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6861 (1991 FA3)
Classification: Main-belt Asteroid          SPK-ID: 2006861
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1378770655719223 5.2415e-08  
a 3.1405924832329 3.3137e-08 au
q 2.707576807487511 1.618e-07 au
i 10.71362741318818 8.5928e-06 deg
node 21.68279610304472 3.1729e-05 deg
peri 257.1195083559625 4.8864e-05 deg
M 122.0712510238485 3.8268e-05 deg
tp 2456911.170758367932
(2014-Sep-10.67075837)
0.00021579 JED
period 2032.899023366795
5.57
3.2174e-05
8.809e-08
d
yr
n .1770870052383538 2.8027e-09 deg/d
Q 3.573608158978289 3.7706e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1128  
   data-arc span      15301 days (41.89 yr)  
   first obs. used      1974-03-21  
   last obs. used      2016-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47923  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:54:18  

Additional Information
 Earth MOID = 1.71746 au 
 Jupiter MOID = 1.66169 au 
 T_jup = 3.169 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2 mag n/a MPO265994  
rotation period rot_per 19.4659 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

6861 (1991 FA3)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 FA3 = 1974 FK1 = 1976 SV9 = 1982 UY9 = 1987 RF3 = 1988 VG6 = 1993 TP11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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