538 Friederike
| Discovery | |
|---|---|
| Discovered by | Paul Götz |
| Discovery date | July 18, 1904 |
| Designations | |
| 1904 OK | |
| Main belt (Hygiea family) | |
| Orbital characteristics | |
| Epoch 18 August 2005 (JD 2453600.5) | |
| Aphelion | 550.5 Gm (3.680 AU) |
| Perihelion | 396.0 Gm (2.647 AU) |
| 473.3 Gm (3.164 AU) | |
| Eccentricity | 0.163 |
| 2055 d (5.63 a) | |
Average orbital speed | 16.64 km/s |
| 293.642° | |
| Inclination | 6.503° |
| 141.364° | |
| 228.385° | |
| Physical characteristics | |
| Dimensions | 72 km |
| Mass | ~2.8×1017 kg (estimate) |
Mean density | ~1.4 g/cm³ (estimate)[3] |
| ~0.014 m/s² (estimate) | |
| ~0.032 km/s (estimate) | |
| 1.1 d | |
| Albedo | 0.0641 [1] |
| Temperature |
~158 K max: 244K (-29° C) |
Spectral type | B-type asteroid[4] |
| 9.30 | |
|
| |
538 Friederike is a minor planet orbiting the Sun.
References
- PDS lightcurve data
- G. A. Krasinsky et al. Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
- T. Mothé-Diniz et al. Rotationally Resolved Spectra of 10 Hygiea and a Spectroscopic Study of the Hygiea Family, Icarus, Vol. 152, p. 117 (2001).
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