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IAUC 7151: 1999 H3; 1999 CV_3; C/1999 H1

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                                                  Circular No. 7151
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 H3
     An apparently asteroidal object discovered by LINEAR, and noted
on The NEO Confirmation Page, has been reported as cometary by Klet
and Ondrejov observers.  The following observations are available:

     1999 UT             R.A. (2000) Decl.        m1    Observer
     Apr. 22.30901   19 17 19.76   +44 09 48.1   16.8   Shelly
          22.32527   19 17 18.66   +44 10 09.3   17.1     "
          22.33342   19 17 18.04   +44 10 20.0   17.0     "
          22.34245   19 17 17.36   +44 10 33.7   16.8     "
          23.87372   19 15 28.48   +44 44 32.2   15.5   Ticha
          23.87542   19 15 28.31   +44 44 34.2            "
          23.87583   19 15 28.26   +44 44 33.8          Sarounova
          23.87650   19 15 28.25   +44 44 35.6          Ticha
          23.87781   19 15 28.13   +44 44 36.5          Sarounova

F. Shelly, M. Blythe, M. Bezpalko, and M. Elowitz (LINEAR).
  Measurers J. Stuart, H. Viggh, and R. Sayer.  1.0-m f/2.15
  reflector + CCD.
J. Ticha and M. Tichy (Klet).  0.57-m f/5.2 reflector + CCD.  Coma
  diameter >/= 15", wide tail >/= 13" in p.a. 166 deg.
L. Sarounova (Ondrejov).  0.65-m f/3.6 reflector + CCD.  Coma
  diameter > 20"; poor observing conditions.


1999 CV_3
     M. Kidger, Instituto de Astrofiscia de Canarias (IAC),
communicates:  "J. Altozano, J. Marti, I. Ugarte, and D. Hernandez,
Astrophysics Department, La Laguna University, report that analysis
of photometric observations of 1999 CV_3 made with the 0.82-m
IAC-80 Telescope at Teide Observatory on Mar. 5/6 and 6/7, together
with observations by D. Buczinsky (Feb. 22, 0.33-m reflector,
Condor Brow) and N. James (Feb. 13, 0.30-m reflector, Chelmsford),
yields a best-fit lightcurve of period 5.78 +/- 0.06 hr, with a
double maximum of amplitudes 0.4 and 0.25 mag."


COMET C/1999 H1 (LEE)
     Visual m_1 estimates:  Apr. 20.50 UT, 8.3 (S. T. Rae,
Palmerston North, N.Z., 10x50 binoculars); 21.58, 9.0 (M. Mattiazzo,
Wallaroo, S. Australia, 0.20-m reflector); 22.54, 8.7 (A. Pearce,
Nedlands, W. Australia, 0.20-m refl.); 22.96, 8.7 (J. G. de S.
Aguiar, Campinas, Brazil, 0.23-m refl.).

                      (C) Copyright 1999 CBAT
1999 April 23                  (7151)            Daniel W. E. Green

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