TA e-circular

<title>TA e-circular</title>
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THE ASTRONOMER Electronic Circular No 889       1994 Oct 02 11.55UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074
INTERNET: GMH at AST.STAR.RL.AC.UK  or    GMH at GXVG.AST.CAM.AC.UK
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PERIODIC COMET LONGMORE (1994q)
J. V. Scotti, Lunar and Planetary Laboratory, reports his recovery
of this comet as follows.  The comet is essentially of stellar
appearance and its position in very close agreement with the
prediction on MPC 20123.
     1994 UT             R.A. (2000) Decl.        m1
     Sept.27.47845    9 39 46.16   +35 27 49.7   20.5
          27.48339    9 39 46.66   +35 27 47.5
          27.48787    9 39 47.15   +35 27 47.4
          28.46961    9 41 16.32   +35 23 25.8
          28.47579    9 41 16.70   +35 23 24.8
          28.48108    9 41 17.30   +35 23 22.8   21.0
IAUC 6084

1993 SB
A tentative recovery of this object by J. Luu and D. Jewitt with
the University of Hawaii's 2.2-m reflector on Sept. 10 has been
confirmed by Jewitt and J. Chen on Sept. 29 and by M. R.Kidger and
G. V. Williams on images obtained with the 2.5-m Isaac Newton
reflector on Aug. 15 and 16.  Computations by B. G.Marsden show
that this is the first of the transneptunian objects found during
the past two years actually known to have a Neptune-crossing
orbit, a general solution yielding an obviously unstable
result with a = 42.9 AU, e = 0.42, q = 25.0 AU, i = 2 deg.
However, the uncertainty is such that the available observations
can be represented almost equally well by an orbit with
a = 39.4 AU,  e = 0.32, q = 26.8 AU, i = 2 deg, which is in 2:3
resonance with Neptune and prevents the object from approaching
within 21 AU of Neptune. Further details are on MPEC 1994-S06.
As with 1993 RO and SC, further observations, at this and future
oppositions, will be required before it can be proven whether
there can be close encounters with Neptune or not.
IAUC 6085

DX AND
Further visual estimates (cf E887):
1994 Sept 29.790, 11.8 (M.Westlund, Uppsala, Sweden 0.21-m SC)
          30.133, 11.8 (T.Vanmunster, Standen,Belgium 0.35-m)
          30.689, 11.9 (Y.Takenaka, Kyoto, Japan 0.20-m SC)
          30.772, 11.5 (J.Pietz, Germany)
     Oct   1.489, 11.6 (Y.Takenaka)

VIDEO: 1994 AGM
A video of this meeting which took place on 1994 Sept 3 is
now available by sending a remittance of 12 pounds, made
payable to 'The Astronomer', to the main Editor at the
address shown at the heading of this circular.
This price covers UK destinations post paid. For Europe
and beyond send 15 pounds.

Guy M Hurst


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