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6889 (1971 RA)
Classification: Main-belt Asteroid          SPK-ID: 2006889
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1957490359125074 4.8859e-08  
a 2.20265028064152 1.0783e-08 au
q 1.771483611753529 1.109e-07 au
i 4.836367834418719 4.9445e-06 deg
node 86.58759516619348 6.2009e-05 deg
peri 233.5916543169739 6.3952e-05 deg
M 289.2893589117933 1.9743e-05 deg
tp 2457835.030335062836
(2017-Mar-22.53033506)
6.6247e-05 JED
period 1194.03415558486
3.27
8.7683e-06
2.401e-08
d
yr
n .3014989130052694 2.214e-09 deg/d
Q 2.633816949529512 1.2894e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1438  
   data-arc span      22065 days (60.41 yr)  
   first obs. used      1955-11-19  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47528  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:57:17  

Additional Information
 Earth MOID = .763062 au 
 Jupiter MOID = 2.66258 au 
 T_jup = 3.634 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO332884  

6889 (1971 RA)          Discovered 1971-Sep-15 by Torres, C., Petit, J. at Cerro El Roble
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1971 RA = 1971 SO2 = 1971 TL2 = 1981 WH6 = 1981 WR3 = 1987 MU 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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