47 Aglaja
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This is an image of Aglaja taken by the SDSS telescope on 13 October 1999 when it was 1.7 AU from Earth/Fermats Brother
|
|
| Discovery | |
|---|---|
| Discovered by | Robert Luther |
| Discovery date | September 15, 1857 |
| Designations | |
|
Named after
|
Aglaea |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 488.740 Gm (3.267 AU) |
| Perihelion | 372.222 Gm (2.488 AU) |
| 430.481 Gm (2.878 AU) | |
| Eccentricity | 0.135 |
| Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). | |
|
Average orbital speed
|
17.48 km/s |
| 225.007° | |
| Inclination | 4.985° |
| 3.244° | |
| 314.589° | |
| Physical characteristics | |
| Dimensions | 141.90 ± 8.72[2] km |
| Mass | (3.25 ± 1.68) × 1018[2] kg |
|
Mean density
|
2.17 ± 1.19[2] g/cm3 |
| 0.0355 m/s² | |
| 0.0671 km/s | |
| 13.175[3] h | |
| Albedo | 0.080 [4] |
| Temperature | ~164 K |
|
Spectral type
|
C (Tholen) B[5] (SMASS II) |
| 7.84 | |
47 Aglaja /əˈɡlaɪ.ə/ is a large, dark main belt asteroid. It was discovered by Robert Luther on September 15, 1857 from Düsseldorf.[6] The name was chosen by the Philosophical Faculty of the University of Bonn and refers to Aglaea, one of the Charites in Greek mythology.[7]
Based upon its spectrum, 47 Aglaja is listed as a C-type asteroid under the Tholen classification taxonomy, indicating a carbonaceous composition. The SMASS classification system rates it as a rare B-type asteroid. There is a broad absorption feature at 1 μm that is associated with the presence of magnetite and is what gives the asteroid its blue tint.[5]
On September 16, 1984, the star SAO 146599 was occulted by 47 Aglaja. This event was observed from 13 sites in the continental United States, allowing a cross-sectional profile to be determined. Based upon this study, the asteroid has a diameter of 136.4 ± 1.2 km. The geometric albedo at the time of the occultation was 0.071 ± 0.002.[8]
Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico during 2012 gave a light curve with a period of 13.175 ± 0.002 hours and a brightness variation of 0.09 ± 0.01 in magnitude. This result is in agreement with previous studies.[3]
References
- ↑ 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.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Asteroid Data Sets
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
