Circular No. 6013

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                                                  Circular No. 6013




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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


COMET NAKAMURA-NISHIMURA-MACHHOLZ (1994m)
     Word has been received of the independent discoveries of a
comet by Masamitsu Nakamura, Hideo Nishimura, and Donald Machholz.
The following positions are available:

     1994 UT             R.A. (2000) Decl.        m1    Observer   
     July  5.713      3 58.2       +70 11         9.0   Nakamura
           5.749      3 58         +70 10         9     Nishimura
           6.408      3 56         +70 12        10.5   Machholz
           6.43663    3 55 26.28   +70 12 25.5   10     Helin
           6.46528    3 55 21.56   +70 12 26.4            "

M. Nakamura (Hamamatsu, Shizuoka-Ken, Japan).  25x150 binoculars.
  Coma diameter 5'.  Communicated by T. Seki and S. Nakano.
H. Nishimura (Kakegawa, Shizuoka-Ken, Japan).  25x150 binoculars.
  Communicated by S. Nakano.  Coma diameter 2'.5.
D. Machholz (Colfax, CA).  27x120 binoculars.  Diffuse with some
  condensation.
E. Helin, K. Lawrence, and J. Alu (Palomar).  0.46-m Schmidt
  telescope films.  Measured by Lawrence.  Comet is diffuse with
  strong central condensation.


COMET TAKAMIZAWA-LEVY (1994f)
     Total visual magnitude estimates (cf. IAUC 6006):  June 8.90
UT, 8.8 (K. Sarneczky, Raktanya, Hungary, 20x60 binoculars); 14.04,
8.8 (L. Szentasko, Veresegyhaz, Hungary, 0.33-m reflector); 28.27,
8.7 (C. E. Spratt, Victoria, BC, 0.20-m reflector); 30.93, 9.6 (A.
Diepvens, Balen, Belgium, 0.15-m refractor); July 2.29, 9.4 (Spratt);
3.29, 9.7 (Spratt).


NOVA OPHIUCHI 1994
     A. C. Gilmore, Mount John University Observatory, reports the
following additional photometry (cf. IAUC 6008; uncertainty about
0.02 in each color except U-B, where the error may be 0.05):  June
21.617 UT, V = 10.68, U-B = -0.41, B-V = +0.48, V-Rc = +1.25, V-Ic
= +1.34.


1994 July 6                    (6013)            Daniel W. E. Green