70 Panopaea

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70 Panopaea
Discovery[1]
Discovered by Hermann Mayer Salomon Goldschmidt
Discovery site Paris Observatory
Discovery date 5 May 1861
Designations
MPC designation 70
Named after
Panopea
Minor planet category main belt[2]
Orbital characteristics[3]
Epoch 30 November 2008
Aphelion 3.0903 AU
Perihelion 2.1402 AU
2.61526 AU
Eccentricity 0.181641
1544.79 days (4.23 years)
264.193°
Inclination 11.584°
47.783°
256.016°
Physical characteristics
Dimensions 122.17 kilometres (75.91 mi) ± 2.3 kilometres (1.4 mi)
Mean diameter[4]
Mass (4.33 ± 1.09) × 1018[5] kg
Mean density
3.48 ± 1.05[5] g/cm3
15.87 ± 0.04 hours[6]
Albedo 0.0675 ± 0.003[4]
Spectral type
C[7]
8.11[8]

70 Panopaea (/ˈpænəˈpə/ PAN-ə-PEE) is a large main belt asteroid. Its orbit is close to those of the Eunomia asteroid family; however, Panopaea is a dark, primitive carbonaceous C-type asteroid in contrast to the S-type asteroids of the Eunomian asteroids.

Panopaea was discovered by Hermann Goldschmidt on 5 May 1861.[1] It was his fourteenth and last asteroid discovery. It is named after Panopea, a nymph in Greek mythology; the name was chosen by Robert Main, President of the Royal Astronomical Society.[9]

The orbit of 70 Panopaea places it in a mean motion resonance with the planets Jupiter and saturn. The computed Lyapunov time for this asteroid is 24,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets.[10]

References[edit]

  1. ^ a b "Discovery Circumstances: Numbered Minor Planets (1)-(5000)". IAU: Minor Planet Center. Archived from the original on 2 February 2009. Retrieved 31 December 2008. 
  2. ^ "70 Panopaea". JPL Small-Body Database. Jet Propulsion Laboratory. Retrieved 31 December 2008. 
  3. ^ "(70) Panopaea". AstDyS. Italy: University of Pisa. Retrieved 31 December 2008. 
  4. ^ a b Tedesco et al. (2004). "Supplemental IRAS Minor Planet Survey (SIMPS)". IRAS-A-FPA-3-RDR-IMPS-V6.0. Planetary Data System. Archived from the original on 21 January 2009. Retrieved 31 December 2008. [dead link]
  5. ^ a b 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.
  6. ^ Schroll and Schober (1983). "Lightcurves and rotation periods for the asteroids 70 Panopaea and 235 Carolina". Astronomy and Astrophysics Supplement Series 53: 77–79. Bibcode:1983A&AS...53...77S. 
  7. ^ Neese (2005). "Asteroid Taxonomy". EAR-A-5-DDR-TAXONOMY-V5.0. Planetary Data System. Archived from the original on 21 January 2009. Retrieved 27 December 2008. [dead link]
  8. ^ Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on 1 December 2008. Retrieved 31 December 2008. [dead link]
  9. ^ Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 22. ISBN 3-540-00238-3. Retrieved 31 December 2008. 
  10. ^ Šidlichovský, M. (1999), "Resonances and chaos in the asteroid belt", in Svoren, J.; Pittich, E. M.; Rickman, H., Evolution and source regions of asteroids and comets : proceedings of the 173rd colloquium of the International Astronomical Union, held in Tatranska Lomnica, Slovak Republic, August 24–28, 1998: 297–308, Bibcode:1999esra.conf..297S.