Central Bureau for Astronomical Telegrams
IAUC 4935: CCO; 1989e1; BF Cyg
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Circular No. 4935
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
CATALOGUE OF COMETARY ORBITS
The sixth edition of the Catalogue of Cometary Orbits, a joint
publication of the Central Bureau for Astronomical Telegrams and Minor
Planet Center, is now available. The 1292 entries (complete through
1989 Nov.) represent a 9-percent increase over the 1986 edition, but
since some of the statistical tables are omitted they are contained in
only 96 pages; new features are a table giving the 'original' and
'future' barycentric reciprocal semimajor axes for the 264 long-period
comets with well-determined orbits and a listing of the correspondences
of provisional and Roman numeral designations in order of the former.
Subscribers to these Circulars may purchase the new edition for $7.50
(half the cost to nonsubscribers), and arrangements can be made to debit
a subscription account accordingly. The basic catalogue (including the
comet names) and the listing of original and future orbits are also
being issued in ASCII files, together with programs to extract specific
orbits and calculate ephemerides (although these programs require an
8087 mathematical coprocessor), on an MS-DOS 5.25-inch 2S2D diskette for
$75.00. The catalogue (but not the programs) is also available by
e-mail (cost $37.50) or on magnetic tape (cost $300.00).
COMET SKORICHENKO-GEORGE (1989e1)
Concerning the independent discovery reported on IAUC 4929,
K. I. Churyumov, Kiev Observatory, reports that discoverer Boris
Nikolaevich Skorichenko of Mezmai, near Krasnodar, R.S.F.S.R., was
using a 0.15-m reflector.
BF CYGNI
R. Viotti and A. Damineli, Istituto Astrofisica Spaziale CNR,
Frascati; and C. Rossi and A. Altamore, Istituto Astronomico,
Universita La Sapienza, Rome, write: "Near-infrared spectra of
the recently-brightened symbiotic star BF Cyg secured on Nov. 14.7
UT with the Bologna Observatory 1.5-m telescope show, over the
intense M spectrum, prominent emissions of Paschen lines (P-delta,
equivalent width Weq = 0.08 nm; P-gamma, Weq about 0.3) and Fe II
(999.7 nm; Weq = 0.13 nm). He I (1083 nm) displays a strong
emission with Weq about 0.2 nm, and a possible P-Cyg absorption."
1989 December 30 (4935) Daniel W. E. Green
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