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Title: NEOWISE OBSERVATIONS OF COMET C/2013 A1 (SIDING SPRING) AS IT APPROACHES MARS

Abstract

The Near-Earth Object Wide-field Infrared Survey Explorer mission observed comet C/2013 A1 (Siding Spring) three times at 3.4 μm and 4.6 μm as the comet approached Mars in 2014. The comet is an extremely interesting target since its close approach to Mars in late 2014 will be observed by various spacecraft in situ. The observations were taken in 2014 January, July, and September when the comet was at heliocentric distances of 3.82 AU, 1.88 AU, and 1.48 AU. The level of activity increased significantly between the January and July visits but then decreased by the time of the observations in September, approximately four weeks prior to its close approach to Mars. In this work, we calculate Afρ values and CO/CO{sub 2} production rates.

Authors:
; ;  [1]; ;  [2]
  1. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)
  2. Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States)
Publication Date:
OSTI Identifier:
22364669
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 798; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; ASTROPHYSICS; CARBON DIOXIDE; CARBON MONOXIDE; COMETS; DISTANCE; INFRARED SURVEYS; MARS PLANET

Citation Formats

Stevenson, R., Bauer, J. M., Mainzer, A. K., Cutri, R. M., and Masci, F. J. NEOWISE OBSERVATIONS OF COMET C/2013 A1 (SIDING SPRING) AS IT APPROACHES MARS. United States: N. p., 2015. Web. doi:10.1088/2041-8205/798/2/L31.
Stevenson, R., Bauer, J. M., Mainzer, A. K., Cutri, R. M., & Masci, F. J. NEOWISE OBSERVATIONS OF COMET C/2013 A1 (SIDING SPRING) AS IT APPROACHES MARS. United States. doi:10.1088/2041-8205/798/2/L31.
Stevenson, R., Bauer, J. M., Mainzer, A. K., Cutri, R. M., and Masci, F. J. Sat . "NEOWISE OBSERVATIONS OF COMET C/2013 A1 (SIDING SPRING) AS IT APPROACHES MARS". United States. doi:10.1088/2041-8205/798/2/L31.
@article{osti_22364669,
title = {NEOWISE OBSERVATIONS OF COMET C/2013 A1 (SIDING SPRING) AS IT APPROACHES MARS},
author = {Stevenson, R. and Bauer, J. M. and Mainzer, A. K. and Cutri, R. M. and Masci, F. J.},
abstractNote = {The Near-Earth Object Wide-field Infrared Survey Explorer mission observed comet C/2013 A1 (Siding Spring) three times at 3.4 μm and 4.6 μm as the comet approached Mars in 2014. The comet is an extremely interesting target since its close approach to Mars in late 2014 will be observed by various spacecraft in situ. The observations were taken in 2014 January, July, and September when the comet was at heliocentric distances of 3.82 AU, 1.88 AU, and 1.48 AU. The level of activity increased significantly between the January and July visits but then decreased by the time of the observations in September, approximately four weeks prior to its close approach to Mars. In this work, we calculate Afρ values and CO/CO{sub 2} production rates.},
doi = {10.1088/2041-8205/798/2/L31},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 798,
place = {United States},
year = {Sat Jan 10 00:00:00 EST 2015},
month = {Sat Jan 10 00:00:00 EST 2015}
}