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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1956813448385181 5.2292e-08  
a 2.203459196420073 1.1623e-08 au
q 1.772283337567793 1.1713e-07 au
i 4.835879601692565 6.138e-06 deg
node 86.60774468590425 6.2912e-05 deg
peri 233.4580528673204 6.5062e-05 deg
M 229.1323528428987 1.9603e-05 deg
tp 2457834.795910103761
(2017-Mar-22.29591010)
6.637e-05 JED
period 1194.691973407807
3.27
9.4532e-06
2.588e-08
d
yr
n .3013329025498644 2.3843e-09 deg/d
Q 2.634635055272353 1.3898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1244  
   data-arc span      21928 days (60.04 yr)  
   first obs. used      1955-11-19  
   last obs. used      2015-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48433  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:01:41  

Additional Information
 Earth MOID = .762409 au 
 Jupiter MOID = 2.66007 au 
 T_jup = 3.633 
[ 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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