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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08350282688774252 6.6236e-08  
a 3.114714614980582 3.8216e-08 AU
q 2.854627139681137 2.1466e-07 AU
i 15.60147088287406 6.6565e-06 deg
node 167.4144008866483 2.2548e-05 deg
peri 239.3886549515879 4.7501e-05 deg
M 227.7410038231319 4.6187e-05 deg
tp 2457738.146930031820
(2016-Dec-15.64693003)
0.00026667 JED
period 2007.824817121212
5.50
3.6952e-05
1.012e-07
d
yr
n .179298510970774 3.2998e-09 deg/d
Q 3.374802090280027 4.1407e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      9756 days (26.71 yr)  
   first obs. used      1988-09-08  
   last obs. used      2015-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50072  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:27  

Additional Information
 Earth MOID = 1.89438 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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