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322694 (1999 XA8)
Classification: Main-belt Asteroid          SPK-ID: 2322694
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2159104615213127 6.4772e-08  
a 3.076499671371191 3.9698e-08 au
q 2.412251207455271 2.1389e-07 au
i 14.19260846160642 1.3418e-05 deg
node 353.4993036698241 2.1859e-05 deg
peri 113.5143094153261 3.8399e-05 deg
M 286.9843430868513 3.003e-05 deg
tp 2459600.258063382193
(2022-Jan-20.75806338)
0.00016711 TDB
period 1970.986893794193
5.40
3.815e-05
1.044e-07
d
yr
n .1826496163589359 3.5353e-09 deg/d
Q 3.740748135287112 4.827e-08 au
  Orbit Determination Parameters
   # obs. used (total)      276  
   data-arc span      7642 days (20.92 yr)  
   first obs. used      1999-12-04  
   last obs. used      2020-11-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60019  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 07:10:33  

Additional Information
 Earth MOID = 1.46873 au 
 Jupiter MOID = 1.54843 au 
 T_jup = 3.147 
[ 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 15.8   n/a MPO402276  

322694 (1999 XA8)          Discovered 1999-Dec-04 by Pravec, P. at Ondrejov
Reference: 20120406/Numbers.arcLast Updated: 2012-04-09

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