2001A&A...379..660L -
Astronomy and Astrophysics, volume 379, 660-663 (2001/11-4)
The 2000 Rosetta asteroid targets observational campaign: 140 Siwa and 4979 Otawara.
LE BRAS A., DOTTO E., FULCHIGNONI M., DORESSOUNDIRAM A., BARUCCI M.A., LE MOUELIC S., FORNI O. and QUIRICO E.
Abstract (from CDS):
Photometric and spectroscopic observations of 140 Siwa and 4979 Otawara, targets of the Rosetta mission, have been carried out at the European Southern Observatory (ESO, Chile). The complete lightcurves in V and R of both asteroids and the Siwa spectrum in the range 0.95-2.52µm have been obtained. We determined the precise synodic rotational period of 140 Siwa (18.495h±0.005h) and we confirmed the synodic rotational period of 4979 Otawara (2.707h±0.005h). The phase function has been obtained for both asteroids, allowing the determination of the HV and GV parameters: for 4979 Otawara HV=14.62mag, GV=0.34; for 140 Siwa HV=8.34mag, GV=0.17. The near infrared spectrum of Siwa does not show any spectral feature, which is consistent with a C/P type object.
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Journal keyword(s):
minor planets, asteroids - solar system: general
(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
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Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
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value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
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quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality)
References (32 between 1850 and 2024) (Total 32)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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