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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962239939133988 5.7098e-08  
a 2.202449109311666 1.244e-08 AU
q 1.770275748691524 1.2915e-07 AU
i 4.839095670403101 6.164e-06 deg
node 86.66215292118301 6.8945e-05 deg
peri 233.1875625637027 7.0959e-05 deg
M 108.8618341530865 1.9209e-05 deg
tp 2456639.480719238604
(2013-Dec-12.98071924)
6.2812e-05 JED
period 1193.870579943903
3.27
1.0115e-05
2.769e-08
d
yr
n .3015402222382559 2.5547e-09 deg/d
Q 2.634622469931809 1.4881e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1133  
   data-arc span      21522 days (58.92 yr)  
   first obs. used      1955-11-19  
   last obs. used      2014-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50275  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:02:53  

Additional Information
 Earth MOID = .763139 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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