Astronomy:381 Myrrha
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Short description: Main-belt asteroid
 381 Myrrha photographed in the constellation of Leo, with Messier 65, Messier 66 and NGC 3628 nearby | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 10 January 1894 |
| Designations | |
| (381) Myrrha | |
| Pronunciation | /ˈmɪrə, ˈmɜːrə/ |
| Named after | Myrrha |
| 1894 AS | |
| Minor planet category | Main belt |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.27 yr (44658 d) |
| |{{{apsis}}}|helion}} | 3.5124 astronomical unit|AU (525.45 Gm) |
| |{{{apsis}}}|helion}} | 2.93357 AU (438.856 Gm) |
| 3.22298 AU (482.151 Gm) | |
| Eccentricity | 0.089797 |
| Orbital period | 5.79 yr (2113.4 d) |
| Mean anomaly | 350.739° |
| Mean motion | 0° 10m 13.224s / day |
| Inclination | 12.558° |
| Longitude of ascending node | 125.102° |
| 142.930° | |
| 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] |
| Rotation period | 6.572 h (0.2738 d) |
| Geometric albedo | 0.0609±0.003 |
| C | |
| Absolute magnitude (H) | 8.25 |
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Myrrha (minor planet designation: 381 Myrrha) is a main-belt asteroid that was discovered by the French astronomer Auguste Charlois on January 10, 1894, in Nice.[3] It has been classified as a C-type asteroid and is most likely 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 properly clarified.
References
- ↑ 1.0 1.1 Yeomans, Donald K., "381 Myrrha", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=381, retrieved 10 May 2016.
- ↑ 2.0 2.1 2.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html, retrieved 2013-04-07.
- ↑ Ditteon, Richard; Hawkins, Scot (September 2007), "Asteroid Lightcurve Analysis at the Oakley Observatory - October-November 2006", The Minor Planet Bulletin 34 (3): pp. 59–64, Bibcode: 2007MPBu...34...59D.
- ↑ Morrison, D.; Chapman, C. R. (March 1976), "Radiometric diameters for an additional 22 asteroids", Astrophysical Journal 204: pp. 934–939, doi:10.1142/9789812834300_0469, ISBN 978-981-283-426-3, Bibcode: 2008mgm..conf.2594S.
External links
- The occultation of gamma Geminorum by the asteroid 381 Myrrha
- 381 Myrrha at AstDyS-2, Asteroids—Dynamic Site
- 381 Myrrha at the JPL Small-Body Database
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