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433 Eros

From Academic Kids

433 Eros
Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)
Discoverer Carl Gustav Witt
Discovery date August 13, 1898
Alternate
designations
1898 DQ; 1956 PC B (http://cfa-www.harvard.edu/iau/MPDes.html)
Category Near-Earth,
Mars-crosser asteroid
Orbital elements C (http://asteroid.lowell.edu/)
Epoch October 22, 2004 (JD 2453300.5)
Eccentricity (e) 0.223
Semi-major axis (a) 218.155 Gm (1.458 AU)
Perihelion (q) 169.548 Gm (1.133 AU)
Aphelion (Q) 266.762 Gm (1.783 AU)
Orbital period (P) 643.219 d (1.76 a)
Mean orbital speed 24.36 km/s
Inclination (i) 10.829
Longitude of the
ascending node
(Ω)
304.401
Argument of
perihelion
(ω)
178.664
Mean anomaly (M) 320.215
Physical characteristics
Dimensions 13×13×33 km
Mass 7.21015 kg
Density 2.4 g/cm
Surface gravity 0.0059 m/s
Escape velocity 0.0103 km/s
Rotation period 0.2194 d (5 h 16 min)
Spectral class S
Absolute magnitude 11.16
Albedo 0.16
Mean surface
temperature
~227 K

The asteroid 433 Eros was named after the Greek god of love Eros. It is an S-type asteroid approximately 13 × 13 × 33 km in size, the second-largest near-Earth asteroid. It is also a Mars-crosser asteroid.

This picture of Eros shows the view looking from one end of the asteroid across the gouge on its underside and toward the opposite end.
Enlarge
This picture of Eros shows the view looking from one end of the asteroid across the gouge on its underside and toward the opposite end.

It was visited by the NEAR Shoemaker probe, which first orbited it taking extensive photographs of its surface and then on February 12th 2001 at the end of its mission was landed on the asteroid's surface using only its maneuvering jets.

Surface gravity depends on the distance from a spot on the surface to the center of a body's mass. The surface gravity on Eros varies a lot, since it is not a sphere but an elongated peanut-shaped (or potato- or shoe-shaped) object. The daytime temperature on Eros hovers at about 100 °C and nighttime measurements at −150 °C. Eros's density is 2,400 kg/m3, about the same as the density of Earth's crust. It rotates once every 5.27 hours.

NEAR scientists have found that most of the larger rocks strewn across Eros were ejected from a single crater in a meteorite collision perhaps 1 Ga (1 billion years) ago.

Eros is claimed as property by Gregory W. Nemitz of OrbDev. According to the Homestead principle, he wishes to charge NASA a parking and storage fee of 20 cents per year for the presence of NEAR Shoemaker on the asteroid. He is currently engaged in litigation to get his claim validated by the courts.

See also: List of geological features on 433 Eros

External links


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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. For pronunciation, see: Pronunciation of asteroid names.)
da:433 Eros (1898 DQ)

de:Eros (Asteroid) es:(433) Eros fr:433 ros it:433 Eros la:433 Eros ja:エロス (小惑星) nl:433 Eros pl:Eros (planetoida) sk:433 Eros

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