386 Siegena

386 Siegena
	A three-dimensional model of 386 Siegena based on its light curve
Discovery
Discovered by	Max Wolf
Discovery date	1 March 1894
Designations
MPC designation	(386) Siegena
Pronunciation	/ˈsiːɡənə/ SEE-gə-nə[1]
Named after	Siegen
Alternative designations	1894 AY
Minor planet category	Main belt
Adjectives	Siegenian /siːˈɡɛniən/ see-GHEN-ee-ən[2]
Orbital characteristics[3]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	122.08 yr (44590 d)
Aphelion	3.38983 AU (507.111 Gm)
Perihelion	2.40159 AU (359.273 Gm)
Semi-major axis	2.89571 AU (433.192 Gm)
Eccentricity	0.17064
Orbital period (sidereal)	4.93 yr (1799.8 d)
Mean anomaly	66.7510°
Mean motion	0° 12m 0.068s / day
Inclination	20.2568°
Longitude of ascending node	166.886°
Argument of perihelion	219.478°
Physical characteristics
Dimensions	165.01±2.7 km[3]; 170.35 ± 8.40 km[4]
Mass	(8.14 ± 1.58) × 1018 kg[4]
Mean density	3.14 ± 0.76 g/cm3[4]
Synodic rotation period	9.763 h (0.4068 d)
Geometric albedo	0.0692±0.002
Spectral type	C
Absolute magnitude (H)	7.43

Siegena (minor planet designation: 386 Siegena) is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.

It was discovered by Max Wolf on March 1, 1894, in Heidelberg.

During 1999, the asteroid was observed occulting a star. The resulting chords provided a diameter estimate of 174 km.[5]

References

per "siegenite". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
"Siegenian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
"386 Siegena (1894 AY)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 10 May 2016.
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.
Shevchenko, Vasilij G.; Tedesco, Edward F. (September 2006), "Asteroid albedos deduced from stellar occultations", Icarus, 184 (1): 211–220, Bibcode:2006Icar..184..211S, doi:10.1016/j.icarus.2006.04.006.

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