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THE ASTRONOMER Electronic Circular No 865      1994 July 24 19.39UT
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 SHOEMAKER-LEVY 9 (1993e)/COLLISION WITH JUPITER
Fragments T, U, V
Reports received via the SL9 message center indicate that there
were no obvious detections of the impacts of fragments T = 4 (Calar
Alto Observatory, South African Astronomical Observatory), U = 3
(Palomar Observatory, Teide Observatory, Swedish Solar Telescope at
La Palma, University of Massachusetts Whately Observatory, McDonald
Observatory) or V = 2 (McDonald, Palomar, Steward Observatory,
Siding Spring Observatory).
IAUC 6034
Fragment W
The impact of fragment W = 1 was recorded by SPIREX on
July 22.343 UT, a preliminary estimate indicating that the site
was as bright as that of fragment E at 2.36 microns. CASPIR
detected a slight brightening at 2.34 microns on July 22.337 that
faded briefly by 22.340, then strongly reappeared, saturating the
detector on 22.342 as the W site came into view; narrow-band
imaging beginning on 22.345 showed strong emission at 4.78 microns.
IRIS K-grism cubes showed the W impact as a distinct, bright,
pointlike source slightly south of the K site on July 22.342; the W
feature brightened dramatically, saturating the detector on
22.344, when it was at least 200 times brighter than the south
polar hood and about 4.5 times brighter than Ganymede at 2.34
microns.
A. C. Beresford, Myrtle Bank, South Australia, observed the W
impact site visually as it crossed Jupiter's central meridian on
July 22.436 UT.
IAUC 6034

COMET MCNAUGHT-HARTLEY (1994n)
Orbital elements (cf E855):

T  1995 Jan   6.0840 TT      w 344.13500 )
e  1.00000000                O  28.57100 ) 2000.0
q  1.9402900 A.U.            i  17.88700 )
Source: IAUC 6016    Positions are geocentric

Ephemeris by Hurst using EPH.EXE by N.James:

m = 10.0 + 5.0 log R + 10.0 log r

  Date    R.A. (2000) Dec.     R       r     Elong  Mag.    Motion
          h  m       o  '     (AU)    (AU)     o          "/hr P.A.
1994 July
  22.00  21 31.45  -43 30.0   1.856   2.787  150.6  15.8    20  223
  27.00  21 28.64  -43 57.8   1.809   2.747  151.9  15.7    21  232
1994 Aug
   1.00  21 25.32  -44 21.5   1.767   2.707  152.4  15.6    22  241
   6.00  21 21.59  -44 40.0   1.730   2.668  151.9  15.5    22  249
  11.00  21 17.58  -44 52.3   1.700   2.629  150.5  15.4    22  258
  16.00  21 13.44  -44 57.6   1.674   2.591  148.3  15.3    22  268
  21.00  21  9.35  -44 55.3   1.654   2.554  145.6  15.2    22  278
  26.00  21  5.47  -44 45.0   1.639   2.517  142.4  15.1    21  290
  31.00  21  1.96  -44 26.6   1.629   2.480  138.9  15.0    21  303

FN ANDROMEDAE
Tonny Vanmunster, Standen, Belgium reports on outburst of FN And on
1994 July 12.003UT at mv=13.5. Confirmed by G.Poyner July 12.020,
13.4.
Guy M Hurst







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Date: Mon, 25 Jul 1994 21:00:13 +0100 (BST)