25 Phocaea
From Infogalactic: the planetary knowledge core
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A three-dimensional model of 25 Phocaea based on its light curve.
|
|
| Discovery | |
|---|---|
| Discovered by | J. Chacornac |
| Discovery date | April 6, 1853 |
| Designations | |
| Pronunciation | /foʊˈsiːə/ foh-SEE-ə |
|
Named after
|
Phōcæa |
| 1956 GC | |
| Main belt (Phocaea family) | |
| Orbital characteristics | |
| Epoch June 14, 2006 (JD 2453900.5) | |
| Aphelion | 450.716 Gm (3.013 AU) |
| Perihelion | 267.314 Gm (1.787 AU) |
| 359.015 Gm (2.400 AU) | |
| Eccentricity | 0.255 |
| 1357.936 d (3.72 a) | |
|
Average orbital speed
|
18.91 km/s |
| 6.932° | |
| Inclination | 21.584° |
| 214.258° | |
| 90.154° | |
| Physical characteristics | |
| Dimensions | 75.1 ± 3.6 km (IRAS)[1] 80.19 ± 4.66[2] km |
| Mass | (5.99 ± 0.60) × 1017[2] kg |
|
Mean density
|
2.21 ± 0.44[2] g/cm3 |
| 0.0210? m/s² | |
| 0.0397? km/s | |
| 0.4144 d (9.945 h)[1][3] | |
| Albedo | 0.231[1][4] |
| Temperature | ~173 K |
|
Spectral type
|
S[1] |
| 7.83[1] | |
25 Phocaea is a main-belt asteroid. It was discovered by J. Chacornac at Marseille, on April 6. 1853. It was his first asteroid discovery out of a total of six. It is named after Phocaea, the Greek name of Foça in Turkey, whence the founders of Marseille came.
Phocaea has been studied by radar.[5] Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico during 2010 gave a light curve with a period of 9.9341 ± 0.0002 hours. The brightness near the deepest minimum of the light curve showed changes with phase angle, which is the result of shadows extending across surface irregularities.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
- ↑ http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_DERIVED_LIGHTCURVE_V8_0/data/lc.tab
- ↑ http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_ALBEDOS_V1_1/data/albedos.tab
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
