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Encyclopedia > 132 Aethra


132 Aethra
Discovery
Discoverer James C. Watson
Discovery Date June 13, 1873
Alternate Designations A922 XB; 1949 MD; 1953 LF
Category Mars-crosser asteroid
Orbital Elements
Epoch July 14, 2004 (JD 2453200.5)
Eccentricity (e) 0.389
Semi-Major Axis (a) 390.199 Gm (2.608 AU)
Perihelion (q) 238.558 Gm (1.595 AU)
Aphelion (Q) 541.841 Gm (3.622 AU)
Orbital Period (P) 1538.652 d (4.21 a)
Mean Orbital Speed 18.44 km/s
Inclination (i) 25.055°
Longitude of the
Ascending Node (Ω)		 258.946°
Argument of Perihelion (ω) 254.330°
Mean Anomaly (M) 89.813°
Physical Characteristics
Dimensions 42.7 km
Mass 8.2×1016 kg
Density 2 ? g/cm³
Surface Gravity 0.012 m/s²
Escape Velocity 0.023 km/s
Rotation Period 0.2153 d 1 (http://www.psi.edu/pds/archive/lc.html)
Spectral Class M-type asteroid?
Absolute Magnitude 9.38
Albedo 0.172 2 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html)
Mean Surface Temperature ~232 K

Discovered by James Craig Watson in 1873, 132 Aethra is a light-coloured metallic main belt asteroid. It has a rather eccentric orbit that sometimes brings it closer to the Sun than the planet Mars. It was the first such Mars-crosser asteroid to be identified.


The varying light curve of the asteroid implies an elongated or irregular shape for its body.


It is named after Aethra, the mother of Theseus in Greek mythology.

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The Minor Planets
Vulcanoids | Main belt | Groups and Families | Near-Earth objects | Jupiter Trojans
Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper Belt | Oort Cloud
(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids)


This article is a stub. You can help Wikipedia by expanding it (http://en.wikipedia.org/w/index.php?title=132_Aethra&action=edit).



  Results from FactBites:
 
Greek Mythology: THEA THEIA Titan Goddess of Sight, Light, Blue Skies ( Euryphaessa Aithra Aethra ) (665 words)
THEIA was the Titan goddess of sight (thea) and shining light of the clear blue sky (aithre).
Theia was married to Hyperion, the Titan-god of light, and bore him three bright children Helios (the Sun), Eos (the Dawn), and Selene (the Moon).
Theia was the goddess of sight (thea) and shining light of the clear blue sky (aithre).
  More results at FactBites »


 
 

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