201 Penelope
Discovery | |
---|---|
Discovered by | Johann Palisa |
Discovery date | 7 August 1879 |
Designations | |
(201) Penelope | |
Pronunciation | /pɪˈnɛləpiː/[1] |
Named after | Penelópē |
A879 PA; 1869 GA | |
Main belt | |
Adjectives | Penelopean /pɪˈnɛloʊˈpiːən/[1] |
Orbital characteristics[2] | |
Epoch 21 January 2022 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 142.58 yr (52,077 d)[3] |
Aphelion | 3.160 |
Perihelion | 2.199 |
2.680 | |
Eccentricity | 0.17924[4][3] |
4.39 yr (1,602.14 d)[3] | |
Average orbital speed | 18.19 km/s |
169.01173°[4] | |
0° 13m 28.917s / day[4] | |
Inclination | 5.75625°[4][3] |
156.91554°[4] | |
180.90559°[4] | |
Jupiter MOID | 2.23013 |
TJupiter | 3.347[3] |
Physical characteristics | |
Dimensions | 68.39±3.5 km[2] 87.72 km[5] |
3.7474 h (0.15614 d)[3] | |
0.1604±0.018[2] 0.0881±0.0187[5] | |
Penelope (minor planet designation: 201 Penelope) is a large main belt asteroid that was discovered by Austrian astronomer Johann Palisa on August 7, 1879, in Pola. The asteroid is named after Penelope, the wife of Odysseus in Homer's The Odyssey. It is orbiting the Sun at a distance of 2.68
Based upon the spectra of this object, it is classified as a M-type asteroid, indicating it may be metallic in composition.[5] It may be the remnant of the core of a larger, differentiated asteroid. Near infrared absorption features indicate the presence of variable amounts of low-iron, low-calcium orthopyroxenes on the surface. Trace amounts of water is detected with a mass fraction of about 0.13–0.15 wt%.[6] It has an estimated size of around 88 km.[5] With a rotation period of 3.74 hours, it is the fastest rotating asteroid larger than 50 km in diameter.[2]
References
- ^ a b "Penelope". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ a b c d e f "JPL Small-Body Database Search Engine: diameter > 50 (km) and rot_per > 0 (h)". JPL Solar System Dynamics. Retrieved 12 May 2016.
- ^ a b c d e f g h i j k l m n "Small-Body Database Lookup". ssd.jpl.nasa.gov. Retrieved 12 April 2022.
- ^ a b c d e f g h i "I
AU Minor Planet Center". minorplanetcenter.net. Retrieved 12 April 2022. - ^ a b c d e f Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667, Bibcode:2012LPICo1667.6089P. See Table 4.
- ^ Hardersen, Paul S.; Gaffey, Michael J.; Abell, Paul A. (January 1983), "Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids", Icarus, vol. 175, no. 1, pp. 141–158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017.
External links
- The Asteroid Orbital Elements Database
- Asteroid Lightcurve Parameters
- Asteroid Albedo Compilation
- 201 Penelope at AstDyS-2, Asteroids—Dynamic Site
- 201 Penelope at the JPL Small-Body Database
- Articles with short description
- Short description matches Wikidata
- Use dmy dates from October 2019
- Minor planet object articles (numbered)
- Articles with JPL SBDB identifiers
- Articles with MPC identifiers
- Background asteroids
- Discoveries by Johann Palisa
- Named minor planets
- M-type asteroids (Tholen)
- X-type asteroids (SMASS)
- Astronomical objects discovered in 1879