538 Friederike

Minor Planet | name=538 Friederike
discoverer=Paul Götz
discovery_date=July 18, 1904
designations=1904 OK
category=Main belt (Hygiea family)
epoch=18 August, 2005 (JD 2453600.5)
semimajor=473.3 Gm (3.164 AU)
perihelion=396.0 Gm (2.647 AU)
aphelion=550.5 Gm (3.680 AU)
eccentricity=0.163
period=2055 d (5.63 a)
inclination=6.503°
asc_node=141.364°
arg_peri=228.385°
mean_anomaly=293.642°
speed=16.64 km/s
dimensions=72 km ^{[http://www.psi.edu/pds/resource/imps.html]}
mass=~2.8×10¹⁷ kg "(estimate)"
density=~1.4 g/cm³ "(estimate)" ^{[#Krasinsky02| [3]}
gravity=~0.014 m/s² "(estimate)"
escape_velocity=~0.032 km/s "(estimate)"
rotation=1.1 d ^{[http://www.psi.edu/pds/resource/lc.html]}
spectral_class=B-type asteroid ^{[#MD01| [4]}
abs_mag=9.30
albedo=0.0641 ^{[#IRAS| [1]}
temperature=~158 K
"max:" 244K (-29° C)

538 Friederike is a minor planet orbiting the Sun.

References

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[http://www.psi.edu/pds/resource/imps.html Supplemental IRAS Minor Planet Survey]

# [http://www.psi.edu/pds/resource/lc.html PDS lightcurve data]
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G. A. Krasinsky et al "Hidden Mass in the Asteroid Belt", Icarus, Vol. 158, p. 98 (2002).

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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).