538 Friederike

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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)
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[edit]

  1. ^ a b c d "538 Friederike (1904 OK)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 8 May 2016. 
  2. ^ a b "Supplemental IRAS Minor Planet Survey". Archived from the original on 2007-03-11. 
  3. ^ G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158: 98. doi:10.1006/icar.2002.6837. 
  4. ^ "PDS lightcurve data". 
  5. ^ T. Mothé-Diniz; et al. (2001). "Rotationally Resolved Spectra of 10 Hygiea and a Spectroscopic Study of the Hygiea Family". Icarus. 152: 117. 
  6. ^ 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[edit]