TA e-circular

<title>TA e-circular</title>
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THE ASTRONOMER Electronic Circular No 424        1990 June 23 20.05UT
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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PERIODIC COMET HONDA-MRKOS-PAJDUSAKOVA (1990f)
J. V. Scotti reports his recovery of this comet with the 0.91-m
Spacewatch telescope at Kitt Peak, as given below.  The images are
very slightly diffuse, of diameter about 5"-6".
     1990 UT             R.A. (1950) Decl.        m1
     June 17.41532   22 24 08.59   -13 46 48.4   19.5
          18.44913   22 26 45.54   -13 38 10.7
     The following orbital elements by B. G. Marsden, Center for
Astrophysics, are from 31 observations 1974-1990 (mean residual
1".1), with nongravitational parameters A1 = -0.40 +/- 0.12,
A2 = -0.0495 +/- 0.0002:
                    Epoch = 1990 Sept.26.0 ET
     T = 1990 Sept.12.6864 ET         Peri. = 325.7020
     e = 0.821936                     Node  =  88.7097  1950.0
     q = 0.541120 AU                  Incl. =   4.2224
       a =  3.038913 AU    n = 0.1860487    P =   5.298 years
     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     June 23    22 39.12    -12 57.1
          28    22 54.69    -12 04.9    0.699    1.458    16.5
     July  3    23 13.16    -11 01.2
           8    23 35.80    - 9 39.9    0.528    1.324    15.1
          13     0 04.44    - 7 51.4
          18     0 41.65    - 5 21.2    0.385    1.187    13.4
          23     1 30.40    - 1 52.9
          28     2 32.27    + 2 37.0    0.298    1.046    11.8
     Aug.  2     3 43.54    + 7 29.9
           7     4 54.08    +11 33.1    0.310    0.904    10.6
          12     5 54.62    +14 08.3
          17     6 42.75    +15 29.9    0.416    0.766     9.8
IAUC 5035
 
COMET McNAUGHT-HUGHES (1990g)
Robert H. McNaught reports his discovery of a comet on a U.K.
Schmidt Telescope R plate taken by Shaun M. Hughes at Siding Spring,
as indicated below.  The discovery plate, which had cloud interfer-
ence at the end of the exposure, shows a moderately condensed 5"
coma.  The June 20 exposure was by McNaught with the Uppsala
Southern Schmidt telescope.
     1990 UT             R.A. (1950) Decl.        m1
     June 19.55397   17 38 50.97   -65 32 04.5   17
          19.59078   17 38 42.06   -65 31 49.8
          20.61933   17 33 45.04   -65 23 29.6
(Our congratulations to Rob, as one of our TA Group)
 
TA INDEX
We are delighted to welcome back John Isles in Cyprus who can now
be contacted via FAX:
Those on MICROLINK should type 'c' at the command option and then
the following at 'to:'
John Isles (AC:003,TLX:5323166,ANS:CYFAX) (RECEIPT)
Carlos Amengual in Spain now has a new mailbox. Those on JANET can
contact him using 'MAIL' with the following address:
CBS%UKC::ES.SICYD::CAM
 
Guy M Hurst
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