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
Named after	Siegen
Alternative designations	1894 AY
Minor planet category	Main belt
Adjectives	Siegenian /siːˈɡɛniən/ see-GHEN-ee-ən
Orbital characteristics
	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; 170.35 ± 8.40 km
Mass	(8.14 ± 1.58) × 1018 kg
Mean density	3.14 ± 0.76 g/cm3
Synodic rotation period	9.763 h (0.4068 d)
Geometric albedo	0.0692±0.002
Spectral type	C
Absolute magnitude (H)	7.43

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.)
^ ^a ^b "386 Siegena (1894 AY)". JPL Small-Body Database. 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.
^ 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.