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JPL Small-Body Database Browser
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249681 (1999 XH117)
Classification: Main-belt Asteroid          SPK-ID: 2249681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2286839037127779 5.9519e-08  
a 3.116694664639158 2.9694e-08 au
q 2.403956762048688 1.8884e-07 au
i 12.35237711739505 6.2439e-06 deg
node 261.9951016874437 3.349e-05 deg
peri 117.7472861092143 3.6637e-05 deg
M 216.0046689779499 1.626e-05 deg
tp 2459404.369817897638
(2021-Jul-08.86981790)
9.8258e-05 TDB
period 2009.739707455061
5.50
2.8721e-05
7.863e-08
d
yr
n .1791276744269879 2.5599e-09 deg/d
Q 3.829432567229627 3.6484e-08 au
  Orbit Determination Parameters
   # obs. used (total)      336  
   data-arc span      7164 days (19.61 yr)  
   first obs. used      1999-10-14  
   last obs. used      2019-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52947  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:18:56  

Additional Information
 Earth MOID = 1.43639 au 
 Jupiter MOID = 1.81589 au 
 T_jup = 3.141 
[ 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 15.0   n/a MPO348681  

249681 (1999 XH117)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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