107 Camilla (pronounced /kəˈmɪlə/ kə-MIL-ə) is one of the largest main belt asteroids. It orbits within the Cybele Group, beyond most of the main belt asteroids. It has a very dark surface and primitive carbonaceous composition. It was discovered by N. R. Pogson on November 17, 1868 and named after Camilla, Queen of the Volsci in Roman mythology.
Lightcurve analysis indicates that Camilla's pole most likely points towards ecliptic coordinates (β, λ) = (+51°, 72°) with a 10° uncertainty , which gives it an axial tilt of 29°.
Satellite (S/2001 (107) I)
On 1 March 2001, a satellite of Camilla was found by A. Storrs, F. Vilas, R. Landis, E. Wells, C. Woods, B. Zellner, and M. Gaffey using the Hubble Space Telescope . It has been designated S/2001 (107) 1 but has not yet received an official name.
Later observations in September 2005 with the VLT allowed the determination of an orbit . Apart from data in infobox, the inclination was found to be 3 ± 1° with respect to an axis pointing towards (β, λ) = (+55°, 75°) . Given the ~10° uncertainty in the actual rotational axis of Camilla, one can say that the orbit's inclination is less than 10°.
The satellite is estimated to measure about 11 km in diameter . Assuming a similar density to the primary, this would give it an approximate mass of ~1.5 × 1015 kg. It has a similar colour to the primary .
* Data on (87) Sylvia from Johnston's archive (maintained by W. R. Johnston)
1. ^ a b c J. Torppa et al. (2003). "Shapes and rotational properties of thirty asteroids from photometric data" (PDF). Icarus 164: 346. doi:10.1016/S0019-1035(03)00146-5. http://www.rni.helsinki.fi/~mjk/thirty.pdf.