538 Friederike
| Discovery | |
|---|---|
| Discovered by | Paul Götz |
| Discovery date | 18 July 1904 |
| Designations | |
| 1904 OK | |
| Main belt (Hygiea family) | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.70 yr (40800 d) |
| Aphelion | 3.6924 AU (552.38 Gm) |
| Perihelion | 2.6238 AU (392.51 Gm) |
| 3.1581 AU (472.45 Gm) | |
| Eccentricity | 0.16919 |
| 5.61 yr (2049.9 d) | |
Average orbital speed | 16.64 km/s |
| 275.237° | |
| 0° 10m 32.232s / day | |
| Inclination | 6.5204° |
| 141.173° | |
| 227.779° | |
| Earth MOID | 1.62697 AU (243.391 Gm) |
| Jupiter MOID | 1.77775 AU (265.948 Gm) |
| Jupiter Tisserand parameter | 3.173 |
| Physical characteristics | |
Mean radius |
36.245±1.15 km [1] 36 km[2] |
| Mass | ~2.8×1017 kg (estimate) |
Mean density | ~1.4 g/cm³ (estimate)[3] |
Equatorial surface gravity | ~0.014 m/s² (estimate) |
Equatorial escape velocity | ~0.032 km/s (estimate) |
|
1.1 d [4] 46.728 h (1.9470 d) [1] | |
|
0.0641 [2] 0.0641±0.004 [1] | |
| Temperature |
~158 K max: 244K (-29° C) |
| B-type asteroid [5] | |
| 9.5 | |
|
| |
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.[6]
References
- 1 2 3 4 "538 Friederike (1904 OK)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 8 May 2016.
- 1 2 "Supplemental IRAS Minor Planet Survey". Archived from the original on 2007-03-11.
- ↑ G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158: 98. doi:10.1006/icar.2002.6837.
- ↑ "PDS lightcurve data".
- ↑ T. Mothé-Diniz; et al. (2001). "Rotationally Resolved Spectra of 10 Hygiea and a Spectroscopic Study of the Hygiea Family". Icarus. 152: 117.
- ↑ Pilcher, Frederick (April 2013), "Rotation Period Determinations for 24 Themis, 159 Aemilia 191 Kolga, 217 Eudora, 226 Weringia, 231 Vindobona, and 538 Friederike", The Minor Planet Bulletin, 40 (2): 85–87, Bibcode:2013MPBu...40...85P.
External links
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