Central Bureau for Astronomical Telegrams
IAUC 6692: C/1997 M1; 1997 N1
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Circular No. 6692
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
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Phone 617-495-7244/7440/7444 (for emergency use only)
COMET C/1997 M1 (SOHO)
C. St. Cyr, Naval Research Laboratory, reports, for the SOHO-LASCO
Consortium (see IAUC 6685), his discovery of another comet, fainter
than m1 = 5, in SOHO-LASCO C3 coronagraph images. The object was somewhat
elongated along the sun-comet line, and, as with many of the other Kreutz
members found by SOHO, he considers this elongation to be a faint tail.
Measurements by St. Cyr and S. Stezelberger have been reduced by
G. V. Williams and are given on MPEC 1997-N04 in detail, the approximate
discovery position being as follows:
1997 UT R.A. (2000) Decl.
June 29.801 6 24.0 +19 24
Orbital computations by the undersigned, also given in detail on MPEC
1997-N04, confirm the comet's membership in the Kreutz group and
indicate perihelion passage on June 30.95.
COMET 1997 N1
Vello Tabur reports his visual discovery of a comet, for which the
following observations are available:
1997 UT R.A. (2000) Decl. m1 Observer
July 2.7986 4 48.3 -26 58 10 Tabur
2.8257 4 48.5 -26 58 "
3.79386 4 55 30.93 -26 40 16.4 Garradd
3.79570 4 55 31.73 -26 40 14.3 "
3.79820 4 55 32.81 -26 40 11.6 "
3.80794 4 55 37.09 -26 40 00.4 "
3.81361 4 55 39.57 -26 39 53.8 "
3.82903 4 55 46.41 -26 39 35.3 Child
3.83319 4 55 48.17 -26 39 30.2 "
3.83633 4 55 49.47 -26 39 27.8 "
3.84062 4 55 51.28 -26 39 23.3 "
3.84645 4 55 53.93 -26 39 16.4 "
V. Tabur (Wanniassa, A.C.T.). 0.20-m f/4.7 reflector. Rather uncondensed
circular coma about 1'.5 across, no tail.
G. J. Garradd (Loomberah). 0.25-m f/4.1 reflector + CCD. A 60-s 2 x 2
binned exposure shows a 2'.5 tail in p.a. 210 deg.
J. B. Child (Macquarie). 0.32-m f/4.8 reflector + CCD. 3' tail.
(C) Copyright 1997 CBAT
1997 July 3 (6692) Brian G. Marsden
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