| Minorplanet: | yes |
| Background: |
|
| 82 Alkmene | |
| Discovered: | 27 November 1864 |
| Mpc Name: | (82) Alkmene |
| Pronounced: | [1] |
| Adjective: | Alkmenean [2] |
| Epoch: | 9 December 2014 (JD 2457000.5) |
| Semimajor: | 2.7655 AU |
| Perihelion: | 2.1609 AU |
| Eccentricity: | 0.2186 |
| Inclination: | 2.8286° |
| Asc Node: | 25.507° |
| Arg Peri: | 111.27° |
| Mean Anomaly: | 192.56° |
| Avg Speed: | 17.70 km/s |
| Dimensions: | (IRAS) |
| Mass: | (assumed) |
| Rotation: | 12.999 h |
| Abs Magnitude: | 8.40 |
| Albedo: | 0.208 |
82 Alkmene is a main-belt asteroid. Alkmene was discovered by R. Luther on 7 November 1864 and named after Alcmene, the mother of Herakles in Greek mythology. Based on IRAS data, Alkmene is estimated to be about 61km (38miles) in diameter. A satellite has been suggested based on 1985 lightcurve data.[3]
Asteroid Alkmene occulted the apparent magnitude 7.5 star HIP 99229 in the constellation of Capricornus on 18 September 2014 around 06:41 UT (17 September 23:41 PDT) and was centered on Sacramento, CA.[4] [5] Alkmene projected an eclipse shadow that moves at about 2order=flipNaNorder=flip. Asteroid occultations allow for accurate 2-dimensional mapping of an asteroids silhouette when observed by multiple telescopes separated by about 10 km (6.2 mi).