42 Isis

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42 Isis
Discovery
Discovered by Norman Robert Pogson
Discovery date May 23, 1856
Designations
Alternative names  
Minor planet
category		 Main belt
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 446.706 Gm (2.986 AU)
Perihelion 283.890 Gm (1.898 AU)
Semi-major axis 365.298 Gm (2.442 AU)
Eccentricity 0.223
Orbital period 1393.737 d (3.82 a)
Average orbital speed 18.82 km/s
Mean anomaly 121.874°
Inclination 8.530°
Longitude of ascending node 84.398°
Argument of perihelion 236.626°
Physical characteristics
Dimensions 100.2 km
Mass 1.1×1018 kg
Mean density ? g/cm³
Equatorial surface gravity 0.0280 m/s²
Escape velocity 0.0530 km/s
Rotation period ? d
Albedo 0.171 (geometric)[1]
Temperature ~178 K
Spectral type S
Apparent magnitude 9.18 (brightest)
Absolute magnitude 7.53

42 Isis (IPA: /ˈaɪsɨs/) is a large main belt asteroid. Isis was discovered by N. R. Pogson on May 23, 1856. It was his first asteroid discovery. It is named after Isis, the classical (Greek) name of an Egyptian goddess.

[edit] References

  1. ^ Asteroid Data Sets


[edit] External links


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