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IAUC 5292: 1991r; 1991q; 1991af; 1991d

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IAUC number 

                                                  Circular No. 5292
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


COMET HELIN-ALU (1991r)
     Eleanor Helin and Jeff Alu report their discovery of a comet on
films taken by Helin, K. Lawrence, P. Rose, and C. Brewer with the
0.46-m Schmidt telescope at Palomar.  The object is diffuse with no
apparent tail.

     1991 UT             R.A. (1950) Decl.        m1
     June 13.32257   16 35 54.60   -22 25 54.7    16
          14.32899   16 35 23.58   -22 18 26.4


COMET LEVY (1991q)
     The following precise positions have been reported:

     1991 UT             R.A. (1950) Decl.        m1    Observer
     June 14.74375    1 43 56.57   +13 41 32.5    7.5   Koishikawa
          14.74826    1 43 57.82   +13 41 55.3            "
          15.82374    1 48 47.86   +14 30 15.0          McNaught

M. Koishikawa (Sendai Obs., Ayashi station).  300-mm telephoto lens.
R. H. McNaught (Siding Spring).  Communicated by A. C. Gilmore.

     Total visual magnitude estimates:  June 15.43 UT, 9.6 (A. Hale,
Las Cruces, NM, 0.41-m reflector; 2'-3' coma); 15.44, 8.5 (C. S.
Morris, Pine Mountain Club, CA, 20x80 binoculars; 4'.4 coma).


SUPERNOVA 1991af IN ANONYMOUS GALAXY
     A. V. Filippenko, University of California at Berkeley,
reports: "Inspection of the uncalibrated spectrum of SN 1991af
obtained by Sargent and Strauss (cf. IAUC 5282, 5287) indicates that
this is a typical type-Ia supernova (rather than II or Ib) about 1-2
months past maximum brightness."


COMET SHOEMAKER-LEVY (1991d)
     Total visual magnitude estimates (cf. IAUC 5217):  Apr. 7.85
UT, 13.5 (H. Mikuz, Ljubljana, Yugoslavia, 0.20-m reflector + CCD);
17.51, 13.7 (A. Pearce, Dowerin, W.A., 0.41-m reflector); May 2.19,
13.7 (A. Hale, Las Cruces, NM, 0.41-m reflector); 12.23, 13.5 (C. S.
Morris, Lockwood Valley, CA, 0.51-m reflector); June 4.18, 13.6
(Hale).


1991 June 15                   (5292)             Daniel W. E. Green

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