309 Fraternitas

309 Fraternitas
Discovery
Discovered by	Johann Palisa
Discovery date	6 April 1891
Designations
MPC designation	(309) Fraternitas
Pronunciation	/frəˈtɜːrnɪtæs/
Named after	fraternity
Minor planet category	Main belt
Orbital characteristics
	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 (sidereal)	4.35 yr (1588.7 d)
Mean anomaly	190.308°
Mean motion	0° 13m 35.785s / day
Inclination	3.71999°
Longitude of ascending node	356.574°
Argument of perihelion	310.477°
Physical characteristics
Dimensions	45.32±3.3 km
Synodic rotation period	22.398 h (0.9333 d)
Geometric albedo	0.0595±0.010
Absolute magnitude (H)	10.7

Fraternitas (minor planet designation: 309 Fraternitas) is a typical Main belt asteroid.^[2] It was discovered by Johann Palisa on 6 April 1891 in Vienna.

Analysis of the asymmetric bimodal light curve of the asteroid from photometric data collected during 2014 provide a rotation period of 22.398±0.001 h with a brightness variation of 0.12±0.01 in magnitude.^[3]

References[]

^ "309 Fraternitas". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 15 September 2020. Retrieved 11 May 2016.
^ "Osculating elements from astorb-database for 309 Fraternitas". The Centaur Research Project. Retrieved 5 April 2015.
^ Pilcher, Frederick (January 2015), "Rotation Period Determinations for 275 Sapientia, 309 Fraternitas, and 924 Toni", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, vol. 42, no. 1, pp. 38–39, Bibcode:2015MPBu...42...38P.

External links[]

309 Fraternitas at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
309 Fraternitas at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[jpldata-1] "309 Fraternitas". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 15 September 2020. Retrieved 11 May 2016.

[2] "Osculating elements from astorb-database for 309 Fraternitas". The Centaur Research Project. Retrieved 5 April 2015.

[Pilcher2015-3] Pilcher, Frederick (January 2015), "Rotation Period Determinations for 275 Sapientia, 309 Fraternitas, and 924 Toni", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, vol. 42, no. 1, pp. 38–39, Bibcode:2015MPBu...42...38P.

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