J/ApJS/255/4 Rotation periods from the K2 Campaign 9 (Podlewska-Gaca+, 2021)
Determination of rotation periods for a large sample of asteroids from
the K2 Campaign 9.
Podlewska-Gaca E., Poleski R., Bartczak P., McDonald I., Pal A.
<Astrophys. J. Suppl. Ser., 255, 4-4 (2021)>
=2021ApJS..255....4P 2021ApJS..255....4P (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Photometry
Keywords: small Solar System bodies - asteroids
Abstract:
The Kepler mission is a powerful tool for the study of different types
of astrophysical objects or events in the distant universe. However,
the spacecraft also provides an opportunity to study solar system
objects passing in the telescope's field of view. The aim of this
paper is to determine, for the first time, the rotation periods of a
number of asteroids observed by the K2 satellite during the K2
Campaign 9. Using publicly available data from the Kepler mission, we
have used the Modified Causal Pixel Model code to perform the
aperture-like and point-response function-like photometry of 1026
asteroids. The results allowed us to determine the rotation periods
for 188 asteroids. For asteroids with rotation periods that were
previously measured, we compared the results and found very good
agreement. There are an additional 20 asteroids for which we obtained
lower limits on rotation periods and in all cases these limits are at
least 100hr.
Description:
Using the data obtained by the K2 satellite during K2C9 we have
extracted the photometry of the asteroids passing in the spacecraft's
field of view.
Our aim was to determine, for the first time, the rotation periods for
a large number of asteroids.
We were able to calculate rotation periods for 187 asteroids, with the
S/N ratio high enough to ensure trustworthy results.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 52 41 Comparison of asteroid rotation periods from the
Asteroid Lightcurve Database (LCDB) and
determined in this paper
table2.dat 56 154 List of asteroids with determined rotation periods
table3.dat 56 33 Rotation periods for asteroids with less certain
rotation period determination than in table 2
table4.dat 34 20 List of asteroids for which we expect long rotation
periods (P>100hr), but the observing time span was
too short to determine the exact value
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
https://archive.stsci.edu/k2 : K2 Home Page
https://sbn.psi.edu/pds/resource/lc.html : Asteroid Lightcurve Database
Home Page
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 Asteroid Number
8- 19 A12 --- Name Name of asteroid
22- 29 F8.5 h PerLCDB Asteroid Lightcurve Database (LCDB) period
31- 32 A2 --- q_PerLCDB LCDB Quality
34- 40 F7.4 h Per Period determined in this paper
42- 47 F6.4 h e_Per Period uncertainty determined in this paper
49- 52 F4.1 --- S/N Signal-to-noise ratio
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID ? Asteroid Number
8- 21 A14 --- Name Name of asteroid
23- 26 I4 --- NPoints Number of Data Points
28- 32 F5.2 d TimeSpan Time Span of Observations
34- 37 F4.1 --- S/N S/N
39- 47 F9.5 h Per Period
49- 56 F8.5 h e_Per Period uncertainty
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID ? Asteroid Number
8- 17 A10 --- Name Name of asteroid
20- 23 I4 --- NPoints Number of Data Points
25- 29 F5.2 d TimeSpan Time Span of Observations
31- 34 I4 h PerMini Estimated Minimal Period
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History:
From Przemyslaw Bartczak, przebar(at)amu.edu.pl
Acknowledgements:
Work by R.P. was supported by the Polish National Agency for Academic
Exchange grant "Polish Returns 2019". This paper includes data
collected by the K2 mission and obtained from the MAST data archive at
the Space Telescope Science Institute (STScI). Funding for the K2
mission is provided by the NASA Science Mission Directorate. STScI is
operated by the Association of Universities for Research in Astronomy,
Inc., under NASA contract NAS 526555.
(End) Patricia Vannier [CDS] 10-Sep-2021