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22011 (1999 XR81)
Classification: Main-belt Asteroid          SPK-ID: 2022011
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784405908197861 4.1985e-08  
a 3.110874547678968 2.2984e-08 au
q 2.555768255424898 1.3422e-07 au
i 18.52574655131819 4.9796e-06 deg
node 84.96404539756293 1.8804e-05 deg
peri 24.3280280228342 2.5526e-05 deg
M 273.1385425847067 1.7671e-05 deg
tp 2459684.056009039054
(2022-Apr-14.55600904)
0.00010074 TDB
period 2004.112853204438
5.49
2.221e-05
6.081e-08
d
yr
n .1796306028497272 1.9907e-09 deg/d
Q 3.665980839933038 2.7085e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1038  
   data-arc span      11244 days (30.78 yr)  
   first obs. used      1990-04-30  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49818  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:57:38  

Additional Information
 Earth MOID = 1.58252 au 
 Jupiter MOID = 1.59352 au 
 T_jup = 3.115 
[ 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 13.69   n/a E2021B10  

22011 (1999 XR81)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XR81 = 1990 HL3 = 1996 LZ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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