Astronomy:97 Klotho
.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 | |
| (97) Klotho | |
| Pronunciation | /ˈkloʊθoʊ/[1] |
| Named after | Clotho |
| Minor planet category | Main belt |
| Adjectives | Klothoian /kloʊˈθoʊ.iən/ |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 145.72 yr (53224 d) |
| |{{{apsis}}}|helion}} | 3.3534 astronomical unit|AU (501.66 Gm) |
| |{{{apsis}}}|helion}} | 1.99073 AU (297.809 Gm) |
| 2.67206 AU (399.734 Gm) | |
| Eccentricity | 0.25498 |
| Orbital period | 4.37 yr (1595.4 d) |
| Average Orbital speed | 17.93 km/s |
| Mean anomaly | 85.0170° |
| Mean motion | 0° 13m 32.336s / day |
| Inclination | 11.783° |
| Longitude of ascending node | 159.705° |
| 268.687° | |
| Physical characteristics | |
| Dimensions | 82.83±4.5 km[2] 84.79 ± 3.13 km[3] |
| Mass | (1.33 ± 0.13) × 1018 kg[3] |
| Mean density | 4.16 ± 0.62 g/cm3[3] |
| Rotation period | 35.15 h (1.465 d)[2] 10.927 h[4] |
| Geometric albedo | 0.2285±0.027[2] 0.229 [5] |
| M (Tholen) X (Bus) Xc (DeMeo et al)[6] | |
| Absolute magnitude (H) | 7.63 |
Klotho (minor planet designation: 97 Klotho) 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.[7]
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.[4]
References
- ↑ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
- ↑ 2.0 2.1 2.2 2.3 Yeomans, Donald K., "97 Klotho", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=97, retrieved 12 May 2016.
- ↑ 3.0 3.1 3.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 4.0 4.1 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.
- ↑ Asteroid Data Sets
- ↑ DeMeo, Francesca E. et al. (2011), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus 202 (1): 160–180, doi:10.1016/j.icarus.2009.02.005, Bibcode: 2009Icar..202..160D, http://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016%252Fj.icarus.2009.02.005.pdf, retrieved 22 March 2013. See appendix A.
- ↑ Ostro, S. J. et al. (August 1985), "Mainbelt asteroids - Dual-polarization radar observations", Science 229 (4712): pp. 442–446, doi:10.1126/science.229.4712.442, PMID 17738665, Bibcode: 1985Sci...229..442O.
External links
- 97 Klotho at AstDyS-2, Asteroids—Dynamic Site
- 97 Klotho at the JPL Small-Body Database
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