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IAUC 7201: P/1999 J5; C/1999 H1

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                                                  Circular No. 7201
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 P/1999 J5 (LINEAR)
     An apparently asteroidal object reported by LINEAR on May 12
and 17, and linked by G. V. Williams to LINEAR observations on June
8 and 10 by way of a cometlike orbit, was posted on The NEO
Confirmation Page for additional observations.  P. Pravec and P.
Kusnirak, Ondrejov, reported that their June 12 CCD images showed a
faint coma and a tail marginally visible to the southwest.  Also,
A. Sugie, Dynic Astronomical Observatory, reports strong
condensation and a coma diameter of 12" on June 14.   The discovery
observation is given below, and additional astrometry appears on
MPEC 1999-L35.

     1999 UT             R.A. (2000) Decl.       Mag.
     May  12.35863   16 42 19.96   - 8 28 01.6   19.0

     The following orbital elements by B. G. Marsden, from 41
observations, May 12-June 14, confirm that this comet is of short
period:

     T = 1999 May  12.8389 TT         Peri. = 132.3026
     e = 0.169370                     Node  = 112.0017  2000.0
     q = 3.713551 AU                  Incl. =  13.7214
       a =  4.470763 AU    n = 0.1042633    P =   9.453 years

1999 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
June 11    16 23.84   - 8 40.2   2.740   3.715  161.1    5.1   16.9
     21    16 18.09   - 8 59.9   2.786   3.716  152.4    7.3   16.9
July  1    16 13.44   - 9 27.3   2.857   3.718  142.8    9.5   17.0
     11    16 10.22   -10 01.7   2.949   3.720  133.2   11.5   17.1
     21    16 08.66   -10 42.0   3.060   3.722  123.8   13.1   17.1


COMET C/1999 H1 (LEE)
     J. Davies and T. Kerr, Joint Astronomy Centre, report on
behalf of the collaboration noted on IAUC 7198:  "Moderate
resolution (R about 1000-7000) 2.94-4.75-micron spectra of comet
C/1999 H1 taken at the U.K. Infrared Telescope during May 20-29 UT
showed strong emissions in the C-H stretch region (3.3-3.6 microns).
Assuming that all of the flux in the emission feature centered near
3.51 microns (F = 4.0 x 10E-17 W mE-2 in a 0".61 x 1".83 aperture)
is due to fluorescence from methanol, our preliminary estimate for
the methanol production rate is Q(CH_3OH) = 2.1 x 10E27 sE-1.
Temporal variability was < 20 percent during the period of
observations."

                      (C) Copyright 1999 CBAT
1999 June 14                   (7201)            Daniel W. E. Green

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