381 Myrrha

381 Myrrha
Discovery
Discovered by	Auguste Charlois
Discovery date	10 January 1894
Designations
MPC designation	(381) Myrrha
Pronunciation	/ˈmɪrə, ˈmɜːrə/
Named after	Myrrha
Alternative designations	1894 AS
Minor planet category	Main belt
Orbital characteristics
	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)
Semi-major axis	3.22298 AU (482.151 Gm)
Eccentricity	0.089797
Orbital period (sidereal)	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°
Argument of perihelion	142.930°
Physical characteristics
Dimensions	120.58±2.7 km; 147.2×126.6 km; 123.41 ± 6.30 km
Mass	(9.18 ± 0.80) × 1018 kg
Mean density	9.32 ± 1.64 g/cm3
Synodic rotation period	6.572 h (0.2738 d)
Geometric albedo	0.0609±0.003
Spectral type	C
Absolute magnitude (H)	8.25

3D model of 381 Myrrha, created by scientists via lightcurve inversion.^[1]

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.^[4] 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.^[5]

10μ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 126 km.^[6] 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[]

^ "(381) Myrrha - 3D Asteroid Catalogue". 3d-asteroids.space. Retrieved 30 January 2022.
^ ^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 7 April 2013.
^ 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, ISBN 978-981-283-426-3.

External links[]

The occultation of gamma Geminorum by the asteroid 381 Myrrha
381 Myrrha at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
381 Myrrha at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by .

[1] "(381) Myrrha - 3D Asteroid Catalogue". 3d-asteroids.space. Retrieved 30 January 2022.

[JPL-2] Yeomans, Donald K., "381 Myrrha", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 10 May 2016.

[Carry2012-3] 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.

[IAU_MPC-4] "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.

[Warner2008-5] 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.

[Morrison1976-6] 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.

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