538 Friederike

From Wikipedia, the free encyclopedia
Jump to: navigation, search
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)
16.64 km/s
293.642°
Inclination 6.503°
141.364°
228.385°
Physical characteristics
Dimensions 72 km[1]
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 [2]
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[edit]

  1. ^ 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. 
  1. PDS lightcurve data
  2. G. A. Krasinsky et al. Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
  3. 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).