Minorplanet: | yes |
Background: |
|
157 Dejanira | |
Discovery Ref: | [1] |
Discovered: | 1 December 1875 |
Mpc Name: | (157) Dejanira |
Alt Names: | A875 XA; 1904 VB; |
Pronounced: | [2] |
Orbit Ref: | [3] |
Epoch: | 31 July 2016 (JD 2457600.5) |
Semimajor: | 2.58161AU |
Perihelion: | 2.07801AU |
Aphelion: | 3.0852abbr=onNaNabbr=on |
Eccentricity: | 0.19507 |
Period: | 4.15 yr (1515.1 d) |
Inclination: | 12.160° |
Asc Node: | 62.070° |
Avg Speed: | 18.36 km/s |
Dimensions: | 19.1 km |
Mass: | 7.3 kg |
Density: | 2.0 g/cm3 |
Surface Grav: | 0.0053 m/s² |
Escape Velocity: | 0.0101 km/s |
Abs Magnitude: | 11.2 |
Albedo: | 0.10 |
Arg Peri: | 46.282° |
Mean Motion: | / day |
Observation Arc: | 111.13 yr (40590 d) |
Uncertainty: | 0 |
Rotation: | 15.825abbr=onNaNabbr=on |
Moid: | 1.11241AU |
Jupiter Moid: | 2.16656AU |
Tisserand: | 3.366 |
157 Dejanira is a main belt asteroid that was discovered by Alphonse Borrelly on 1 December 1875, and named after the warlike princess Deianira in Greek mythology (Δηιάνειρα in Greek). The Dejanira family of asteroids is named after it.
Photometric observations of this asteroid were made in early 2009 at the Organ Mesa Observatory in Las Cruces, New Mexico. The resulting light curve shows a synodic rotation period of 15.825 ± 0.001 hours.