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 17 February 1868
Designations
Named after
Clotho
 
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 145.72 yr (53224 d)
Aphelion 3.3534 AU (501.66 Gm)
Perihelion 1.99073 AU (297.809 Gm)
2.67206 AU (399.734 Gm)
Eccentricity 0.25498
4.37 yr (1595.4 d)
17.93 km/s
85.0170°
0° 13m 32.336s / day
Inclination 11.783°
159.705°
268.687°
Earth MOID 1.04357 AU (156.116 Gm)
Jupiter MOID 2.12642 AU (318.108 Gm)
Jupiter Tisserand parameter 3.304
Physical characteristics
Dimensions 82.83±4.5 km[1]
84.79 ± 3.13 km[2]
Mass (1.33 ± 0.13) × 1018 kg[2]
Mean density
4.16 ± 0.62 g/cm3[2]
Equatorial surface gravity
0.0231 m/s²
Equatorial escape velocity
0.0438 km/s
35.15 h (1.465 d)[1]
10.927 h[3]
0.2285±0.027[1]
0.229 [4]
Temperature ~170 K
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. ^ a b c d Yeomans, Donald K., "97 Klotho", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336free to read, 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), pp. 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" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 22 March 2013.  See appendix A.
  6. ^ Ostro, S. J.; et al. (August 1985), "Mainbelt asteroids - Dual-polarization radar observations", Science, 229 (4712), pp. 442–446, Bibcode:1985Sci...229..442O, doi:10.1126/science.229.4712.442, PMID 17738665. 

External links[edit]