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21121 (1992 WV)
Classification: Main-belt Asteroid          SPK-ID: 2021121
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1633687566986682 2.8688e-08  
a 2.417490553315701 8.2419e-09 au
q 2.02254812728974 6.9015e-08 au
i 5.593366251795805 3.165e-06 deg
node 229.0799361885668 4.2773e-05 deg
peri 185.6899255196418 4.4989e-05 deg
M 168.746612685099 1.5113e-05 deg
tp 2458556.956114250985
(2019-Mar-14.45611425)		 5.6071e-05 TDB
period 1372.921181546795
3.76		 7.021e-06
1.922e-08		 d
yr
n .2622146156958608 1.3409e-09 deg/d
Q 2.812432979341663 9.5883e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1643  
   data-arc span      10052 days (27.52 yr)  
   first obs. used      1992-11-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50109  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:49  

Additional Information
 Earth MOID = 1.03329 au 
 Jupiter MOID = 2.53693 au 
 T_jup = 3.491 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO492973  

21121 (1992 WV)          Discovered 1992-Nov-16 by Endate, K., Watanabe, K. at Kitami
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1992 WV = 1998 KY57 = 1999 RJ117 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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