917 Lyka

917 Lyka

Discovery
Discovered by	G. N. Neujmin
Discovery site	Simeis
Discovery date	5 September 1915
Designations
Alternative names	1915 S4
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	89.63 yr (32738 days)
Aphelion	2.8603 AU (427.89 Gm)
Perihelion	1.9034 AU (284.74 Gm)
Semi-major axis	2.3819 AU (356.33 Gm)
Eccentricity	0.20087
Orbital period	3.68 yr (1342.7 d)
Mean anomaly	166.936°
Mean motion	0° 16^m 5.232^s / day
Inclination	5.1331°
Longitude of ascending node	343.460°
Argument of perihelion	359.516°
Earth MOID	0.894667 AU (133.8403 Gm)
Jupiter MOID	2.53302 AU (378.934 Gm)
Jupiter Tisserand parameter	3.505
Physical characteristics
Mean radius	14.05±1.95 km
Rotation period	7.92 h (0.330 d)
Geometric albedo	0.0891±0.031
Absolute magnitude (H)	11.6

917 Lyka is a minor planet orbiting the Sun.

References

1. "917 Lyka (1915 S4)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016.

External links

• Discovery Circumstances: Numbered Minor Planets
• 917 Lyka at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters