Central Bureau for Astronomical Telegrams
IAUC 2275: SN IN Anon GALAXY; 1970g; NOTES FROM THE IAU GA; 1970j; TRANSIT OF PLUTO ACROSS TWO GALAXIES; 1970e
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Circular No. 2275
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
SUPERNOVA IN ANONYMOUS GALAXY
Mr. John Priser, U.S. Naval Observatory, Flagstaff, reports
that he has discovered with the 155-cm astrometric reflector a
supernova in an anonymous galaxy, as follows:
1970 UT R. A. (1950) Decl. mpg
Aug. 29 22 20.2 +35 46 17
The supernova is 13" west and 15" north of the nucleus of the
galaxy. It was slightly fainter on September 3 and was not
observed on a plate exposed on July 31.
COMET ABE (1970g)
Dr. F. D. Miller, University of Michigan, reports that the
filamentary tail was very active on September 2.
Dr. Z. Sekanina, Smithsonian Astrophysical Observatory, points
out that the magnitudes are given incorrectly on IAUC 2270. The
figures given on IAUC 2267 and 2274 are correct.
NOTES FROM THE IAU GENERAL ASSEMBLY
The following three points discussed at the IAU General Assembly
last month concern the Central Telegram Bureau:
Considerable trouble has arisen concerning the appropriate
character to use for a suppressed digit in an astronomical telegram.
At particular times during the past few years the characters Y, X
and - have been used and all have disadvantages. At the meeting of
Commission 6 it was suggested that, while the choice is not perfect,
the use of the slash (/) would on the whole be the most satisfactory.
Not wishing to complicate matters by officially making a
further change in the code, the Central Bureau proposes for the
time being to adopt the slash (/) instead of the hyphen (-); further
observation will reveal whether this is an effective remedy.
At a meeting of Commission 15 consideration was given to the
desirability of alerting observers by telegram when a comet shows
some sudden and particularly interesting physical development (such
as that described by Dr. Miller for comet 197Og on this Circular).
The Central Bureau agreed to cooperate in this matter. This type
of message does not conform with the existing categories of telegrams,
however, and subscribers are therefore requested to contact
the Bureau if they would like to receive such messages; suggestions
concerning the type of information that might be transmitted are
also solicited.
Commission 20 adopted the following resolution: "[It is
recommended that] the notation m1 [be used] for the 'total' magnitude
of a comet and m2 for the 'nuclear' magnitude in the publication
of both observations and ephemerides. The subscripts are consistent
with the code used for the telegraphic reporting of observations."
PERIODIC COMET AREND-RIGAUX (1970j)
An independent recovery of this comet was made by Z. M.
Pereyra, Cordoba Observatory for the CNEGH, with the 154-cm
reflector at Bosque Alegre, as follows. The appearance was stellar.
1970 UT R. A. (1950) Decl. m1
Aug. 1.221 0 26.4 -14 58 20
7.215 0 27.7 -15 53 20
TRANSIT OF PLUTO ACROSS TWO GALAXIES
Mr. J. W. Young writes: "During the last few days of October
the planet Pluto will pass in front of two faint galaxies in the
constellation Coma Berenices. According to the Shapley-Ames
catalogue the two galaxies, NGC 4298 and 4302, are 12.5 and 13.2
mp, respectively. Pluto will be approximately 14.0 mv. Pluto will
be about 24" north of the nucleus of NGC 4298 on October 28d14h UT.
The transit across NGC 4302, a nearly edge-on galaxy, is almost
central and will occur on October 29d22h UT. Observations of these
events forwarded to the following address will be most appreciated
and will be considered in any results to be published at a later
date: ALPO Remote Planets Recorder, Table Mountain Observatory, Jet
Propulsion Laboratory, P.O. Box 367, Wrightwood, CA 92397, U.S.A."
PERIODIC COMET ASHBROOK-JACKSON (1970e)
The following observations have been made at the Perth Observatory,
Bickley, by P. V. Birch, M. P. Candy, B. J. Harris and D.
Gans. Measurers: Birch, Gans and G. Punko.
1970 UT R. A. (1950) Decl. Observer
July 13.78056 18 25 16.58 -42 17 24.6 Birch
30.60486 18 11 43.04 -41 28 16.1 Candy
Aug. 4.64375 18 08 48.89 -41 03 34.4 Harris
5.61667 18 08 15.91 -41 00 18.2 Gans
1970 September 4 (2275) Brian G. Marsden
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