Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4206: 1986F; 1986E; Occns BY PLUTO AND ITS Sat; P/SCHWASSMANN-WACHMANN 1; SW UMa

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 4205 SEARCH Read IAUC 4207
IAUC number 

                                                  Circular No. 4206
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


SUPERNOVA 1986F IN NGC 5253
     R. Evans, Hazelbrook, N.S.W., reports his discovery on April
24.5 UT of a supernova of mag 13 located 10" east and 20" north of
the nucleus of NGC 5253 (R.A. = 13h37m1, Decl. = -31deg24', equinox 1950.0).
The bright supernovae 1895B and 1972E occurred in this same galaxy.


SUPERNOVA 1986E IN NGC 4302
     D. L. King, Royal Greenwich Observatory, provides the following
precise position from a 32-min exposure with the 0.66-m refractor
at Herstmonceux on Apr. 17: R.A. = 12h19m09s05, Decl. = +14deg54'33"3
(equinox 1950.0).  The reduction was made using eight AGK3 stars,
and rms errors were 0"4.  There is a nearby foreground star, located
at R.A. = 12h19m08s58, Decl. = +14deg54'33"9 (equinox 1950.0) and
considerably fainter than the supernova at the time of observation.


OCCULTATIONS BY PLUTO AND ITS SATELLITE
     Further to the note on IAUC 4203, D. Mink, Center for
Astrophysics, informs us that the Apr. 30 event (P4) should also yield
an occultation by Pluto I (Charon): a recent relative position,
furnished by E. Tedesco, of Charon relative to Pluto suggests that
the occultation by Charon may be observable from New Zealand and
Australia a few minutes after the occultation by Pluto in the
central Pacific.  The maximum duration will be about 1 min.  There
will be no Charon occultation at the P5 event on June 22.


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Total visual magnitude estimate (cf. IAUC 4200) by J.-C.
Merlin (Sao Francisco de Oliveira, Brazil, 0.31-m reflector): Apr.
7.17 UT, 12.7.  J. V. Scotti, Lunar and Planetary Laboratory,
informs us that Spacewatch CCD observations by T. Gehrels at Kitt
Peak on Apr. 15 indicated that the comet was then considerably
fainter.  CCD observations by W. Wisniewski at Cerro Tololo on
Mar. 16 and 17 put the comet then at B = 18.4 (8" diaphragm).


SW URSAE MAJORIS
     Further visual magnitude estimates by S. Korth (cf. IAUC
4198): Mar. 23.82 UT, 13.4; Apr. 11.84, 14.2; Apr. 12.86, 13.7:.


1986 April 24                  (4206)              Brian G. Marsden

Read IAUC 4205 SEARCH Read IAUC 4207

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

Valid HTML 4.01!