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IAUC 6037: 1993e; 1994n

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                                                  Circular No. 6037
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)


PERIODIC COMET SHOEMAKER-LEVY 9 (1993e)
     Using the observed times of the more significant impacts of the
cometary fragments, S. Nakano, Sumoto, Japan, updates the IAUC 6026
predictions of jovian central-meridian passages of the sites as follows
(in order of the first passage on July 25 UT and assuming rotation with
system III): site L, July 25.006 UT; G, 25.051; S, 25.059; R, 25.075;
Q, 25.093; H, 25.135; E, 25.201; A, 25.236; C, 25.280; K, 25.340;
W, 25.346.  For the lesser observed impacts he finds: D, July 25.060 UT;
B, 25.098; N, 25.107; F, 25.212; M, 25.331.  Visual observations
(communicated via the SL9 message center) around July 23.9 UT by J.
Rogers using the 0.30-m Northumberland refractor at the University of
Cambridge Observatories indicate the following: site L, large and dark,
in several components; combined G + S (+ D), large and complex; R, tiny
black spot south of the main line of spots; Q, single black spot;
H, very dark, north of the main line.  Summarizing recent reports by other
observers, Rogers adds that sites E, A and C are still detectable
(with some fading for A) and that the combined K + W site contains three
or four dark nuclei (M and supposedly U being also in this region).
There do not seem to be confirmed visual sightings of sites B, F (near
E), N (near Q), P, Q2, T (near E) or V (near E).


PERIODIC COMET McNAUGHT-HARTLEY (1994n)
    The following orbital elements, from MPC 23766, confirm this comet
to be of short period (cf. IAUC 6016):

     T = 1994 Nov. 11.202 TT          Peri. = 300.216
     e = 0.61969                      Node  =  38.118   2000.0
     q = 2.60969 AU                   Incl. =  17.655
       a =  6.86205 AU     n = 0.054831     P =  17.98 years

1994 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
July 27    21 28.85    -43 50.2    1.820    2.758  152.0   10.0     15.7
Aug.  6    21 22.41    -44 23.8    1.794    2.732  152.1   10.0     15.6
     16    21 15.39    -44 32.3    1.792    2.709  148.8   11.2     15.6
     26    21 09.01    -44 13.0    1.810    2.688  143.2   13.0     15.6
Sept. 5    21 04.28    -43 26.8    1.849    2.669  136.2   15.2     15.6
     15    21 02.00    -42 16.6    1.905    2.653  128.8   17.2     15.6
     25    21 02.51    -40 47.3    1.977    2.639  121.2   19.0     15.7
Oct.  5    21 05.79    -39 03.1    2.061    2.628  113.7   20.4     15.8


1994 July 25                   (6037)              Brian G. Marsden

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