381 Myrrha
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 10 January 1894 |
| Designations | |
Named after | Myrrha |
| 1894 AS | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.27 yr (44658 d) |
| Aphelion | 3.5124 AU (525.45 Gm) |
| Perihelion | 2.93357 AU (438.856 Gm) |
| 3.22298 AU (482.151 Gm) | |
| Eccentricity | 0.089797 |
| 5.79 yr (2113.4 d) | |
Average orbital speed | 16.6 km/s |
| 350.739° | |
| 0° 10m 13.224s / day | |
| Inclination | 12.558° |
| 125.102° | |
| 142.930° | |
| Earth MOID | 1.92798 AU (288.422 Gm) |
| Jupiter MOID | 1.69862 AU (254.110 Gm) |
| TJupiter | 3.145 |
| Physical characteristics | |
| Dimensions | 120.58±2.7 km[1] 147.2×126.6 km 123.41 ± 6.30 km[2] |
| Mass | (9.18 ± 0.80) × 1018 kg[2] |
Mean density | 9.32 ± 1.64 g/cm3[2] |
| 6.572 h (0.2738 d) | |
| 0.0609±0.003 | |
| C | |
| 8.25 | |
381 Myrrha is a very large main-belt asteroid that was discovered by French astronomer Auguste Charlois on January 10, 1894, in Nice.[3] It is classified as a C-type asteroid and is probably composed of carbonaceous material.
Photometric observations of this asteroid at the Oakley Observatory in Terre Haute, Indiana during 2006 gave a light curve with a period of 6.572 ± 0.002 hours and a brightness variation of 0.34 ± 0.05 in magnitude.[4]
10µ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 126 km.[5] The occultation of Alhena (γ Geminorum) by Myrrha was observed in Japan and China on January 13, 1991, allowing the size and shape of Myrrha to be clarified.
References
- ^ a b Yeomans, Donald K., "381 Myrrha", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 10 May 2016.
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 2013-04-07.
- ^ Ditteon, Richard; Hawkins, Scot (September 2007), "Asteroid Lightcurve Analysis at the Oakley Observatory - October-November 2006", The Minor Planet Bulletin, vol. 34, no. 3, pp. 59–64, Bibcode:2007MPBu...34...59D.
- ^ Morrison, D.; Chapman, C. R. (March 1976), "Radiometric diameters for an additional 22 asteroids", Astrophysical Journal, vol. 204, pp. 934–939, Bibcode:2008mgm..conf.2594S, doi:10.1142/9789812834300_0469.
External links
- The occultation of gamma Geminorum by the asteroid 381 Myrrha
- 381 Myrrha at the JPL Small-Body Database
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