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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962239969943324 5.2865e-08  
a 2.202449109891075 1.1536e-08 AU
q 1.770275742371638 1.1854e-07 AU
i 4.839095857397357 6.1516e-06 deg
node 86.6621324380947 6.3505e-05 deg
peri 233.1875841343752 6.5628e-05 deg
M 108.8618330715732 1.9206e-05 deg
tp 2456639.480722682772
(2013-Dec-12.98072268)
6.282e-05 JED
period 1193.870580415018
3.27
9.38e-06
2.568e-08
d
yr
n .3015402221192646 2.3691e-09 deg/d
Q 2.634622477410511 1.38e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1240  
   data-arc span      21667 days (59.32 yr)  
   first obs. used      1955-11-19  
   last obs. used      2015-03-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4832  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:26:38  

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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