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129398 (2109 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2129398
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1997736214218616 6.5238e-08  
a 2.318279191803962 1.0999e-08 au
q 1.855148162190338 1.4767e-07 au
i 5.69725790776501 8.6227e-06 deg
node 356.7164593270968 5.9504e-05 deg
peri 316.2167093178849 6.5251e-05 deg
M 117.3629794064926 2.9909e-05 deg
tp 2458580.184256032803
(2019-Apr-06.68425603)
0.00010581 TDB
period 1289.279367253521
3.53
9.1752e-06
2.512e-08
d
yr
n .2792257513333884 1.9871e-09 deg/d
Q 2.781410221417586 1.3196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      456  
   data-arc span      16929 days (46.35 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55243  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:04:14  

Additional Information
 Earth MOID = .846476 au 
 Jupiter MOID = 2.51692 au 
 T_jup = 3.546 
[ 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 16.5   n/a MPO502831  

129398 (2109 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
 2109 T-2 = 2001 RV147 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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