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The color temperature of (2060) Chiron: A warm and small nucleus

1994; Institute of Physics; Volume: 108; Linguagem: Inglês

10.1086/117244

1538-3881

H. Campins, C. M. Telesco, D. J. Osip, G. H. Rieke, Marcia Rieke, B. Schulz,

Geophysics and Gravity Measurements

view Abstract Citations (66) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Color Temperature of (2060) Chiron: A Warm and Small Nucleus Campins, H. ; Telesco, C. M. ; Osip, D. J. ; Rieke, G. H. ; Rieke, M. J. ; Schulz, B. Abstract We present three sets of thermal-infrared observations of (2060) Chiron, obtained in 1991, 1993, and 1994. These observations allow the first estimates of the color temperature of Chiron as well as refined estimates of the radius and albedo of its nucleus. 10/20 micrometer color temperatures of 126-6+11 and 137-9+14 K are obtained from the 1993 and 1994 observations, respectively. These temperatures are consistent with the Standard Thermal Model (STM; Lebofsky & Spencer, 1989), but significantly higher than those predicted by the Isothermal Latitude Model. Our estimates of Chiron's radius based on the STM are in agreement with each other, with the observations of Lebofsky et al. (1984), and with recent occultation results (Buie et al., (1993). We obtained values for the radius of 74 +/- 11 km in 1991, 88 +/- 10 and 104 +/- 10 km in 1993, and, 94 +/- 6 and 91 +/- 13 km in 1994. Publication: The Astronomical Journal Pub Date: December 1994 DOI: 10.1086/117244 Bibcode: 1994AJ....108.2318C Keywords: Albedo; Astronomical Models; Color; Comet Nuclei; Infrared Astronomy; Size Determination; Temperature; Visible Spectrum; Bolometers; Cameras; Infrared Telescopes; Astronomy; PLANETS AND SATELLITES: INDIVIDUAL: CHIRON full text sources ADS |