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
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 kg[5]
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]

The asteroid frequently makes close approaches with 16 Psyche, such as on June 12, 2040 when it will make a close approach of 0.00602 AU (2.34 Lunar distances, or approx. 770,000 km, 478,455 mi) to the asteroid, and on June 2, 2095 when it will come only 0.003372 AU (1.31 LD) to the asteroid.[2]

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. ^ a b "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 17 January 2010. Retrieved 31 December 2008. 
  5. ^ a b 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.
  6. ^ Schroll & 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 17 January 2010. Retrieved 27 December 2008. 
  8. ^ Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on 17 June 2012. Retrieved 31 December 2008. 
  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), Svoren, J.; Pittich, E. M.; Rickman, H., eds., "Resonances and chaos in the asteroid belt", 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, pp. 297–308, Bibcode:1999esra.conf..297S. 

External links[edit]