TA e-circular

<title>TA e-circular</title>
<pre>
THE ASTRONOMER Electronic Circular No 415         1990 May 25 18.31UT
Ed:Guy M Hurst, 16,Westminster Close,  Kempshott Rise,   Basingstoke,
Hants, RG22 4PP, England. Telephone:   (0256)471074  Int:+44256471074
Telex: 94082518 Answerback: TAGUY                 Microlink: MAG60138
JANET:GMH @ UK.AC.CAM.ASTRONOMY.STARLINK or GUYH@UK.AC.SUSSEX.CLUSTER
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COMET LEVY (1990c)
The following precise positions have been reported:
     1990 UT             R.A. (1950) Decl.        m1    Observer
     May  22.47222   23 55 33.53   +27 37 47.0          Helin
          23.03779   23 55 52.16   +27 39 32.6   11     Mrkos
          23.04306   23 55 52.44   +27 39 33.7            "
E. Helin, B. Roman, and K. Lawrence (Palomar).  0.46-m Schmidt films.
  Measured by Roman.
A. Mrkos (Klet).
IAUC 5020
Andrew Pearce e-mails m1 estimates (0.20-m refl.): May 22.89, 10.3;
May 23.90, 10.3.
 
SUPERNOVA 1990J IN ANONYMOUS GALAXY
J. Mueller reports her discovery of a supernova in an anonymous
galaxy located at R.A. = 12h13m48s.2, Decl. = +12 48'18"
(equinox 1950.0).  The supernova (mag about 18) is 7" west and 10"
north of the galaxy nucleus, and was found on a blue plate taken
May 13 UT with the 1.2-m Oschin Telescope in the course of the
Second Palomar Sky Survey.  A spectrum obtained by M. Schmidt, D.
Schneider, J. Gunn, and R. Lucinio with the 5-m Hale reflector (+
4-shooter + spectrograph) on May 16 indicates that this is a
type-Ia supernova 10 to 20 days old.
 
IAUC 5016
 
1990 KA
E. Helin reports her discovery at of a fast-moving asteroidal
object on Palomar 0.46-m Schmidt films taken by herself, B. Roman,
and K. Lawrence, as follows:
     1990 UT             R.A. (1950) Decl.       Mag.
     May  18.27396   15 08 52.65   +10 38 52.8   15.2
          18.29809   15 08 52.98   +10 38 29.5
          20.35382   15 09 49.43   +10 07 01.1   15.3
          20.36528   15 09 49.81   +10 06 55.5
          21.28559   15 10 17.95   + 9 51 24.0   15.0
          21.41128   15 10 20.35   + 9 49 11.0
     The following preliminary orbital elements, by B. G. Marsden,
Center for Astrophysics, are necessarily uncertain:
 
     T = 1990 June  6.55 ET           Peri. = 142.71
     e = 0.3769                       Node  = 107.02    1950.0
     q = 1.2296 AU                    Incl. =   6.86
       a =  1.9736 AU      n = 0.35549      P =   2.77 years
 
     1990 ET      R.A. (1950) Decl.     Delta      r       V
     May   9    15 05.23    +12 07.8    0.278    1.259    14.7
          14    15 07.09    +11 30.5
          19    15 09.20    +10 28.5    0.260    1.242    14.6
          24    15 11.75    + 9 00.8
          29    15 14.94    + 7 07.8    0.251    1.232    14.5
     June  3    15 18.97    + 4 51.3
           8    15 23.94    + 2 14.9    0.250    1.230    14.5
          13    15 29.88    - 0 37.0
          18    15 36.82    - 3 39.2    0.259    1.234    14.6
IAUC 5018
 
Guy M Hurst
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