97 Klotho

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97 Klotho
97Klotho (Lightcurve Inversion).png
A three-dimensional model of 97 Klotho based on its light curve.
Discovery
Discovered by Ernst Wilhelm Tempel
Discovery date February 17, 1868
Designations
Named after
Clotho
 
Minor planet category Main belt
Orbital characteristics[1]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 501.752 Gm (3.354 AU)
Perihelion 296.593 Gm (1.983 AU)
399.173 Gm (2.668 AU)
Eccentricity 0.257
1592.030 d (4.36 a)
17.93 km/s
14.314°
Inclination 11.783°
159.776°
268.671°
Physical characteristics
Dimensions 84.79 ± 3.13[2] km
Mass (1.33 ± 0.13) × 1018[2] kg
Mean density
4.16 ± 0.62[2] g/cm3
0.0231 m/s²
0.0438 km/s
10.927[3] h
Albedo 0.229 [4]
Temperature ~170 K
Spectral type
M (Tholen)
X (Bus)
Xc (DeMeo et al)[5]
7.63

97 Klotho (/ˈklθ/ KLOH-thoh) is a fairly large main-belt asteroid. While it is an M-type, its radar albedo is too low to allow a nickel-iron composition. Klotho is similar to 21 Lutetia and 22 Kalliope in that all three are M-types of unknown composition. Klotho was found by Ernst Tempel on February 17, 1868. It was his fifth and final asteroid discovery. It is named after Klotho or Clotho, one of the three Moirai, or Fates, in Greek mythology.

13-cm radar observations of this asteroid from the Arecibo Observatory between 1980 and 1985 were used to produce a diameter estimate of 108 km.[6]

In 1990, the asteroid was observed for four nights from the Collurania-Teramo Observatory in Italy, producing an asymmetric light curve that showed a rotation period of 10.927 ± 0.001 hours and a brightness variation of 0.17 ± 0.02 in magnitude. This period confirms a value independently determined in 1971.[3]

References[edit]

  1. ^ Yeomans, Donald K., "97 Klotho", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ a b Dotto, E. et al. (June 1992), "M-type asteroids - Rotational properties of 16 objects", Astronomy and Astrophysics Supplement Series 95 (2): 195–211, Bibcode:1992A&AS...95..195D. 
  4. ^ Asteroid Data Sets
  5. ^ DeMeo, Francesca E. et al. (2011), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-03-33.  See appendix A.
  6. ^ Ostro, S. J. et al. (August 1985), "Mainbelt asteroids - Dual-polarization radar observations", Science 229: 442–446, Bibcode:1985Sci...229..442O, doi:10.1126/science.229.4712.442.