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21158 (1993 RP18)
Classification: Main-belt Asteroid          SPK-ID: 2021158
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03434989786098906 3.5046e-08  
a 2.156525131635504 1.2979e-08 au
q 2.082448713629168 7.6211e-08 au
i 2.273678737177833 5.8505e-06 deg
node 214.2353820135949 0.00010752 deg
peri 250.2924544385346 0.0001531 deg
M 335.0376908952578 0.00011279 deg
tp 2457680.707036138850
(2016-Oct-19.20703614)
0.00036274 JED
period 1156.725240795154
3.17
1.0442e-05
2.859e-08
d
yr
n .3112234325867477 2.8095e-09 deg/d
Q 2.23060154964184 1.3424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      834  
   data-arc span      9209 days (25.21 yr)  
   first obs. used      1990-10-16  
   last obs. used      2016-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54418  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:31:49  

Additional Information
 Earth MOID = 1.09903 au 
 Jupiter MOID = 2.79421 au 
 T_jup = 3.699 
[ 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 15.8 mag n/a MPO244372  

21158 (1993 RP18)          Discovered 1993-Sep-15 by Debehogne, H., Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 RP18 = 1998 EN15 = 2000 WZ144 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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