J/A+A/682/A64 Primordial S-type family catalogue (Bourdelle de Micas+, 2024)
Compositional characterization of a primordial S-type asteroid family of the
inner main belt.
Bourdelle de Micas J., Fornasier S., Delbo M., Ferrone S., van Belle G.,
Ochner P., Avdellidou C.
<Astron. Astrophys. 682, A64 (2024)>
=2024A&A...682A..64B 2024A&A...682A..64B (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Minor planets ; Spectra, infrared ;
Spectra, optical
Keywords: methods: data analysis - methods: observational -
methods: statistical - techniques: spectroscopic -
minor planets, asteroids: general
Abstract:
We present the results of our study about a newly discovered asteroid
family in the inner main belt: the primordial S-type family. From an
initial list of 263 asteroids that are considered as potential members
of the aforementioned primordial family, we retrieved their spectra in
visible and near infrared range from the literature and from the Gaia
DR3 spectral catalog of solar system objects. For asteroids having no
or poor signal-to-noise ratio spectra in the literature, we carried
out new ground-based observations. We obtained new spectra for 33
members of the family using the 1.82m Asiago telescope for the
visible spectroscopy, while for near infrared spectroscopy we used the
3.58m Telescopio Nazionale Galileo (TNG) and the 4.30m Lowell
Discovery Telescope (LDT). In total, we collected spectra of 261
potential members of the primordial S-type family out of 263. We
determined their spectral taxonomy and properties, such as spectral
slopes and absorption bands parameters, when existing. Using the
taxonomical characterization and the orbital space parameters, we
identified and removed 71 interlopers from the potential members list.
The final list of the primordial S-type family members includes 190
asteroids.
Description:
This catalogue is based on the spectral study of a newly discovered
asteroid family: the PSTF. We carried out visible and near-infrared
spectroscopic ground-based observation of 33 members of that family,
that has no or a poor S/N spectra in literature. We used three
different telescopes: the 1.8m Copernico, in Italy, the 3.58m TNG,
based at La Palma and the 4.30m Lowell Discovery Telescopy, in the
USA.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
members.dat 101 261 List of family members
obs.dat 83 44 Summary of observations
list.dat 53 2 List of fits images of spectra
fits/* . 2 Individual fits images of spectra
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Byte-by-byte Description of file: members.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Object Number and name of the object
25- 29 F5.2 km D Diameter
31- 35 F5.3 --- pv Geometric albedo value
37- 41 F5.3 --- e_pv Uncertainties of geometric albedo value
43- 47 F5.3 ua a Semimajor axis
49- 52 F4.2 --- e Eccentricity
54- 57 F4.2 --- sin(i) Sinus of inclination
59- 68 A10 --- Tax Taxonomical classification
71- 75 F5.2 0.01%/nm Sall Slope value of the entire spectra
(in %/1000Å unit)
77- 80 F4.2 0.01%/nm e_Sall Uncertainties of the slope value (total)
(in %/1000Å unit)
82- 86 F5.2 0.01%/nm Svis Slope value of the visible part of the
spectra (in %/1000Å unit)
88- 91 F4.2 0.01%/nm e_Svis Uncertainties of the slope value (visible)
(in %/1000Å unit)
93- 95 A3 --- Interloper [Yes No] Members of the family ?
97-101 A5 --- Ref Literature references (1)
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Note (1): References as follows:
1 = This work
2 = Gaia data
3 = Bus & Binzel, 2002, Icarus, 158, 146
4 = Bell et al., 2005, NASA Planetary Data 835 System, EAR
5 = Reddy & Sanchez 2016, NASA Planetary Data System, EAR
6 = Lazzaro et al., 2004, Icarus, 172, 179
7 = Burbine & Binzel, 2002, Icarus, 159, 468
8 = MITHNEOS data
9 = Xu et al., 1995, Icarus, 115, 1
10 = Hardersen, 2016, NASA Planetary Data System, EAR
11 = Moskovitz et al., 2010, Icarus, 208, 773
12 = Sunshine et al., 2007, Journal of Maps, 42, 155
13 = Lindsay et al., 2015, Icarus, 247, 53
14 = Fieber-Beyer & Gaey, 2015, Icarus, 257, 113
15 = Hardersen et al., 2015, ApJS, 221, 19
16 = Binzel et al., 2019, Icarus, 324, 41
17 = Avdellidou et al., 2022, A&A, 665, L9
18 = Fornasier et al., 2008, Icarus, 196, 119
19 = Binzel et al., 2004, Icarus, 170, 259
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Byte-by-byte Description of file: obs.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Object Number and name of the object
19- 28 A10 "date" Date Date of the observations (DD/MM/YYYY)
30- 34 A5 "h:m" UT Hour of the observation (in UTC)
36- 41 A6 s Exp Exposition time (1)
43- 46 F4.1 mag vmag Visual magnitude
48- 51 F4.1 deg a Phase angle
53- 56 F4.2 --- Airm Airmass of the asteroid
58- 67 A10 --- SA Solar analog star used for reduction
69- 72 F4.2 --- SAAirm Airmass of the considered Solar analog
74- 78 A5 --- Instr Instrument used for observations
80- 83 F4.2 arcsec Slit Length of the slit used
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Note (1): X*Y means the acquisition occured X times of Y seconds
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Nx Number of pixels along X-axis
6- 9 I4 --- Ny Number of pixels along Y-axis
11 I1 --- Nz Number of images
13- 16 I4 Kibyte size Size of FITS file
18- 35 A18 --- FileName Name of FITS file, in subdirectory fits
37- 53 A17 --- Title Title of the FITS file
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Acknowledgements:
Jules Bourdelle de Micas, jules.bourdelledemicas(at)inaf.it
(End) Jules Bourdelle de Micas [INAF], Patricia Vannier [CDS] 27-Dec-2023