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129389 (1285 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2129389
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1894926303444528 4.8028e-08  
a 2.151723841069233 9.5046e-09 au
q 1.743988030650155 1.0765e-07 au
i 2.415860317202403 4.6648e-06 deg
node 183.0785107214098 7.2507e-05 deg
peri 179.934041845389 7.3151e-05 deg
M 285.3972593219727 8.9635e-06 deg
tp 2459239.407897505496
(2021-Jan-24.90789751)
2.937e-05 TDB
period 1152.864389703448
3.16
7.6387e-06
2.091e-08
d
yr
n .3122656950941151 2.069e-09 deg/d
Q 2.559459651488311 1.1306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      813  
   data-arc span      16633 days (45.54 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5644  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:51:37  

Additional Information
 Earth MOID = .741484 au 
 Jupiter MOID = 2.89708 au 
 T_jup = 3.680 
[ 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 16.3   n/a MPO432773  

129389 (1285 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

Alternate Designations
 1285 T-2 = 2003 BM21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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