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Discovery
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| Discovered by | Karl Theodor Robert Luther |
| Discovery date | April 4, 1858 |
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Designations
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| Named after | Calypso |
| Alternate name(s) | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 471.807 Gm (3.154 AU) |
| Perihelion | 311.998 Gm (2.086 AU) |
| Semi-major axis | 391.903 Gm (2.620 AU) |
| Eccentricity | 0.204 |
| Orbital period | 1548.736 d (4.24 a) |
| Average orbital speed | 18.21 km/s |
| Mean anomaly | 98.113° |
| Inclination | 5.153° |
| Longitude of ascending node | 143.813° |
| Argument of perihelion | 312.330° |
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Physical characteristics
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| Dimensions | 115.4 km |
| Mass | 1.6×1018 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0323 m/s² |
| Escape velocity | 0.0610 km/s |
| Rotation period | ? d |
| Albedo | 0.040 [1] |
| Temperature | ~172 K |
| Spectral type | ? |
| Absolute magnitude (H) | 8.81 |
53 Kalypso ( /kəˈlɪpsoʊ/) is a large and very dark main belt asteroid. It was discovered by Robert Luther on April 4, 1858 at Düsseldorf. It is named after Calypso, a sea nymph in Greek mythology, a name it shares with Calypso, a moon of Saturn.
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