J/A+A/572/A29 Asteroids for a targeted spectroscopic survey (Oszkiewicz+, 2014)
Selecting asteroids for a targeted spectroscopic survey.
Oszkiewicz D.A., Kwiatkowski T., Tomov T., Birlan M., Geier S., Penttila A.,
Polinska M.
<Astron. Astrophys. 572, A29 (2014)>
=2014A&A...572A..29O 2014A&A...572A..29O
ADC_Keywords: Minor planets
Keywords: methods: statistical - techniques: photometric -
minor planets: asteroids: general
Abstract:
Asteroid spectroscopy reflects surface mineralogy. There are few
thousand asteroids whose surfaces have been observed spectrally.
Determining the surface properties of those objects is important for
many practical and scientific applications, such as for example
developing impact deflection strategies or studying history and
evolution of the Solar System and planet formation.
The aim of this study is to develop a pre-selection method that can be
utilized in searching for asteroids of any taxonomic complex. The
method could then be utilized im multiple applications such as
searching for the missing V-types or looking for primitive asteroids.
We used the Bayes Naive Classifier combined with observations obtained
in the course of the Sloan Digital Sky Survey and the Wide-field
Infrared Survey Explorer surveys as well as a database of asteroid
phase curves for asteroids with known taxonomic type. Using the new
classification method we have selected a number of possible V-type
candidates. Some of the candidates were than spectrally observed at
the Nordic Optical Telescope and South African Large Telescope.
We have developed and tested the new pre-selection method. We found
three asteroids in the mid/outer Main Belt that are likely of
differentiated type. Near-Infrared are still required to confirm this
discovery. Similarly to other studies we found that V-type candidates
cluster around the Vesta family and are rare in the mid-to-outer Main
Belt.
The new method shows that even largely explored large databases
combined together could still be further exploited in for example
solving the missing dunite problem.
Description:
Comparison of V-type candidates indicated in other studies and in this
work. Probabilities of an object beeing of basaltic V-type is
indicated.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 94 85 V-type candidates in the mid and outer Main Belt
tablea1.dat 81 584 Basaltic candidates targeted in other studies
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID Asteroid designation
8 A1 --- n_ID [*] * for objects already confirmed in
previous studies
10- 13 F4.2 AU a Proper semi-major axis
15- 18 F4.2 --- e [0/1] Proper eccentricity
20- 23 F4.2 --- sini [0/1] Sine of proper inclination
25- 28 F4.2 --- pr.B [0/1] Probability of having basaltic surface as
computed in this study
30- 94 A65 --- Com Comments
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- ID Asteroid designation
6- 8 A3 --- m_ID Multiplicity index on ID ((S) or (A))
9 A1 --- n_ID [*] * for objects already confirmed in
previous studies
11- 14 F4.2 AU a Proper semi-major axis
16- 19 F4.2 --- e [0/1] Proper eccentricity
21- 24 F4.2 --- sini [0/1] Sine of proper inclination
27- 31 A5 --- M08 [False/True ] Candidate in Moskovitz et al..
2008Icar..198...77M 2008Icar..198...77M
34- 38 A5 --- RH06 [False/True ] Candidate in Roig et al.,
2006Icar..183..411R 2006Icar..183..411R
41- 45 A5 --- AVAST [False/True ] Candidate in Solontoi et al.,
2012Icar..220..577S 2012Icar..220..577S
50- 51 A2 --- Type Predicted taxonomic type
53- 56 F4.2 --- pr.B [0/1] Probability of having basaltic surface as
computed in this study
58 A1 --- --- [(]
59- 62 F4.2 --- pr.V [0/1]? Probability of object being of V-type if
the most likely type is other than V
63 A1 --- --- [)]
65- 81 A17 --- Com Other solution for Type, Prob and ProbV
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Acknowledgements:
Dagmara Oszkiewicz, dagmara.oszkiewicz(at)amu.edu.pl
(End) Dagmara Oszkiewicz [UAM, Poland], Patricia Vannier [CDS] 24-Sep-2014