349 Dembowska
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A three-dimensional model of 349 Dembowska based on its light curve.
|
|
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | December 9, 1892 |
| Designations | |
|
Named after
|
Ercole Dembowski |
| 1892 T | |
| Main belt | |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 475.88 Gm (3.181 AU) |
| Perihelion | 399.743 Gm (2.672 AU) |
| 437.812 Gm (2.927 AU) | |
| Eccentricity | 0.087 |
| 1828.662 d (5.00 a) | |
|
Average orbital speed
|
17.41 km/s |
| 198.148° | |
| Inclination | 8.256° |
| 32.5° | |
| 347.171° | |
| Physical characteristics | |
| Dimensions | ~140 km[1][2] 145.23 ± 17.21[3] km |
| Mass | (3.58 ± 1.03) × 1018[3] kg |
|
Mean density
|
2.23 ± 1.01[3] g/cm3 |
| 4.701207 ± 0.000058 h[1][2] | |
| Albedo | 0.384 (Bright)[1][4] |
| Temperature | ~148 K |
|
Spectral type
|
R[1][2] |
| 5.93[1] | |
349 Dembowska is a large asteroid of the main belt, discovered on December 9, 1892, by the French astronomer Auguste Charlois while working at the observatory in Nice, France.[5] It is named in honor of the Baron Hercules Dembowski, an Italian astronomer who made significant contributions to research on double and multiple stars.
Orbiting just below the prominent 7:3 resonance with Jupiter, 349 Dembowska is among the larger asteroids in the main belt with an estimated diameter of ~140 km.[2] It has a rotational period of 4.7012 hours,[2] and is classified as an R-type asteroid for the presence of strong absorption lines in olivine and pyroxene with little or no metals. It may have undergone partial melting/differentiation.[6] 349 Dembowska has an unusually high albedo of 0.384. Of the asteroids with a diameter greater than 75 km, only 4 Vesta has a higher known albedo.[4]
Dembowska and 16 Psyche have orbits that repeat themselves almost exactly every five years in respect to their position to the Sun and Earth.
In 1988 a search for satellites or dust orbiting this asteroid was performed using the UH88 telescope at the Mauna Kea Observatories, but the effort came up empty.[7] There was one occultation on October 31, 2006,[8] and on December 5, 2007.[9]
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 2.3 2.4 Majaess D. J., Tanner J., Savoy J., Sampson B. (2008). 349 Dembowska: A Minor Study of its Shape and Parameters, Minor Planet Bulletin, 35, 88
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Charlois, A.; Benennung von kleinen Planeten, Astronomische Nachrichten, Vol. 132, No. 3155, p. 175
- ↑ Expanding the Spectral Compositional Information of Asteroid 349 Dembowska
- ↑ 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.
External links
- Orbital simulation from JPL (Java) / Ephemeris
