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21012 (1988 RU9)
Classification: Main-belt Asteroid          SPK-ID: 2021012
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08368943343914102 8.2864e-08  
a 3.114186376167266 4.4126e-08 AU
q 2.853561882721936 2.5533e-07 AU
i 15.60166704435016 1.0188e-05 deg
node 167.4220700267468 2.4117e-05 deg
peri 239.4073364878332 6.7083e-05 deg
M 191.8570004838618 6.0423e-05 deg
tp 2457738.043910430364
(2016-Dec-15.54391043)
0.00034178 JED
period 2007.314064374929
5.50
4.2663e-05
1.168e-07
d
yr
n .179344132733959 3.8118e-09 deg/d
Q 3.374810869612596 4.7819e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      9302 days (25.47 yr)  
   first obs. used      1988-09-08  
   last obs. used      2014-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53593  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:13:57  

Additional Information
 Earth MOID = 1.89231 AU 
 T_jup = 3.156 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3 mag n/a MPO266066  

21012 (1988 RU9)          Discovered 1988-Sep-08 by Debehogne, H. at La Silla (809)
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 RU9 = 1988 RS11 = 1999 RE32 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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