J/A+A/550/L11 Lightcurves of Near-Earth Asteroid 162173 (1999 JU3) (Kim+ 2013)
Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition.
Kim M.-J., Choi Y.-J., Moon H.-K., Ishiguro M., Mottola S., Kaplan M.,
Kuroda D., Warjurkar D. S., Takahashi J., Byun Y.-I.
<Astron. Astrophys. 550, L11 (2013)>
=2013A&A...550L..11K 2013A&A...550L..11K
ADC_Keywords: Solar system ; Minor planets ; Photometry, CCD
Keywords: Minor planets, asteroids: individual: (162173) 1999 JU3
Abstract:
Near-Earth asteroid (hereafter NEA) 162173 (1999 JU3) is a potential
target of two asteroid sample return missions not only because of its
accessibility but also because of the first C-type asteroid for
exploration missions. The lightcurve related physical properties of
this object were investigated during the 2011-2012 apparition.
We aim to confirm the physical parameters useful for JAXAs Hayabusa 2
mission such as rotational period, absolute magnitude and phase
function. Our data complement previous studies which did not cover low
phase angles. With optical imagers and 1-2m class telescopes, we
acquired the photometric data at different phase angles. We
independently derived the rotational lightcurve and the phase curve of
the asteroid.
Description:
The files contain asteroid brightness, aspect data and observing
information for corresponding date. These files were used for
obtaining synodic period rotation. Individual lightcurves within a
files are identified with a light curve number, all lightcurves are
relative except UH 2011 data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 81 13 Aspect data and observing information
lc/* . 13 Individual light curves
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See also:
J/A+A/509/A27 : Near-Earth asteroids + QSOs close approaches (Nedelcu+, 2010)
J/A+A/509/A94 : Lightcurves of 14 NEAs (Kwiatkowski+, 2010)
J/A+A/511/A40 : Near Earth Asteroids positions (Birlan+, 2010)
J/A+A/511/A49 : Lightcurves of 12 NEAs (Kwiatkowski+, 2010)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Ast Designation of the asteroid
8- 17 A10 "YYYY/MM/DD" Obs.date Date of observation
19- 28 F10.2 d JD Julian date of observation(1)
30- 34 F5.3 AU r Asteroid-Sun distance (1)
36- 40 F5.3 AU Delta Asteroid-Earth distance (1)
42- 45 F4.1 deg alpha Solar phase angle α (1)
47- 51 F5.1 deg PABLon Phase angle bisector longitude (1)
53- 57 F5.1 deg PABLat Phase angle bisector latitude (1)
59 A1 --- F [R] Filter (R=red)
61- 63 A3 --- Obs Observatory code (2)
65- 66 I2 --- LCN Light curve number
68- 81 A14 --- FileName Name of the light curve file in
subdirectory lc
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Note (1): Coordinates given for the middle of the observation
Note (2): Observatories and codes, as follows:
UH = (568) University of Hawaii, Hawaii, USA
CA = (493) Calar Alto, Almeria, Spain
NH = Nish-Harima Astronomical Observatory, Sayo, Japan
TUG = (A81) Tubitak Ulusal Gozlemevi, Bakirlitepe, Turkey
HCT = Himalayan Chandra Telescope, Hanle, India
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD JD epoch (1)
16- 21 F6.3 mag mag Relative magnitude (for UH 2011, Absolute mag.)
23- 24 I2 --- LCN Light curve number
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Note (1): not corrected for the light travel time.
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Acknowledgements:
Myung-Jin Kim, skarma(at)galaxy.yonsei.ac.kr
(End) Myung-Jin Kim [Yonsei Univ., KASI], Patricia Vannier [CDS] 23-Nov-2012