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IAUC 7199: 1999 L2; 1999ch, 1999ci; C/1998 T1; 29P

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                                                  Circular No. 7199
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  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET 1999 L2
     M. Elowitz and F. Shelly have reported the discovery of a
comet with a coma but no distinct tail in LINEAR data.  In response
to posting on The NEO Confirmation Page, G. R. Viscome (Lake
Placid, NY) reports that the object shows a 16" coma and moderately
strong condensation, but again no discernible tail.  The following
observations are available:

     1999 UT             R.A. (2000) Decl.       Mag.   Observer
     June 11.24296   16 35 06.96   +15 25 47.4   18.6   LINEAR
          11.25596   16 35 06.01   +15 25 23.6   18.9     "
          11.26886   16 35 05.05   +15 24 59.4   19.1     "
          11.29478   16 35 03.06   +15 24 14.3   19.0     "
          12.19718   16 33 58.91   +14 57 15.5   16.5   Viscome
          12.20328   16 33 58.47   +14 57 04.6            "
          12.21365   16 33 57.71   +14 56 45.3   16.5     "


SUPERNOVAE 1999ch AND 1999ci
     A. Gal-Yam and D. Maoz, Tel Aviv University; and R. Pogge,
Ohio State University, communicate:  "Spectrograms (range 360-700
nm) of SNe 1999ch and 1999ci (cf. IAUC 7181), obtained by Pogge
with the Mayall 4-m telescope (+ RC spectrograph) at Kitt Peak on
June 8-9, confirm these to be type-Ia supernovae.  SN 1999ch is
about 4 weeks past maximum brightness, at a redshift of z = 0.15,
consistent with that of Abell 2235 (z = 0.151).  SN 1999ci is about
2 weeks past maximum, at a redshift of z = 0.12, consistent with
that of Abell 1984 (z = 0.124)."


COMET C/1998 T1 (LINEAR)
     Visual m_1 estimates: May 23.88 UT, 11.9 (A. Pearce, Nedlands,
W. Australia, 0.41-m reflector); June 8.67, 10.7 (M. Mattiazzo,
Wallaroo, South Australia, 0.20-m reflector); 9.72, 10.3 (S. T.
Rae, Palmerston North, New Zealand, 0.25-m reflector); 10.65, 10.2
(Rae).


COMET 29P/SCHWASSMANN-WACHMANN 1
     Visual m_1 estimates:  Apr. 12.54 UT, 12.8 (D. A. J. Seargent,
The Entrance, N.S.W., 0.25-m reflector); May 18.33, 13.8 (R. Keen,
Mt. Thorodin, CO, 0.32-cm reflector); 22.72, 13.9 (Pearce); June
12.21, 12.9 (A. Hale, Cloudcroft, NM, 0.41-m reflector).

                      (C) Copyright 1999 CBAT
1999 June 12                   (7199)            Daniel W. E. Green

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