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JPL Small-Body Database Browser
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309 Fraternitas
Classification: Main-belt Asteroid          SPK-ID: 2000309
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1135202457548508 2.8304e-08  
a 2.664996203339764 6.8354e-09 au
q 2.36246517940089 7.4313e-08 au
i 3.714272594918841 3.1466e-06 deg
node 356.5276715797852 4.9485e-05 deg
peri 310.6413373978529 5.1624e-05 deg
M 56.60780505700203 1.4805e-05 deg
tp 2458350.628264227306
(2018-Aug-20.12826423)
6.5279e-05 TDB
period 1589.071061624623
4.35
6.1137e-06
1.674e-08
d
yr
n .2265474519635049 8.716e-10 deg/d
Q 2.967527227278638 7.6113e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3069  
   data-arc span      46996 days (128.67 yr)  
   first obs. used      1891-04-06  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42925  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:41:00  

Additional Information
 Earth MOID = 1.34902 au 
 Jupiter MOID = 2.25864 au 
 T_jup = 3.372 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.6   n/a MPO416705  
diameter diameter 41.075 km 0.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 22.398 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, N.M.; Krugly, Yu.N.; et al. (2005) Abstr. IAU Symp. 229, p. 133.]
[Pilcher, F. (2015) Minor Planet Bull. 42, 38-39.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.056   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

309 Fraternitas          Discovered 1891-Apr-06 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1925 BC = 1927 RA = 1943 FB = 1974 LB = A914 TE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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