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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08325941184469079 5.9924e-08  
a 3.115297734714674 3.5276e-08 au
q 2.855919877601233 2.0151e-07 au
i 15.60269887939957 6.0602e-06 deg
node 167.4084468254714 2.0315e-05 deg
peri 239.2838050815378 4.6231e-05 deg
M 299.5367686558556 4.6308e-05 deg
tp 2457737.815749035755
(2016-Dec-15.31574904)
0.00026218 JED
period 2008.388684384
5.50
3.4113e-05
9.34e-08
d
yr
n .1792481718300543 3.0445e-09 deg/d
Q 3.374675591828115 3.8213e-08 au
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      9950 days (27.24 yr)  
   first obs. used      1988-09-08  
   last obs. used      2015-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49326  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:46:50  

Additional Information
 Earth MOID = 1.89426 au 
 Jupiter MOID = 2.01173 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 13.4 mag n/a MPO309318  

21012 (1988 RU9)          Discovered 1988-Sep-08 by Debehogne, H. at La Silla
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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