Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
309 Fraternitas (A891 GA)
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136541185002914 2.0412e-08  
a 2.665474432463611 5.7104e-09 au
q 2.362532285456895 5.2446e-08 au
i 3.714397526495606 7.2562e-07 deg
node 356.5052792543258 1.2421e-05 deg
peri 310.9635686893559 1.0084e-05 deg
M 236.5357082959721 7.5053e-06 deg
tp 2459941.628737120494
(2022-Dec-28.12873712)
3.4111e-05 TDB
period 1589.498815040587
4.35
5.1079e-06
1.398e-08
d
yr
n .22648648529556 7.2783e-10 deg/d
Q 2.968416579470328 6.3594e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3858  
   data-arc span      47565 days (130.23 yr)  
   first obs. used      1891-04-06  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:52:40  

Additional Information
 Earth MOID = 1.34934 au 
 Jupiter MOID = 2.25865 au 
 T_jup = 3.371 
[ 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 10.67   n/a MPO614063  
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. 2020-October); 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 (A891 GA)          Discovered 1891-Apr-06 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A891 GA = 1925 BC = 1927 RA = 1943 FB = 1974 LB = A914 TE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-04 03:55 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin