J/A+A/654/A48 V-band photometry of asteroids from ASAS-SN (Hanus+, 2021)
V-band photometry of asteroids from ASAS-SN, Finding asteroids with slow spin.
Hanus J., Pejch O., Shappee B.J., Kochanek C.S., Stanek K.Z.,
Holoien T.W.-S.
<Astron. Astrophys. 654, A48 (2021)>
=2021A&A...654A..48H 2021A&A...654A..48H (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Minor planets ; Photometry, CCD
Keywords: minor planets, asteroids: general - surveys -
methods: observational - methods: data analysis
Abstract:
We present V-band photometry of the 20000 brightest asteroids using
data from the All-Sky Automated Survey for Supernovae (ASAS-SN)
between 2012 and 2018. We were able to apply the convex inversion
method to more than 5000 asteroids with more than 60 good
measurements in order to derive their sidereal rotation periods, spin
axis orientations, and shape models. We derive unique spin state and
shape solutions for 760 asteroids, including 163 new determinations.
This corresponds to a success rate of about 15%, which is
significantly higher than the success rate previously achieved using
photometry from surveys. We derive the first sidereal rotation periods
for additional 69 asteroids. We find good agreement in spin periods
and pole orientations for objects with prior solutions. We obtain a
statistical sample of asteroid physical properties that is sufficient
for the detection of several previously known trends, such as the
underrepresentation of slow rotators in current databases, and the
anisotropic distribution of spin orientations driven by the
nongravitational forces. We also investigate the dependence of spin
orientations on the rotation period. Since 2018, ASAS-SNhas been
observing the sky with higher cadence and a deeper limiting magnitude,
which will lead to many more new solutions in just a few years.
Description:
Table A.1: Extracted ASAS-SN V-band data.
Table A.2: Physical properties of asteroids with new shape model
determinations based on the V-band ASAS-SN data.
Table A.3: Physical properties of asteroids with revised shape model
determinations based on the V-band ASAS-SN data and comparison with the.
DAMIT database.
Table A.4: Physical properties of asteroids with new rotation period
determinations based on the V-band ASAS-SN data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
lc.dat 24 19402 List of asteroids with light curves data in
tablea1.dat
tablea2.dat 71 163 New physical properties
tablea3.dat 103 597 Comparison with DAMIT
tablea4.dat 46 69 New rotation periods
tablea1.dat 53 1836613 ASAS-SN V-band photometry for 19402 asteroids
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
Byte-by-byte Description of file: lc.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Number Asteroid number
8- 24 A17 --- Name Asteroid name
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Number Asteroid number
7- 18 A12 --- Name Asteroid name
20- 22 I3 deg Lambda1 Ecliptic longitude of model 1
24- 26 I3 deg Beta1 Ecliptic latitude of model 1
28- 30 I3 deg Lambda2 ? Ecliptic longitude of model 2
33- 35 I3 deg Beta2 ? Ecliptic latitude of model 2
38- 47 F10.5 h P Sidereal rotation period
49- 50 A2 --- M Method(s) used for period determination
52- 54 I3 --- N(ASAS-SN) Number of ASAS-SN measurements
56- 62 F7.2 h P(LCDB) ? Rotation period from LCDB
64- 65 A2 --- Flag(LCDB) Validity flag of P(LCDB)
67- 71 F5.1 km D ? Size
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Number Asteroid number
7- 21 A15 --- Name Asteroid name
23- 25 I3 deg Lambda1 Ecliptic longitude of model 1
27- 30 I4 deg Beta1 Ecliptic latitude of model 1
32- 34 I3 deg Lambda2 ? Ecliptic longitude of model 2
37- 40 I4 deg Beta2 ? Ecliptic latitude of model 2
43- 51 F9.5 h P Sidereal rotation period
53- 54 A2 --- M Method(s) used for period determination
56- 58 I3 --- N(ASAS-SN) Number of ASAS-SN measurements
60- 65 F6.2 h P(LCDB) ? Rotation period from LCDB
68- 69 A2 --- Flag(LCDB) Validity flag of P(LCDB)
71- 75 F5.1 km D ? Size
77- 79 I3 deg LambdaD1 Ecliptic longitude of DAMIT model 1
81- 83 I3 deg BetaD1 Ecliptic latitude of DAMIT model 1
85- 87 I3 deg LambdaD2 ? Ecliptic longitude of DAMIT model 2
90- 92 I3 deg BetaD2 ? Ecliptic latitude of DAMIT model 2
95-103 F9.5 h PD Sidereal rotation period of DAMIT model
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Number Asteroid number
8- 19 A12 --- Name Asteroid name
22- 31 F10.5 h Period Sidereal rotation period
34- 35 A2 --- Method Method(s) used for period determination
38- 40 I3 --- N(ASAS-SN) Number of ASAS-SN measurements
43- 46 F4.1 km D ?=- Size
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Number Asteroid number
8- 24 A17 --- Name Asteroid name
26- 38 F13.5 d JD Julian date
40- 45 F6.3 mag Vmag V-band brightness
47- 51 F5.3 mag e_Vmag Uncertainty in the V-band brightness
53 I1 --- Flag [0/1] Flag indicating the usage in CI
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Acknowledgements:
Josef Hanus, hanus.home(at)gmail.com,
Institute of Astronomy, Charles University, Czech Republic
(End) J. Hanus [Inst. Astron., Czech Republic], P. Vannier [CDS] 23-Sep-2021