283 Emma

Tags: Planet.

283 Emma is a large main-belt asteroid. It was discovered by Auguste Charlois on February 8 1889 in Nice France. The reason for its name is unknown.Measurements made with the IRAS observatory give a diameter of 145.70 ± 5.89 km and a geometric albedo of 0.03 ± 0.01. By comparison the MIPS photometer on the Spitzer Space Telescope gives a diameter of 145.44 ± 7.72 km and a geometric albedo of 0.03 ± 0.01.

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apoapsis (km)

5.24763e+11

average speed (km/s)

61452.0

mass (kg)

1300.0

orbital period (μ)

1.67512e+08

periapsis (km)

3.85674e+11

absolute magnitude

8.72

albedo

0.0262

discovery date

1889-02-08

discoverer

Auguste Charlois

epoch

30 January 2005 (JD 2453400.5)

rotation period (s)

24796.8