Recent optical sightings have found a moon (see below). Using its orbit, Elektra's mass can be found more correctly. The value of 1.3×1019 kg indicates an unusually high density (for asteroids) of 3.8 ± 0.3 g/cm³. Optical sightings have also determined that Elektra's shape is quite non-spherical, as well as giving indications of albedo differences of 5-15% on its surface.
Moon (S/2003 (130) 1)[change | change source]
References[change | change source]
- D.P. Cruikshank and R.H. Brown (1987). "Organic Matter on Asteroid 130 Elektra". Science 238: 183. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1987Sci...238..183C&db_key=AST&data_type=HTML&format=&high=444b66a47d14088.
- F. Marchis (2006). "Shape, size and multiplicity of main-belt asteroids I. Keck Adaptive Optics survey". Icarus 185 (1): 39–63. doi:10.1016/j.icarus.2006.06.001. PMC 2600456. PMID 19081813.
- 130 Elektra and S/2003 (130) 1, orbit data website maintained by F. Marchis. Archived 16 January 2010 at WebCite
- IAUC 8183[dead link]
- Assuming a similar density to the primary.
- Discovery Circumstances: Numbered Minor Planets, Minor Planet Centre Archived 20 June 2007 at WebCite
- ASTORB orbital elements database, Lowell Observatory
- Based in IRAS mean diameter of 182±12 km, a/b ratio of 1.4 as per the following references
- Supplemental IRAS Minor Planet Survey Archived 17 January 2010 at WebCite
- PDS node spin vector database (in particular, the synthetic compiled value of a/b=1.4). Archived 17 January 2010 at WebCite
- (130) Elektra and S/2003 (130) 1, at Johnston's archive (maintained by W. R. Johnston). Archived 26 May 2011 at WebCite
- 130 Elektra and S/2003 (130) 1, F. Marchis Archived 16 January 2010 at WebCite
- Error estimate derived from consideration of and given errors in a and P. See propagation of uncertainty.
- On the extremities of the long axis.
- Supplemental IRAS minor planet survey Archived 17 January 2010 at WebCite
- PDS node taxonomy database Archived 16 January 2010 at WebCite