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IAUC 5828: 1993 MF; 1993J

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                                                  Circular No. 5828
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)


1993 MF
     The following improved orbital elements are from 34 observations,
June 22-30.  The additional observations will be published
on the Aug. 2 MPCs.

     T = 1993 Aug.  1.322 TT          Peri. =  74.639
     e = 0.53971                      Node  = 241.316   2000.0
     q = 1.14629 AU                   Incl. =   8.114
       a =  2.49035 AU     n = 0.250791     P =   3.93 years

1993 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    V
July  2    20 43.02   +12 27.8   0.245   1.200  134.1   37.4   13.4
      4    20 49.75   +14 29.6   0.240   1.193  132.9   38.6   13.3
      6    20 56.64   +16 31.2   0.237   1.187  131.6   39.8   13.3
      8    21 03.69   +18 31.8   0.234   1.181  130.3   41.0   13.3
     10    21 10.89   +20 30.6   0.231   1.176  129.1   42.2   13.3
     12    21 18.22   +22 26.7   0.229   1.171  127.8   43.3   13.3
     14    21 25.67   +24 19.3   0.228   1.166  126.5   44.4   13.3
     16    21 33.22   +26 07.8   0.227   1.162  125.3   45.5   13.3
     18    21 40.87   +27 51.4   0.226   1.159  124.2   46.5   13.4
     20    21 48.58   +29 29.7   0.226   1.155  123.2   47.4   13.4
     22    21 56.33   +31 02.1   0.226   1.153  122.2   48.2   13.4
     24    22 04.10   +32 28.3   0.227   1.150  121.4   48.9   13.4
     26    22 11.88   +33 48.1   0.228   1.149  120.6   49.5   13.4


SUPERNOVA 1993J IN NGC 3031
     S. D. Van Dyk, H.-A. Nguyen, and K. W. Weiler, Naval Research
Laboratory; R. A. Sramek and M. P. Rupen, National Radio Astronomy
Observatory; and N. Panagia, Space Telescope Science Institute,
report that new observations of SN 1993J made with the Very Large
Array in 'CnB' and 'C' configurations show that radio emission from
the supernova is now detectable at 20-cm wavelength (1.45 GHz) for
the first time.  On and prior to 1993 May 25, no emission was
detectable to a limit (3-sigma) of 0.25 mJy in that band, while by
June 11, 18, and 25, the source was detectable at levels of 1.3,
1.8, and 3.6 mJy, respectively.  The source remains strong (> 50
mJy) in the three previously detected radio bands (1.3, 2, and 3.6
cm) and continues to rapidly increase in flux density at 6 cm.
Monitoring with the VLA in all bands continues.


1993 July 2                    (5828)            Daniel W. E. Green

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