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J/ApJ/789/151     Properties of asteroids in comet-like orbits      (Kim+, 2014)

Physical properties of asteroids in comet-like orbits in infrared asteroid survey catalogs. Kim Y., Ishiguro M., Usui F. <Astrophys. J., 789, 151 (2014)> =2014ApJ...789..151K (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Comets Keywords: comets: general - minor planets, asteroids: general Abstract: We investigated the population of asteroids in comet-like orbits using available asteroid size and albedo catalogs of data taken with the Infrared Astronomical Satellite, AKARI, and the Wide-field Infrared Survey Explorer on the basis of their orbital properties (i.e., the Tisserand parameter with respect to Jupiter, TJ, and the aphelion distance, Q). We found that (1) there are 123 asteroids in comet-like orbits by our criteria (i.e., Q > 4.5 AU and TJ< 3), (2) 80% of them have low albedo, pv< 0.1, consistent with comet nuclei, (3) the low-albedo objects among them have a size distribution shallower than that of active comet nuclei, that is, the power index of the cumulative size distribution is around 1.1, and (4) unexpectedly, a considerable number (i.e., 25 by our criteria) of asteroids in comet-like orbits have high albedo, pv> 0.1. We noticed that such high-albedo objects mostly consist of small (D < 3 km) bodies distributed in near-Earth space (with perihelion distance of q < 1.3 AU). We suggest that such high-albedo, small objects were susceptible to the Yarkovsky effect and drifted into comet-like orbits via chaotic resonances with planets. Description: We used infrared asteroid databases compiled from three infrared all-sky surveyors, the IRAS (Neugebauer et al. 1984ApJ...278L..83N), AKARI (Murakami et al. 2007PASJ...59S.369M), and the Wide-field Infrared Survey Explorer (WISE; Wright et al. 2010AJ....140.1868W). Usui et al. (2014, J/PASJ/63/1117) compared these three infrared asteroid catalogs with valid sizes and albedos and merged them into a single catalog (I-A-W). They archived 138,285 asteroids with sizes and albedos, detected with either IRAS, AKARI, or WISE in I-A-W. A number of asteroids were detected by two or three satellites: 1993 asteroids by all three satellites, 2812 asteroids by AKARI and WISE, and 312 asteroids by IRAS and WISE. In such cases, Usui et al. (2014, J/PASJ/63/1117) selected data from AKARI as the highest priority, WISE as the second, and IRAS as the third priority, although there are no remarkable differences in the sizes and albedos among these catalogs. AKARI data were given highest priority because its data have less uncertainty than WISE in the sizes and albedos for the largest asteroids. We used the I-A-W catalog in the analysis of ACOs. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 92 123 Asteroids in Comet-like Orbits in Infrared Asteroidal Survey Catalogs
See also: B/astorb : Orbits of Minor Planets (Bowell+ 2014) J/PASJ/63/1117 : Asteroid catalog using AKARI (AcuA). V1. (Usui+, 2011) J/AJ/151/164 : Properties of asteroids in Karin cluster (Carruba+, 2016) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Number Asteroid number 8- 20 A13 --- Name Asteroid name 22- 31 A10 --- Desig Asteroid provisional designation 33- 39 F7.3 AU a Semimajor axis 41- 45 F5.3 --- e Eccentricity 47- 52 F6.2 deg i Inclination 54- 59 F6.3 --- TJ Tisserand parameter with respect to Jupiter 61- 67 F7.3 km D Diameter 69- 74 F6.3 km e_D The uncertainty in diameter 76- 80 F5.3 --- pV Geometric albedo 82- 86 F5.3 --- e_pV The uncertainty in albedo 88- 92 A5 --- Source Observation source (1)
Note (1): Observation source as follows : AKARI = AKARI, 2010, Cat. II/297, II/298 IRAS = IRAS-PSC, 1986, Cat. II/125 WISE = WISE, 2012, Cat. II/311
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 13-Mar-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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