Central Bureau for Astronomical Telegrams
IAUC 6036: 1993e; 1994m
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Circular No. 6036
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)
T. Encrenaz, R. Schulz, J. A. Stuewe and G. Wiedemann communicate:
"We report the detection of near-infrared emissions in the H2 S(1) line
(2.12 microns) and in the 3.533-micron H3+ line in the northern
hemisphere of Jupiter at latitude +44 deg and at the longitudes of the
brightest impacts regions. These emissions have been detected with the
IRSPEC imaging spectrometer at the 3.5-m NTT at the European Southern
Observatory. On July 23.017-23.073 UT the northern counterpart of the
R-S-G-Q region was detected both in the H2 and the H3+ lines. The H2 line,
of the same intensity as in the R-S-G-Q region, was superimposed over a
continuum three times weaker than in the corresponding impact region.
The H3+ line was also easily detected, over a weak continuum. Later
(July 23.17 UT), the northern counterparts of sites A and V-T-E-F
were also detected. These emissions disappeared at lower northern
latitude. The presence of emissions at latitude +44 deg was again
confirmed on July 23.83 UT, with the H3+ detection of the northern
counterparts of impacts R-S, Q, H and V-T-E-F. At latitude +44 deg the
H3+ emission is spread over the entire longitude range, with strong maxima
in the northern counterparts of the impact sites. There is little
continuum as compared to the 2.12-micron emission. As suggested by
several other observers, these emissions seem to be the signature of
particle transfer along the lines of the jovian magnetic field."
COMET NAKAMURA-NISHIMURA-MACHHOLZ (1994m)
Improved parabolic orbital elements from MPC 23766:
T = 1994 July 12.902 TT Peri. = 123.005
Node = 158.960 2000.0
q = 1.14088 AU Incl. = 94.388
1994 TT R. A. (2000) Decl. Delta r Elong. Phase m1
July 27 2 41.11 +68 55.1 0.998 1.163 70.6 55.4 8.7
Aug. 1 2 12.44 +67 55.0 0.894 1.181 76.2 56.5 8.5
6 1 38.23 +66 10.6 0.787 1.204 82.9 56.7 8.3
11 0 58.91 +63 09.2 0.682 1.232 91.1 55.3 8.1
16 0 16.48 +57 59.2 0.582 1.264 101.4 51.7 7.8
21 23 34.31 +49 28.5 0.494 1.300 114.9 44.9 7.6
26 22 55.81 +36 28.6 0.431 1.338 132.2 34.0 7.4
31 22 23.13 +19 24.3 0.406 1.380 151.6 20.3 7.4
Sept. 5 21 56.90 + 1 40.6 0.429 1.425 163.2 11.8 7.7
1994 July 24 (6036) Brian G. Marsden
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