Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7060: 1998en; RX Pup; P/1998 W1

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 7059  SEARCH Read IAUC 7061

View IAUC 7060 in .dvi or .ps format.
IAUC number


                                                 Circular No. 7060
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 1998en IN UGC 3645
     A. V. Filippenko and T. Matheson, University of California at
Berkeley, report that a CCD spectrum (340-1000 nm) obtained on Nov.
25 with the Shane 3-m reflector at Lick Observatory shows that SN
1998en (cf. IAUC 7045) is a type-II supernova.  Broad H-alpha
emission is visible, with less prominent P-Cyg absorption.  The
redshift of the object, determined from narrow emission lines from
a superposed H II region, is 0.021.


RX PUPPIS
     R. J. Ivison, University College, London, writes:
"Spectroscopy from the 4.2-m William Herschel Telescope on Nov. 24
UT shows that the slow optical brightening of the symbiotic
Mira-type variable star RX Pup has been accompanied by its return
to a state of high excitation, with a forest of optical emission
lines now visible.  The Balmer H-alpha emission may be extended --
tentative evidence of a mass-ejection event.  Radio and x-ray
monitoring is urged, as is multicolor photometry and long-slit
spectroscopy."


COMET P/1998 W1 (SPAHR)
     Improved orbital elements from MPEC 1998-W35:

     T = 1999 Jan. 18.858 TT          Peri. = 347.281
     e = 0.51510                      Node  = 101.819   2000.0
     q = 1.72642 AU                   Incl. =  22.077
       a =  3.56033 AU     n = 0.146713     P =   6.72 years

1998/99     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Nov. 23     4 28.29   - 9 36.6   0.887   1.806  148.9   16.4   15.8
Dec.  3     4 19.44   - 7 16.7   0.856   1.781  150.4   15.9   15.7
     13     4 10.73   - 3 59.4   0.846   1.761  148.1   17.2   15.6
     23     4 03.93   + 0 03.5   0.858   1.745  142.6   20.0   15.6
Jan.  2     4 00.44   + 4 33.1   0.890   1.734  135.5   23.4   15.6
     12     4 01.01   + 9 09.6   0.940   1.728  127.8   26.7   15.7
     22     4 05.82   +13 37.4   1.006   1.727  120.3   29.5   15.9

     Total CCD magnitude and coma-diameter estimates:  Nov. 20.25
UT, 15.8, 0'.34 (P. E. Roques, Williams, AZ, 0.25-m reflector +
Kron-Cousins V filter); 23.16, 14.3, 0'.5 (T. Johnston, Boulder,
CO, 0.45-m reflector).

                      (C) Copyright 1998 CBAT
1998 November 25               (7060)            Daniel W. E. Green

Read IAUC 7059  SEARCH Read IAUC 7061

View IAUC 7060 in .dvi or .ps format.


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


Valid HTML 4.01!