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 | 3.680 AU |
| Perihelion | 2.647 AU |
| 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.
Photometric observations at the Organ Mesa Observatory in New Mexico during 2012 showed a rotation period of 46.728 ± 0.004 hours with a brightness variation of 0.25 ± 0.02 in magnitude.[1]
References
- ↑ Pilcher, Frederick (April 2013), "Rotation Period Determinations for 24 Themis, 159 Aemilia 191 Kolga, 217 Eudora, 226 Weringia, 231 Vindobona, and 538 Friederike", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 40 (2): 85–87, Bibcode:2013MPBu...40...85P.
- 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).
External links
| ||||||
| ||||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Thursday, January 28, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.