Electronic Telegram No. 2529 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 103P/HARTLEY M. J. Mumma, B. P. Bonev, M. A. DiSanti, L. Paganini, G. L. Villanueva, and Y. L. Radeva, Goddard Space Flight Center (GSFC); E. L. Gibb, University of Missouri at St. Louis; K. Magee-Sauer, Rowan University; and J. V. Keane and K. J. Meech, University of Hawaii, report: "In collaborative runs in mid-October, we acquired high-resolution infrared spectra with NIRSPEC at the Keck Observatory. They reveal strong detections of OH* (prompt emission), many lines of water and HCN, plus detections of the H_2CO Q-branch (nu_1, 2781 cm**-1), C_2H_6, and CH_3OH. Additional trace species are under evaluation. The quantitative results given below are provisional." J. V. Keane and K. J. Meech, University of Hawaii, and the above team members report that on Oct. 19.5 UT the slit was oriented along the direction of the CN jet (p.a. 350 degrees). H_2O was symmetric about the nucleus, but C_2H_6 was extended in the jet's direction. Preliminary production rates, rotational temperatures, and abundance ratios (percent relative to water) are: H_2O (23 lines), 4.8 +/- 0.1 x 10**27 s-1, 75 +/- 2 K, 100 percent; C_2H_6 (many Q-branches) 2.96 +/- 0.23 x 10**25 s-1, 75 K (assumed), 0.61 percent; CH_3OH (Q-branch nu_2-band), 11.2 +/- 0.72 x 10**25 s-1, 75K (assumed), 2.3 percent. B. P. Bonev, Catholic University and GSFC; and the above team members report that on Oct. 22.5 UT the slit was oriented along the sun-comet line. Spatial profiles for hydrogen cyanide, methanol, ethane, and water are fairly symmetric about the nucleus. Preliminary production rates, rotational temperatures, and abundance ratios (percent relative to water) are: H_2O (20 lines), 7.2 +/- 0.29 x 10**27 s-1, 77 +/- 2 K, 100 percent; HCN (12 lines), 1.7 +/- 0.1 x 10**25 s-1, 80 K (assumed), 0.24 percent; C_2H_6 (many Q-branches), 2.96 +/- 0.23 x 10**25 s-1, 75 K (assumed), 0.61 percent; CH_3OH (Q-branch nu_2-band), 11.2 +/- 0.72 x 10**25 s-1, 75 K (assumed), 2.3 percent. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 November 4 (CBET 2529) Daniel W. E. Green