345 Tercidina
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| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | November 23, 1892 |
| Designations | |
| Alternative names | 1892 O |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 369.214 Gm (2.468 AU) |
| Perihelion | 326.411 Gm (2.182 AU) |
| Semi-major axis | 347.812 Gm (2.325 AU) |
| Eccentricity | 0.062 |
| Orbital period | 1294.85 d (3.55 a) |
| Average orbital speed | 19.53 km/s |
| Mean anomaly | 201.557° |
| Inclination | 9.751° |
| Longitude of ascending node | 212.797° |
| Argument of perihelion | 229.931° |
| Physical characteristics | |
| Dimensions |
126x94x90km[1][2][3] 94 km[3] 98.78 ± 2.63[4] km |
| Mass | (2.68 ± 1.18) × 1018[4] kg |
| Mean density | 5.30 ± 2.37[4] g/cm3 |
| Rotation period | 12.371 h[3] |
| Albedo | 0.065[3] |
| Spectral type | C[3] |
| Absolute magnitude (H) | 8.71[3] |
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345 Tercidina is a large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.
It was discovered by Auguste Charlois on November 23, 1892, in Nice.
Size
Observations of an occultation of a bright 5.5 magnitude star on September 17, 2002, produced seventy-five chords indicating an ellipsoid of 111×90 km.[2]
Observations of an occultation on November 15, 2005, near Grass Valley, CA, produced five chords indicating an incomplete outline of 126×111 km.[1] This larger result may be caused by a different orientation of the asteroid as it passed in front of the star.
References
- ↑ 1.0 1.1 Richard Nugent (2005-11-15). "345 Tercidina 2005 Nov 15". Richard's Astronomy Pages. Archived from the original on 27 December 2008. Retrieved 2008-12-03.
- ↑ 2.0 2.1 "2002 European Asteroidal Occultation Results". euraster.net (a website for Asteroidal Occultation Observers in Europe). 2002-09-17. Retrieved 2008-12-03. (Chords)
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "JPL Small-Body Database Browser: 345 Tercidina (1892 O)". 2008-08-26 last obs. Retrieved 2008-12-03.
- ↑ 4.0 4.1 4.2 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.
External links
- Orbital simulation from JPL (Java)
- Ephemeris
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