39 Laetitia

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39 Laetitia
Discovery
Discovered by J. Chacornac
Discovery date February 8, 1856
Designations
Alternative names none
Minor planet
category		 Main belt
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 461.503 Gm (3.085 AU)
Perihelion 366.877 Gm (2.452 AU)
Semi-major axis 414.190 Gm (2.769 AU)
Eccentricity 0.114
Orbital period 1682.713 d (4.61 a)
Average orbital speed 17.84 km/s
Mean anomaly 58.261°
Inclination 10.383°
Longitude of ascending node 157.168°
Argument of perihelion 209.560°
Physical characteristics
Dimensions 149.5 km
Mass ~3.5×1018 kg
Mean density 2.0? g/cm³
Equatorial surface gravity ~0.0418 m/s²
Escape velocity ~0.0790 km/s
Rotation period 0.2141 d (5.138 h) [1]
Albedo 0.287 (geometric) [2]
Temperature ~158 K
Spectral type S
Apparent magnitude 8.86 to 12.07
Absolute magnitude 6.1
Angular diameter 0.142" to 0.051"

39 Laetitia (IPA: /lɨˈtiːʃiə/) is a large, bright main belt asteroid.

It was discovered by J. Chacornac on February 8, 1856 and named after Laetitia, a minor Roman goddess of gaiety.

[edit] References

  1. ^ [1][dead link]
  2. ^ [2][dead link]

[edit] External links

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