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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08368942266842924 7.9904e-08  
a 3.11418637134791 4.2934e-08 AU
q 2.853561911847913 2.4842e-07 AU
i 15.60166824682252 9.8481e-06 deg
node 167.422069320751 2.4078e-05 deg
peri 239.4073475117369 6.3403e-05 deg
M 191.8569922716145 5.7912e-05 deg
tp 2457738.043954044464
(2016-Dec-15.54395404)
0.0003293 JED
period 2007.314059715304
5.50
4.1511e-05
1.137e-07
d
yr
n .1793441331502747 3.7088e-09 deg/d
Q 3.374810830847907 4.6527e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      760  
   data-arc span      9340 days (25.57 yr)  
   first obs. used      1988-09-08  
   last obs. used      2014-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5348  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:16:06  

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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