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129942 (1999 TX171)
Classification: Main-belt Asteroid          SPK-ID: 2129942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06264904974150139 6.2967e-08  
a 2.680358276102381 2.2101e-08 au
q 2.512436377137798 1.7563e-07 au
i 5.767523599724736 6.9524e-06 deg
node 30.90933508878846 4.5261e-05 deg
peri 7.362579604624075 6.3582e-05 deg
M 247.6876247948805 4.8854e-05 deg
tp 2459500.549285740183
(2021-Oct-13.04928574)
0.00022119 TDB
period 1602.830877164641
4.39
1.9825e-05
5.428e-08
d
yr
n .2246026109983787 2.778e-09 deg/d
Q 2.848280175066964 2.3486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      317  
   data-arc span      7153 days (19.58 yr)  
   first obs. used      1999-10-10  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57711  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:07:05  

Additional Information
 Earth MOID = 1.51956 au 
 Jupiter MOID = 2.41373 au 
 T_jup = 3.367 
[ 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 16.2   n/a MPO432777  
diameter diameter 3.078 km 0.651 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129942 (1999 TX171)          Discovered 1999-Oct-10 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

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