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 kg[3] |
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] | |
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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 2 3 4 5 "JPL Small-Body Database Browser: 349 Dembowska (1892 T)". Retrieved 2008-05-02.
- 1 2 3 4 5 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
- 1 2 3 Carry, B. (December 2012). "Density of asteroids". Planetary and Space Science 73: 98–118. arXiv:1203.4336. Bibcode:2012P&SS...73...98C. doi:10.1016/j.pss.2012.03.009. See Table 1.
- 1 2 "Asteroid Albedos (JPG)". JPL Small-Body Database Search Engine. Retrieved 2008-05-02. External link in
|publisher=(help) - ↑ Charlois, A.; Benennung von kleinen Planeten, Astronomische Nachrichten, Vol. 132, No. 3155, p. 175
- ↑ Expanding the Spectral Compositional Information of Asteroid 349 Dembowska
- ↑ 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 19: 405–406. Bibcode:1988LPI....19..405G.
- ↑ "OCCULTATION BY (349) DEMBOWSKA - 2006 OCT 31". Royal Astronomical Society of New Zealand.
- ↑ "349 Dembowska – UCAC2 42014653 (Occultation 2007-12-05 22:43UT)" (PDF). Retrieved 2007-09-22.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 349 Dembowska at the JPL Small-Body Database
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