309 Fraternitas

309 Fraternitas

Discovery
Discovered by	Johann Palisa
Discovery date	6 April 1891
Designations
Named after	fraternity
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	125.03 yr (45667 d)
Aphelion	2.97127 AU (444.496 Gm)
Perihelion	2.35779 AU (352.720 Gm)
Semi-major axis	2.66453 AU (398.608 Gm)
Eccentricity	0.11512
Orbital period	4.35 yr (1588.7 d)
Average orbital speed	18.25 km/s
Mean anomaly	190.308°
Mean motion	0° 13^m 35.785^s / day
Inclination	3.71999°
Longitude of ascending node	356.574°
Argument of perihelion	310.477°
Earth MOID	1.34471 AU (201.166 Gm)
Jupiter MOID	2.24936 AU (336.499 Gm)
Jupiter Tisserand parameter	3.372
Physical characteristics
Dimensions	45.32±3.3 km
Mass	unknown
Mean density	unknown
Equatorial surface gravity	unknown
Equatorial escape velocity	unknown
Rotation period	22.398 h (0.9333 d)
Geometric albedo	0.0595±0.010
Temperature	unknown
Spectral type	unknown
Absolute magnitude (H)	10.7

309 Fraternitas is a typical Main belt asteroid.^[2] It was discovered by Johann Palisa on April 6, 1891 in Vienna.

References

1. "309 Fraternitas". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
2. "Osculating elements from astorb-database for 309 Fraternitas". The Centaur Research Project. Retrieved 5 April 2015.

External links

• 309 Fraternitas at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters