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129730 (1998 WF21)
Classification: Main-belt Asteroid          SPK-ID: 2129730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2320044185614902 3.5809e-08  
a 2.647380916093853 1.3053e-08 au
q 2.033176845944713 9.9459e-08 au
i 5.879389591918224 3.4312e-06 deg
node 259.5968422293796 3.9314e-05 deg
peri 141.6207624866434 4.0269e-05 deg
M 6.863160219290363 9.7211e-06 deg
tp 2458970.505286747852
(2020-May-01.00528675)
4.2364e-05 TDB
period 1573.341788003551
4.31
1.1636e-05
3.186e-08
d
yr
n .2288123297461082 1.6922e-09 deg/d
Q 3.261584986242993 1.6081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      7654 days (20.96 yr)  
   first obs. used      1998-11-16  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57272  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 15:18:34  

Additional Information
 Earth MOID = 1.04575 au 
 Jupiter MOID = 2.16911 au 
 T_jup = 3.346 
[ 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 15.7   n/a MPO449742  

129730 (1998 WF21)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 WF21 = 2002 RR26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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