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IAUC 8952: P/2008 L1; V5579 Sgr

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                                                  Circular No. 8952
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     R. S. McMillan, Lunar and Planetary Laboratory, University of
Arizona, reports that J. V. Scotti has recovered comet P/1997 V1
(cf. IAUC 6767) with the Spacewatch 1.8-m f/2.7 reflector at Kitt
Peak (recovery observation tabulated below).  On June 9.4 UT,
Scotti described the coma as of diameter 9", and there was a faint
tail extending 0'.15 in p.a. 243 deg; on June 10.4, he gave the
coma diameter as 10", the tail extending 0'.11 in p.a. 252 deg.
The indicated correction to the prediction on MPC 54170 (ephemeris
on MPC 62064) is Delta(T) = -2.0 days.

     2008 UT             R.A. (2000) Decl.       Mag.
     June  9.44185    0 25 34.60   +13 29 14.0   20.2

The available astrometry, the following orbital elements (along
with revised elements for 1997), and an ephemeris appear on MPEC

                    Epoch = 2008 Sept.11.0 TT
     T = 2008 Aug. 25.1744 TT         Peri. = 133.7286
     e = 0.333226                     Node  = 234.8163  2000.0
     q = 3.271999 AU                  Incl. =  12.1214
       a =  4.907208 AU    n = 0.0906677    P =  10.87 years

     R. J. Rudy, D. K. Lynch, R. W. Russell, K. Crawford, and B.
Kaneshiro, Aerospace Corporation; C. E. Woodward, University of
Minnesota; M. Sitko, University of Cincinnati and Space Science
Institute; and M. Skinner, Boeing LTS, report on spectroscopic
observations (range 0.8-13.5 microns) of the nova V5579 Sgr from
May 22 UT.  Data from 0.8-5.2 microns were obtained using the SPEX
instrument at the Infrared Telescope Facility, while measurements
from 3-13.5 microns were acquired with the Advanced Electro-Optical
Telescope using the Aerospace Corporation's Broadband Array
Spectrograph System.  The nova has changed dramatically since the
early observations from May 9 (IAUC 8948).  The dust emission has
increased and now dominates the continuum.  The equivalent widths
of the lines have weakened substantially, and the line profiles now
show a pronounced absorption at their centers.  The excitation of
the emission lines remains low, although the He I line at 1.083
microns is now present.  The dust has cooled significantly and now
has a temperature of 1080 K.

                      (C) Copyright 2008 CBAT
2008 June 13                   (8952)            Daniel W. E. Green

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