3391 Sinon

3391 Sinon

Discovery
Discovered by	Hiroki Kosai and Kiichiro Hurukawa
Discovery date	18 February 1977
Designations
Named after	Sinon
Alternative names	1977 DD3
Minor planet category	Jupiter Trojan
Orbital characteristics[1][2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	21977 days (60.17 yr)
Aphelion	5.73907 AU (858.553 Gm)
Perihelion	4.86540 AU (727.853 Gm)
Semi-major axis	5.30224 AU (793.204 Gm)
Eccentricity	0.082387
Orbital period	12.21 yr (4459.51 d)
Average orbital speed	12.92 km/s
Mean anomaly	135.426°
Mean motion	0° 4^m 50.615^s / day
Inclination	14.8699°
Longitude of ascending node	341.136°
Argument of perihelion	103.544°
Earth MOID	3.91963 AU (586.368 Gm)
Jupiter MOID	0.259194 AU (38.7749 Gm)
Jupiter Tisserand parameter	2.926
Physical characteristics
Dimensions	? km
Mass	?×10^? kg
Mean density	? g/cm³
Equatorial surface gravity	? m/s²
Equatorial escape velocity	? km/s
Rotation period	8.135 h (0.3390 d)
Sidereal rotation period	? d
Axial tilt	?°
Pole ecliptic latitude	?
Pole ecliptic longitude	?
Geometric albedo	0.10
Temperature	~121 K
Spectral type	?
Absolute magnitude (H)	10.3

3391 Sinon is a Jupiter Trojan asteroid that orbits in the L₄ Lagrangian point of the Sun-Jupiter system, in the "Greek Camp" of Trojan asteroids. It was named after the Greek hero Sinon, who was a warrior during the Trojan War. It was discovered by Hiroki Kosai and Kiichiro Hurukawa at the Kiso Observatory in Japan on February 18, 1977.

References

1. "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
2. "3391 Sinon (1977 DD3)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 April 2016.

External links

• Discovery Circumstances: Numbered Minor Planets
• Orbital simulation from JPL (Java) / Ephemeris
• 3391 Sinon at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters