48 Doris: Difference between revisions
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|author=Ludek Vasta, Jan Manek |
|author=Ludek Vasta, Jan Manek |
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|url=http://mpocc.astro.cz/world/mpocc1.txt |
|url=http://mpocc.astro.cz/world/mpocc1.txt |
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|accessdate=2008-12-07}}</ref> Observations of an occultation on October 14, 1999, using four well placed [[Chord ( |
|accessdate=2008-12-07}}</ref> Observations of an occultation on October 14, 1999, using four well placed [[Chord (astronomy)|chords]], indicate an ellipsoid of 278×142 km and that 48 Doris is an extremely irregular shaped object.<ref name=RASNZ>{{cite web |
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|title=Occultation of HIP 29126 by (48) Doris - 2001 November 28 |
|title=Occultation of HIP 29126 by (48) Doris - 2001 November 28 |
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|publisher=Royal Astronomical Society of New Zealand |
|publisher=Royal Astronomical Society of New Zealand |
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Revision as of 17:50, 11 July 2010
| Discovery | |
|---|---|
| Discovered by | Hermann Mayer Salomon Goldschmidt |
| Discovery date | September 19, 1857 |
| Designations | |
| Main belt | |
| Adjectives | Dorian |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 500.093 Gm (3.343 AU) |
| Perihelion | 430.463 Gm (2.877 AU) |
| 465.278 Gm (3.110 AU) | |
| Eccentricity | 0.075 |
| 2003.453 d (5.49 a) | |
Average orbital speed | 16.87 km/s |
| 336.191° | |
| Inclination | 6.554° |
| 183.754° | |
| 257.583° | |
| Physical characteristics | |
| Dimensions | 278×142km[2] 221.8 km (IRAS)[1] |
| Mass | 1.7×1019 kg[3][4] (assumed)[5] |
Mean density | 2.1 to 3.1 g/cm³ |
| 0.0620 m/s² | |
| 0.1173 km/s | |
| 11.89 h[1] | |
| Albedo | 0.062[1][6] |
| Temperature | ~158 K |
Spectral type | C[1] |
| 6.90[1] | |
48 Doris (Template:Pron-en, Greek Δωρις) is one of the largest main belt asteroids. Doris was discovered by H. Goldschmidt on September 19, 1857 and named after Doris, an Oceanid in Greek mythology.
Doris will pass within 0.019 AU of Pallas in June 2132.[7]
Occultations
An occultation on March 19, 1981, suggested a diameter of 219±25 km.[8] Observations of an occultation on October 14, 1999, using four well placed chords, indicate an ellipsoid of 278×142 km and that 48 Doris is an extremely irregular shaped object.[2]
In popular culture
48 Doris is a location in the text-based science fiction game Federation 2.
References
- ^ a b c d e f "JPL Small-Body Database Browser: 48 Doris". 2008-06-13 last obs. Retrieved 2008-11-10.
{{cite web}}: Check date values in:|date=(help) - ^ a b "Occultation of HIP 29126 by (48) Doris - 2001 November 28". Royal Astronomical Society of New Zealand. Retrieved 2008-11-30.
- ^ Michalak, G. (2001). "Determination of asteroid masses". Astronomy & Astrophysics. 374: 703–711. doi:10.1051/0004-6361:20010731. Retrieved 2008-11-10.
- ^ (Mass estimate of Doris 0.09 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 1.786E+19
- ^ Michalak2001 assumed masses of perturbing asteroids used in calculations of perturbations of the test asteroids.
- ^ Asteroid Data Sets
- ^ "JPL Close-Approach Data: 48 Doris". 2009-08-11 last obs. Retrieved 2010-02-23.
{{cite web}}: Check date values in:|date=(help) - ^ Ludek Vasta, Jan Manek (2005-07-26). "Observed Minor Planet Occultation Events". Asteroidal Occultations (Czech Astronomical Society). Retrieved 2008-12-07.
External links
- Orbital simulation from JPL (Java) / Ephemeris
_mathilde.jpg){kind=small} | This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |