[IAUC] CBET 4242: 20160123 : COMET C/2016 B1 (NEOWISE)
quai en eps.harvard.edu
quai en eps.harvard.edu
Sab Ene 23 03:40:02 ART 2016
Electronic Telegram No. 4242
Central Bureau for Astronomical Telegrams
Mailing address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
COMET C/2016 B1 (NEOWISE)
J. Bauer, Jet Propulsion Laboratory, forwards a report from Emily Kramer
of the discovery of another comet found on infrared images taken with the
Near-Earth Object Wide-field Infrared Survey Explorer (or NEOWISE; formerly
the WISE earth-orbiting satellite; cf. CBET 4225). The discovery observations
from Jan. 17-18 are tabulated below, in which the listed optical-wavelength
magnitude was roughly estimated based on past WISE and NEOWISE cometary
observations. Bauer adds that follow-up observations were obtained by J.
Masiero, A. Shugart, L. Magill, A. Lopez, and M. Gomez with the Gemini 8.0-m
reflector (+ GMOS) at Cerro Pachon, Chile, on Jan. 22.3 UT that show an
obvious coma of red mag 18.8-20.0 with a faint tail extending to the east-
northeast.
2016 UT R.A. (2000) Decl. Mag.
Jan. 17.87360 12 23 55.71 -46 39 51.4 19
17.93918 12 23 57.22 -46 40 15.5
18.00475 12 23 58.66 -46 40 40.0
18.26694 12 24 04.79 -46 42 17.8
18.46368 12 24 09.27 -46 43 32.0
18.59471 12 24 12.32 -46 44 18.1
18.66029 12 24 13.80 -46 44 39.9
18.85703 12 24 18.19 -46 45 51.8
18.98806 12 24 21.35 -46 46 43.6
18.98819 12 24 21.42 -46 46 40.2
After the object was posted on the Minor Planet Center's PCCP webpage, R.
Holmes (Ashmore, IL, USA) writes that CCD images taken by T. Linder and
himself with an 0.61-m f/6.5 Dall-Kirkham astrograph at Cerro Tololo on Jan.
21.34-21.35 UT show a 10" coma without an obvious cometary tail on five
stacked 20-s exposures; the magnitude (stated as V) was measured as 19.0-19.7.
The available astrometry (spanning Jan. 17-22), the following preliminary
parabolic orbital elements by G. V. Williams, and an ephemeris appear on MPEC
2016-B63.
T = 2016 Sept.19.6636 TT Peri. = 338.0745
Node = 239.4108 2000.0
q = 4.272297 AU Incl. = 47.4651
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2016 CBAT
2016 January 23 (CBET 4242) Daniel W. E. Green
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