11 Parthenope
 | |
| Discovery | |
|---|---|
| Discovered by | Annibale de Gasparis |
| Discovery site | Naples Obs. |
| Discovery date | 11 May 1850 |
| Designations | |
| MPC designation | (11) Parthenope |
| Pronunciation | /pɑːrˈθɛnəpiː/[1] |
Named after | Parthenopē |
| Main belt | |
| Adjectives | Parthenopean /ˌpɑːrθənəˈpiːən/, Parthenopian /pɑːrθəˈnoʊpiən/[2] |
| Orbital characteristics[3] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 60281 days (165.04 yr) |
| Aphelion | 2.69837 AU (403.670 Gm) |
| Perihelion | 2.20671 AU (330.119 Gm) |
| 2.45254 AU (366.895 Gm) | |
| Eccentricity | 0.10024 |
| 3.84 yr (1402.9 d) | |
Average orbital speed | 19.02 km/s |
| 330.520° | |
| 0° 15m 23.81s / day | |
| Inclination | 4.62985° |
| 125.567° | |
| 196.005° | |
| Earth MOID | 1.19227 AU (178.361 Gm) |
| Jupiter MOID | 2.54174 AU (380.239 Gm) |
| TJupiter | 3.483 |
| Physical characteristics | |
| Dimensions | c/a = 0.88±0.05[4] |
Mean diameter | 149±2 km[4] 153.3±3.1 km (IRAS)[3] |
Mean radius | 76.665 ± 1.55 km |
| Mass | (5.5±0.4)×1018 kg[4] 6.15×1018 kg[5] |
Mean density | 3.2±0.27 g/cm3[4] 3.28±0.20 g/cm3[5] |
Equatorial surface gravity | 0.0578 m/s2 |
Equatorial escape velocity | 0.0941 km/s |
| 13.7204 h (0.57168 d)[3] | |
| 0.187 (calculated)[4] 0.1803±0.007[3] | |
| Temperature | ~174 K |
| S-type asteroid[3] | |
| 8.68[6] to 12.16 | |
| 6.55[3] | |
| 0.178" to 0.057" | |
.svg){kind=small}
Parthenope[7] (minor planet designation: 11 Parthenope) is a large, bright main-belt asteroid.
Parthenope was discovered by Annibale de Gasparis on 11 May 1850. It is the second of his nine asteroid discoveries. It was named after Parthenopē, who was one of the Sirens in Greek mythology. Parthenopē founded the city of Naples.[8] Two symbols were proposed for Parthenope: a fish and a star (.svg){kind=small}
) and later a lyre (.svg){kind=small}
). Both are not used anymore.
On 6 August 2008, during a perihelic opposition, Parthenope had an apparent magnitude of 8.8.
In 1988, a UH88 telescope at the Mauna Kea Observatories looked for it, but they never found it.[9]
It has a rotation period of 13.722 ± 0.001 hours, Its brightness is anywhere from 0.10 ± 0.0s in magnitude.[10][3]
Mass
[change | change source]In 2007, Baer and Chesley discovered that it is of 6.3×1018 kg.[11] It had a density of 3.3 g/cm3.[11] In 2008, it was found that it could have a mass of 6.15×1018 instead.[5] In 1997 and 2001, it was thought that that it was 5×1018 kg and had a density 2.7 g/cm3.[11]
Related pages
[change | change source]Notes
[change | change source]- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ "Parthenopean". Oxford English Dictionary. Oxford University Press. 2nd ed. 1989., "Parthenopian". Oxford English Dictionary. Oxford University Press. 2nd ed. 1989.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "JPL Small-Body Database Browser: 11 Parthenope" (2008-08-04 last obs). Retrieved 8 April 2016.
- ↑ 4.0 4.1 4.2 4.3 4.4 P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
- ↑ 5.0 5.1 5.2 Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 8 July 2013. Retrieved 6 December 2008.
- ↑ "AstDys (11) Parthenope Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 26 June 2010.
- ↑ Stressed on the second syllable, /pɑːrˈθɛnəpiː/ par-THEN-ə-pee.
- ↑ De Gasparis, Annibale (May 1850). "The New Planet Parthenope". Monthly Notices of the Royal Astronomical Society. 10 (7): 144–147. doi:10.1093/mnras/10.7.144.
- ↑ Gradie, J.; Flynn, L. (March 1988), "A Search for Satellites and Dust Belts Around Asteroids: Negative Results", Abstracts of the Lunar and Planetary Science Conference, vol. 19, pp. 405–406, Bibcode:1988LPI....19..405G.
- ↑ Pilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana", The Minor Planet Bulletin, 38 (4): 183–185, Bibcode:2011MPBu...38..183P.
- ↑ 11.0 11.1 11.2 Baer, James; Steven R. Chesley (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris". Celestial Mechanics and Dynamical Astronomy. 100 (2008). Springer Science+Business Media B.V. 2007: 27–42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8.
Other websites
[change | change source]- Lightcurve plot of 11 Parthenope, Palmer Divide Observatory, B. D. Warner (2008)
- IOTA (International Occultation Timing Association) occultation database
- 2011-Jan-26 Occultation / (2011 Asteroidal Occultation Results for North America)
