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129400 (2321 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2129400
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2281806433423352 6.3461e-08  
a 2.290993326933432 1.1582e-08 au
q 1.768232995700765 1.4589e-07 au
i 2.208523581676653 6.8278e-06 deg
node 174.9057662996121 0.00016049 deg
peri 191.7292042380204 0.00016104 deg
M 164.759275433523 1.3707e-05 deg
tp 2458420.829050822416
(2018-Oct-29.32905082)
4.7192e-05 TDB
period 1266.584483057702
3.47
9.6049e-06
2.63e-08
d
yr
n .2842289676018392 2.1554e-09 deg/d
Q 2.8137536581661 1.4225e-08 au
  Orbit Determination Parameters
   # obs. used (total)      217  
   data-arc span      16917 days (46.32 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5966  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:04:14  

Additional Information
 Earth MOID = .766877 au 
 Jupiter MOID = 2.64748 au 
 T_jup = 3.562 
[ 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 17.5   n/a MPO459608  

129400 (2321 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 2321 T-2 = 2001 XW137 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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