J/MNRAS/458/1117 Possible Ceres asteroid paleo-family (Carruba+, 2016)
Footprints of a possible Ceres asteroid paleo-family.
Carruba V., Nesvorny D., Marchi S., Aljbaae S.
<Mon. Not. R. Astron. Soc., 458, 1117-1126 (2016)>
=2016MNRAS.458.1117C 2016MNRAS.458.1117C (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Minor planets
Keywords: celestial mechanics - minor planets, asteroids: general -
minor planets, asteroids: individual: Ceres
Abstract:
Ceres is the largest and most massive body in the asteroid main belt.
Observational data from the Dawn spacecraft reveal the presence of at
least two impact craters about 280km in diameter on the Ceres
surface, that could have expelled a significant number of fragments.
Yet, standard techniques for identifying dynamical asteroid families
have not detected any Ceres family. In this work, we argue that linear
secular resonances with Ceres deplete the population of objects near
Ceres. Also, because of the high escape velocity from Ceres, family
members are expected to be very dispersed, with a considerable
fraction of km-sized fragments that should be able to reach the
pristine region of the main belt, the area between the 5J:-2A and
7J:-3A mean-motion resonances, where the observed number of asteroids
is low. Rather than looking for possible Ceres family members near
Ceres, here we propose to search in the pristine region.
Description:
We identified 156 asteroids whose taxonomy, colours, albedo could be
compatible with being fragments from Ceres. Remarkably, most of these
objects have inclinations near that of Ceres itself.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 52 150 Photometric and albedo Ceres family candidates
in the pristine region with D<20km
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID Identification number
7 A1 --- n_ID [+] Note on ID (1)
8 A1 --- f_ID [*] * for asteroids that satisfied our
selection criteria (2)
10- 17 F8.6 AU amaj Semimajor axis (au)
19- 26 F8.6 --- Ecc Eccentricity
28- 35 F8.6 --- sini Sine of inclination, sin(i)
37- 41 F5.2 mag H Absolute H magnitude
43- 47 F5.2 km Diam Estimated diameter (km)
49- 52 A4 --- Type Photometric (SDSS) or albedo (WISE)
C-type candidate
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Note (1): + for asteroids in the expected inclination range of the Ceres family
Note (2): * for the 45 asteroids that satisfied our selection criteria for
Fig. 6, panel B.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Feb-2017