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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03467553509958183 3.8546e-08  
a 2.156427488859787 1.4427e-08 AU
q 2.081652211780126 8.146e-08 AU
i 2.273472923150405 7.5934e-06 deg
node 214.2492631922364 0.00010807 deg
peri 249.8143207647348 0.00016393 deg
M 86.56480298427527 0.00012383 deg
tp 2456522.375299903057
(2013-Aug-17.87529990)
0.00039737 JED
period 1156.646680673293
3.17
1.1608e-05
3.178e-08
d
yr
n .3112445710650734 3.1235e-09 deg/d
Q 2.231202765939447 1.4928e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      682  
   data-arc span      8656 days (23.70 yr)  
   first obs. used      1990-10-16  
   last obs. used      2014-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54968  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:46:09  

Additional Information
 Earth MOID = 1.09938 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 (809)
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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