Central Bureau for Astronomical Telegrams
IAUC 5131: SATURN; 1990E; Poss. DWARF N IN Lib; Sgr A*
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Read IAUC 5132
Circular No. 5131
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
SATURN
O. Hainaut, European Southern Observatory, La Silla,
communicates: "The bright spot on Saturn (IAUC 5105, 5109, 5111, and
5115) has been monitored with the 3.5-m New Technology Telescope
and ESO/MPI 2.2-m telescope since Oct. 8 through a number of mostly
narrow filters in the range 350-670 nm. After a few days, during
which the size of the spot remained nearly constant (longitude
about 30 deg), it suddenly (between Oct. 10.1 and 10.9 UT) started
to grow very quickly. At the same time, a very bright point
appeared within the enlarged spot. Since that time, the main spot
has grown so that it now girdles the entire equator, while the
nucleus continues to be visible. In view of the exceptional size
and very unusual behavior of this feature, observers are strongly
encouraged to continue monitoring the size of the spot and to time
the nucleus."
SUPERNOVA 1990E IN NGC 1035
R. Lopez, University of Barcelona, reports: "A low-resolution
spectrum of SN 1990E was taken on Oct. 24 with the faint-object
spectrograph (range 460-980 nm) on the 4.2-m William Herschel Telescope
at La Palma, by G. Gomez, J. A. Rodriguez, A. Aparicio, J. A.
de Diego, and M. Kidger. The spectrum of this type-II supernova
presents emission features attributed to [O I] (630.0 nm), [Ca II]
(729.0, 732.3 nm), and [O II] (731.9, 733.0 nm). The H-alpha feature
shows a well-developed but narrow emission wing, while the
absorption wing is very weak. The velocity of the ejecta, derived
from this feature, is about 4000 km/s."
POSSIBLE DWARF NOVA IN LIBRA
H. Debehogne, Observatoire Royal de Belgique, reports his
discovery of a red variable star evidently embedded in some nebulosity,
located at R.A. = 15h07m31s.10, Decl. = -1 44'01".7 (equinox 1950.0;
from ESO GPO astrograph plates, 1990 Sept. 22-23). His search of
archival plates and atlases suggests that the star normally is of
magnitude 14-16. However, on the Palomar Sky Survey prints (1955 Apr.
20), the object appears at red mag about 9.5 and blue mag about 10.0.
SAGITTARIUS A*
Corrigenda. On IAUC 5125, lines 24-28, for -29 deg read
-28 deg
1990 November 8 (5131) Daniel W. E. Green
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