|Discovered by||A. Marth|
|Discovery date||March 1, 1854|
|Other names||A899 NG|
|Reference date June 14, 2006 (JD 2453900.5)|
|Longest distance from the Sun||409.809 Gm (2.739 AU)|
|Shortest distance from the Sun||354.398 Gm (2.369 AU)|
|Longest distance from the center of its orbital path
|382.103 Gm (2.554 AU)|
|How long it takes to complete an orbit||1491.013 d (4.08 a)|
|Average speed||18.61 km/s|
|Angle above the reference plane
|Size and other qualities|
|Average density||2.0 g/cm³|
|Surface gravity||0.0593 m/s²|
|Escape velocity||0.1122 km/s|
|Rotation period||0.2246 d (5.390 h) |
|How much light it reflects||0.1793 (geometric) |
|Avg. surface temp.||~170 K|
|8.58 to 11.38|
It is probably not a fully solid body, since its density is too low for a solid silicate object and much lower than Eunomia or Juno. Its orbit is less eccentric and inclined than those of its bigger cousins - being indeed the most circular of any asteroid found up to that point - and as a consequence it never becomes as bright as Iris or Hebe, especially as it is much farther from the Sun than those asteroids. It can reach magnitudes of around +8.6 at a favorable opposition, but more usually is around the binocular limit of +9.5.
References[change | change source]
- PSI.edu - Albedos
- Tedesco, E. F. (March 1979). "Binary Asteroids: Evidence for Their Existence from Lightcurves". Science, New Series 203 (4383): 905-907. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1979Sci...203..905T&db_key=AST&data_type=HTML&format=&high=42c888df4628097.
- van Flandern, T. C.; Tedesco, E. F.; Binzel, R. P. (1979). "Satellites of asteroids". Asteroids : 443-465Tucson, AZ: University of Arizona Press.