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

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                                                 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

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