381 Myrrha

Last updated
381 Myrrha
Discovery
Discovered by Auguste Charlois
Discovery date10 January 1894
Designations
(381) Myrrha
Pronunciation /ˈmɪrə,ˈmɜːrə/
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)
350.739°
0° 10m 13.224s / day
Inclination 12.558°
125.102°
142.930°
Physical characteristics
Dimensions120.58±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

    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 AlhenaGeminorum) by Myrrha was observed in Japan and China on January 13, 1991, allowing the size and shape of Myrrha to be properly clarified.

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    References

    1. 1 2 Yeomans, Donald K., "381 Myrrha", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 10 May 2016.
    2. 1 2 3 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.
    3. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    4. 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.
    5. 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, ISBN   978-981-283-426-3.