Content
asteroid: (87)Sylvia
satellites: 1 - Remus: 20
2 - Romulus: 45
total number: 65
type: relative
dates: 2001-2011
observatory: 309 - Cerro Paranal (European Southern Observatory, Chile)
568 - Mauna Kea (Keck observatory)
250 - HST
Reference
J. Fang, J-L. Margot, P. Rojo.
Orbits, masses, and evolution of main belt triple (87) Sylvia.
The Astronomical Journal. 2012. V. 144:70. 13pp.
2012AJ....144...70F
Information
relative to: the primary
reference frame: astrometric ICRF
centre of frame: topocenter
time scale: UTC
reduction: no
coordinates: PA, Sep, X,Y (secondary relative to primary)
receptor: CCD
telescopes: 1 - VLT 8m (NACO)
2 – Keck II (NIRC2)
3 - HST
Comment.
1. The position angle (PA; degrees east of north) and the Sep - separation
of each satellite relative to the primary are measured.
2. These values are converted to positions X and Y, where the positive
x-direction is toward the west and the positive y-direction is toward
the north. We assign the instrument plate scale as the positional uncertainty Sigma for X and Y.
3. "0.0" in the table means the absense of data.
Format
1. Year of the moment of observation
2. Month of the moment of observation
3. Day of the moment of observation
4 MJD - modified Julian day
5. Nsat - number of satellite
6. PA - the position angle (deg)
7. Sep - separation of each satellite relative to the primary (arcsec)
8. X (arcsec) - relative right ascension
9. Y (arcsec) - relative declination
10. Sigma – the positional uncertainty sigma for X and Y.
11. Ntel - number of telescope
12. Code - Code of observatory
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Year MJD Nsat PA Sep X Y Sigma Ntel Code
Month deg arcsec arcsec arcsec arcsec
Day
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