Electronic Telegram No. 3912
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET 67P/CHURYUMOV-GERASIMENKO
     S. Gulkis, Jet Propulsion Laboratory, California Institute of Technology,
on behalf of the Microwave Instrument on Rosetta Orbiter (MIRO) science team,
reports that the (1_10)-(1_01) water line at 556.9 GHz was first detected in
Comet 67P with the MIRO instrument aboard the Rosetta spacecraft on June 6.55
UT.  The line area is 0.39 +/- 0.06 K km/s, with a line amplitude of 0.48 +/-
0.06 K and a line width of 0.76 +/- 0.12 km/s.  At the time of the
observations, the spacecraft was about 360000 km from the comet (and r = 3.93
AU).  An initial estimate of the water-production rate, based on the
measurements, is that it lies between 0.5 x 10**25 and 4 x 10**25 molecules/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 June 21                     (CBET 3912)              Daniel W. E. Green