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227454 (2005 WJ99)
Classification: Main-belt Asteroid          SPK-ID: 2227454
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04794315565348096 4.4764e-08  
a 2.77125744290801 2.1795e-08 au
q 2.638394615966804 1.29e-07 au
i 2.518045765005851 5.3628e-06 deg
node 233.8089115244885 0.00012633 deg
peri 37.9898233773828 0.00014187 deg
M 254.3211015307044 6.4773e-05 deg
tp 2459695.151707668410
(2022-Apr-25.65170767)
0.00030308 TDB
period 1685.053661042524
4.61
1.9878e-05
5.442e-08
d
yr
n .2136430478880251 2.5203e-09 deg/d
Q 2.904120269849217 2.284e-08 au
  Orbit Determination Parameters
   # obs. used (total)      270  
   data-arc span      8396 days (22.99 yr)  
   first obs. used      1998-03-23  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60992  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:39:49  

Additional Information
 Earth MOID = 1.62094 au 
 Jupiter MOID = 2.13157 au 
 T_jup = 3.334 
[ 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 16.1   n/a MPO413103  

227454 (2005 WJ99)          Discovered 2005-Nov-28 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
Alternate Designations
 2005 WJ99 = 2009 RJ44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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