IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 5347: SNe; 1991o; Sats OF SATURN AND NEPTUNE

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 5346  SEARCH Read IAUC 5348
IAUC number


                                                  Circular No. 5347
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


SUPERNOVAE
     A. V. Filippenko and T. Matheson, University of California at
Berkeley, report that CCD spectra (range 390-710 nm, resolution 1 nm)
of several recent supernovae were obtained on Sept. 16 UT with the
Shane 3-m reflector at the Lick Observatory.  SN 1991ar is probably of
type II, but the P-Cygni profile of Na D is much more prominent than
that of H alpha or H beta.  They confirm that SNe 1991as, 1991at and
1991au are of types Ia, Ia and probably II, respectively.  SN 1991av
is of type II, but the spectrum is peculiar: strong, relatively narrow
Balmer emission lines, and weaker He I 587.6-nm emission, are
superposed on a nearly featureless blue continuum; the spectrum
resembles that of SN 1991ae (cf. IAUC 5287, 5294).


PERIODIC COMET CHERNYKH (1991o)
     J. Luu, Harvard-Smithsonian Center for Astrophysics; and D.
Jewitt, Institute for Astronomy, University of Hawaii, communicate:
"We have discovered that P/Chernykh has split.  Observations with the
2.4-m telescope of the Michigan-Dartmouth-MIT Observatory on Sept. 15
and 16 show that the secondary nucleus is separated from the primary
by 56".6 +/- 0".7 in p.a. 71 +/- 1 deg.  Both primary and secondary
objects appear extended.  The Mould R magnitudes of the primary and
secondary are 16.1 and 19.1, respectively, measured within an
11".7-diameter diaphragm.  Neither the separation nor the difference
in magnitudes changed between nights."


SATELLITES OF SATURN AND NEPTUNE
     The IAU Executive Committee has approved the following new
designations and names:

     Saturn XVIII  Pan       = 1981 S13
     Neptune III   Naiad     = 1989 N6
     Neptune IV    Thalassa  = 1989 N5
     Neptune V     Despina   = 1989 N3
     Neptune VI    Galatea   = 1989 N4
     Neptune VII   Larissa   = 1989 N2
     Neptune VIII  Proteus   = 1989 N1

The satellites of Neptune are numbered in order of increasing distance
from the primary.


1991 September 16              (5347)              Brian G. Marsden

Read IAUC 5346  SEARCH Read IAUC 5348


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!