Discovery
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Discovered by | Johann Palisa |
Discovery date | May 19, 1881 |
Designations
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Named after | Princess Stéphanie |
Alternate name(s) | 1925 VE, 1931 FP, 1932 UA, 1943 WB, 1946 MA, 1950 TT4, 1961 WB |
Minor planet category |
Main belt |
Epoch 30 January 2005 (JD 2453400.5) | |
Aphelion | 442.081 Gm (2.955 AU) |
Perihelion | 260.473 Gm (1.741 AU) |
Semi-major axis | 351.277 Gm (2.348 AU) |
Eccentricity | 0.258 |
Orbital period | 1314.246 d (3.6 a) |
Average orbital speed | 19.44 km/s |
Mean anomaly | 59.033° |
Inclination | 7.585° |
Longitude of ascending node | 258.057° |
Argument of perihelion | 78.595° |
Physical characteristics
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Dimensions | 31.0 km |
Mass | unknown |
Mean density | unknown |
Equatorial surface gravity | unknown |
Escape velocity | unknown |
Rotation period | 18.198 h |
Albedo | 0.073 |
Temperature | unknown |
Spectral type | P |
Absolute magnitude (H) | 11.0 |
220 Stephania is a Main belt asteroid. It is a P-type asteroid, meaning it is relatively dark and composed of organic rich silicates, carbon and anhydrous silicates.
It was discovered by Johann Palisa on May 19, 1881 in Vienna. It was the first discovery he made after transferring to the observatory from Pola.[1]
The name honours Crown Princess Stéphanie, wife of the heir-apparent Crown Prince Rudolf of Austria. The couple was married the year the asteroid was discovered. It was the first time that a naming commemorated a wedding and was given as a wedding gift.[1]
Lightcurve data has also been recorded by observers at the Antelope Hill Observatory, which has been designated as an official observatory by the Minor Planet Center.[2]
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