Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 3788: omega Ori; N Ser 1983; SU UMa; 1982f

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 3787 SEARCH Read IAUC 3789
IAUC number 

                                                  Circular No. 3788
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 617-864-5758


omega ORIONIS
     P. K. Barker, Astronomy Department, University of Western
Ontario, reports only minor variations in the optical spectrum of
omega Ori concurrent with the polarimetric and photometric changes
seen by Hayes and by Donahue et al. (IAUC 3777, 3779).
Intensifier-dissector-scanner observations show that H-alpha emission has
increased in strength from intensity 1.6 relative to the continuum
on 1982 Oct. 9 to intensity 1.75 on 1983 Mar. 13.  On both dates
the profile had a weak central reversal with almost equal V and R
peaks separated by 200 km/s.  H-beta shows a very slight emission
increase from 1980 Nov. 26.  On 1983 Mar. 16 the line was almost
completely filled in by double-peaked emission with central
absorption intensity 0.9.


NOVA SERPENTIS 1983
     H. Kosai, Tokyo Astronomical Observatory, provides the
following improved position from a direct plate taken with the Kiso
Schmidt telescope on Mar. 11.8 UT, when the estimated magnitude
was B ~ 12.3: R.A. = 17h53m02s51, Decl. = -14deg00'52".0 (equinox
1950).  His examination of the Palomar Sky Survey prints did not reveal
a candidate for the prenova.

     Further visual magnitude estimates: Mar. 5.20 UT, 13.5 (K.
Locher, Grut, Switzerland); 11.17, 12.9 (Locher); 13.2, 12.5 (M.
Verdenet, Bourbon-Lancy, France).


SU URSAE MAJORIS
     Verdenet provides the following additional visual magnitude
estimates (cf. IAUC 3778): Mar. 1.8 UT, 11.2; 2.8, 10.8; 3.8,
11.0; 6.8, 12.4; 7.8, 12.4; 8.8, 12.9; 9.8, 13.7; 10.8, 13.7.


PERIODIC COMET CHURYUMOV-GERASIMENKO (1982f)
     Total visual magnitude estimates: Feb. 15.84 UT, 11.7 (J.-C.
Merlin, Le Creusot, France, 0.26-m reflector); 19.96, 12.4
(Merlin); Mar. 3.04, 12.3 (J. Bortle, Stormville, NY, 0.32-m
reflector); 6.15, 12.5 (Bortle); 16.14, 12.6 (Bortle).


1983 March 31                  (3788)              Brian G. Marsden

Read IAUC 3787 SEARCH Read IAUC 3789

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

Valid HTML 4.01!