. Verdenet, Bourbon-Lancy, France); 11.90, 10.6
(J. D. Shanklin, Cambridge, England); 13.05, 11.3 (P. Sventek,
Houston, TX); 13.83, 12.1 (P. Schmeer, Bischmisheim, W. Germany);
23.92, [13.3 (Schmeer).


COMET YANAKA (1988r)
     Ephemeris extension (cf. IAUC 4730) from orbital elements on
MPC 14322:

     1989 ET      R.A. (1950) Decl.     Delta      r       m1
     Apr.  4     7 21.92    -21 00.6    1.835    2.227    17.3
          14     7 27.82    -19 47.3
          24     7 35.13    -18 55.2    2.350    2.513    18.4
     May   4     7 43.40    -18 20.9
          14     7 52.34    -18 02.5    2.854    2.787    19.2
          24     8 01.72    -17 58.1
     June  3     8 11.37    -18 06.2    3.332    3.050    20.0


3C 390.3
     Corrigendum.  On IAUC 4763, line 1, the authors should read
W. Wamsteker, J. Clavel, and J. Van Santvoort


1989 April 5                   (4765)             Daniel W. E. Green

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