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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .196323792391684 5.7215e-08  
a 2.202224073350552 1.2608e-08 AU
q 1.76987509157411 1.2956e-07 AU
i 4.839343782864724 6.1651e-06 deg
node 86.66152223602407 6.9089e-05 deg
peri 233.1539383338339 7.1098e-05 deg
M 48.57287950170821 1.9052e-05 deg
tp 2456639.442098979342
(2013-Dec-12.94209898)
6.2783e-05 JED
period 1193.687608439966
3.27
1.0251e-05
2.807e-08
d
yr
n .3015864430983622 2.5899e-09 deg/d
Q 2.634573055126995 1.5083e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1130  
   data-arc span      21048 days (57.63 yr)  
   first obs. used      1955-11-19  
   last obs. used      2013-07-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50337  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:49:55  

Additional Information
 Earth MOID = .760857 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 13.7 mag n/a MPO265994  

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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