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49917 (1999 XG172)
Classification: Main-belt Asteroid          SPK-ID: 2049917
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0957991793797818 5.3183e-08  
a 2.318929940498744 1.1308e-08 au
q 2.096778355159759 1.2362e-07 au
i 5.832566275250843 4.8371e-06 deg
node 302.8346271266813 5.3894e-05 deg
peri 92.00048561709191 5.9856e-05 deg
M 339.2881899292105 2.6967e-05 deg
tp 2459074.707093704529
(2020-Aug-13.20709370)
9.6788e-05 TDB
period 1289.822262869567
3.53
9.4346e-06
2.583e-08
d
yr
n .2791082231741607 2.0416e-09 deg/d
Q 2.54108152583773 1.2391e-08 au
  Orbit Determination Parameters
   # obs. used (total)      703  
   data-arc span      8148 days (22.31 yr)  
   first obs. used      1998-07-26  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57766  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:28:54  

Additional Information
 Earth MOID = 1.11285 au 
 Jupiter MOID = 2.79968 au 
 T_jup = 3.566 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO400486  

49917 (1999 XG172)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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