Central Bureau for Astronomical Telegrams
IAUC 4787: 1989l; 1988k; V404 Cyg
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Read IAUC 4788
Circular No. 4787
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 or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
PERIODIC COMET DU TOIT-NEUJMIN-DELPORTE (1989l)
J. Gibson reports that he has recovered this comet with the
1.5-m reflector + CCD at Palomar as follows:
1989 UT R.A. (1950) Decl. m1
May 22.26339 15 20 16.69 -14 21 05.2 18.5
22.26670 15 20 16.46 -14 21 04.1
22.26992 15 20 16.35 -14 21 03.6
23.29112 15 19 24.01 -14 16 14.0
23.29778 15 19 23.62 -14 16 11.8
23.31285 15 19 22.84 -14 16 07.2
There is a stellar nucleus and perhaps some hint of a faint coma. The
indicated correction to the prediction on MPC 12135 (ephemeris on MPC
14036) is delta T = +0.03 day.
PERIODIC COMET KOPFF (1988k)
K. Jockers, Max-Planck-Institut fur Aeronomie, Katlenburg-Lindau;
and G. Chernova, Institut Astrofiziki, Dushanbe, report: "CCD
photometry of P/Kopff has been performed with the 1-m reflector at the
Hoher List Observatory using a focal reducer and wide-band filters.
During May 6.88-6.94 UT the total magnitude was determined to be 18.5
+/- 0.3 at an effective wavelength of 434 nm and 16.6 +/- 0.3 at 680
nm. The comet is significantly redder than the sun. At the
focal-reducer scale of 1".7 per pixel evidence for an extended coma is
at best marginal."
V404 CYGNI
S. Okamura and W. Tanaka, Kiso Observatory, have identified
the optical counterpart of GS 2023+338 at B = 15 +/- 1 on a plate
taken with the 1.05-m Schmidt on May 28 and give the position as
R.A. = 20 22 06.30 +/- 0.03, Decl. = +33 42'16".7 +/- 0".4
(equinox 1950.0). They estimate from the Palomar Sky Survey
charts that B is approximately 21, R approximately 18.5.
Visual magnitude estimates by P. Schmeer, Bischmisheim, West
Germany: May 28.04 UT, 11.9; 30.02, 12.4; June 1.03, 13.6.
1989 June 1 (4787) Brian G. Marsden
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