309 Fraternitas

309 Fraternitas
	Orbital diagram
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)
\|{{{apsis}}}\|helion}}	2.97127 astronomical unit\|AU (444.496 Gm)
\|{{{apsis}}}\|helion}}	2.35779 AU (352.720 Gm)
Semi-major axis	2.66453 AU (398.608 Gm)
Eccentricity	0.11512
Orbital period	4.35 yr (1,588.7 d) 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°
\|{{{apsis}}}\|helion}}	310.477°
Physical characteristics
Dimensions	45.32±3.3 km
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. The asteroid name is Latin for 'fraternity'; it was so named in order to commemorate the 25th anniversary of the Maturitätsprüfung Fraternity.^[3]

This minor planet is orbiting the Sun at a distance of 2.665 astronomical unit|AU with an orbital eccentricity (ovalness) of 0.115 and a period of 4.35 yr. The orbital plane is inclined at an angle of 3.72° of the ecliptic. 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.^[4]

References

↑ "309 Fraternitas". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=309;cad=1.
↑ "Osculating elements from astorb-database for 309 Fraternitas". The Centaur Research Project. http://www.kentauren.info/menu/index1.htm?page=/cgi-bin/astorb2txt.pl?Suchname=Fraternitas.
↑ Robinson, L. E. (June 2002), "Photometry of Five Difficult Asteroids: 309 Fraternitas, 366 Vincentina 421 Zahringia, 578 Happelia, 959 Anne", The Minor Planet Bulletin 29: 30–31, Bibcode: 2002MPBu...29...30R.
↑ 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 42 (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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Original source: https://en.wikipedia.org/wiki/309 Fraternitas. Read more

[jpldata-1] "309 Fraternitas". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=309;cad=1.

[2] "Osculating elements from astorb-database for 309 Fraternitas". The Centaur Research Project. http://www.kentauren.info/menu/index1.htm?page=/cgi-bin/astorb2txt.pl?Suchname=Fraternitas.

[Robinson_2002-3] Robinson, L. E. (June 2002), "Photometry of Five Difficult Asteroids: 309 Fraternitas, 366 Vincentina 421 Zahringia, 578 Happelia, 959 Anne", The Minor Planet Bulletin 29: 30–31, Bibcode: 2002MPBu...29...30R.

[Pilcher2015-4] 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 42 (1): pp. 38–39, Bibcode: 2015MPBu...42...38P.