| 词条 | 309 Fraternitas |
| 释义 |
| minorplanet=yes | background=#D6D6D6 | name=309 Fraternitas | discoverer=Johann Palisa | discovered=6 April 1891 | mpc_name=(309) Fraternitas | alt_names= | named_after=fraternity | mp_category=Main belt | epoch=31 July 2016 (JD 2457600.5) | semimajor={{Convert|2.66453|AU|Gm|abbr=on}} | perihelion={{Convert|2.35779|AU|Gm|abbr=on}} | aphelion={{Convert|2.97127|AU|Gm|abbr=on|lk=on}} | eccentricity=0.11512 | period=4.35 yr (1588.7 d) | inclination=3.71999° | asc_node=356.574° | arg_peri=310.477° | mean_anomaly=190.308° | dimensions={{val|45.32|3.3|ul=km}} | mass= | density= | rotation={{Convert|22.398|h|d|abbr=on|lk=on}} | spectral_type= | abs_magnitude=10.7 | albedo={{val|0.0595|0.010}} | mean_motion={{Deg2DMS|0.226607|sup=ms}} / day | orbit_ref=[1] | observation_arc=125.03 yr (45667 d) | uncertainty=0 }} 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. References1. ^{{Cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=309;cad=1 |title=309 Fraternitas |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=11 May 2016}} 2. ^{{cite web|url=http://www.kentauren.info/menu/index1.htm?page=/cgi-bin/astorb2txt.pl%3FSuchname%3DFraternitas|title=Osculating elements from astorb-database for 309 Fraternitas|publisher=The Centaur Research Project|accessdate=5 April 2015}} External links
4 : Background asteroids|Discoveries by Johann Palisa|Named minor planets|Astronomical objects discovered in 1891 |
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