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[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 (/ˈpænəˈpiːə/ PAN-ə-PEE-ə) 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) to the asteroid, and on June 2, 2095 when it will come only 0.003372 AU (1.31 LD) to the asteroid.[2]
References
- 1 2 "Discovery Circumstances: Numbered Minor Planets (1)-(5000)". IAU: Minor Planet Center. Archived from the original on 2 February 2009. Retrieved 31 December 2008.
- 1 2 "70 Panopaea". JPL Small-Body Database. Jet Propulsion Laboratory. Retrieved 31 December 2008.
- ↑ "(70) Panopaea". AstDyS. Italy: University of Pisa. Retrieved 31 December 2008.
- 1 2 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.
- 1 2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ↑ 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.
- ↑ 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.
- ↑ 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.
- ↑ Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 22. ISBN 3-540-00238-3. Retrieved 31 December 2008.
- ↑ 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.
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