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78686 (2002 TA139)
Classification: Main-belt Asteroid          SPK-ID: 2078686
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1065153325292376 5.0792e-08  
a 2.516573386139195 1.4023e-08 au
q 2.248519735080349 1.2962e-07 au
i 8.198140578918052 4.6491e-06 deg
node 340.4412593996555 2.897e-05 deg
peri 315.7672128580169 4.4049e-05 deg
M 230.0521203096538 3.9266e-05 deg
tp 2459526.855933414460
(2021-Nov-08.35593341)
0.00015984 TDB
period 1458.185670137429
3.99
1.2188e-05
3.337e-08
d
yr
n .2468821408497803 2.0636e-09 deg/d
Q 2.784627037198041 1.5517e-08 au
  Orbit Determination Parameters
   # obs. used (total)      941  
   data-arc span      14256 days (39.03 yr)  
   first obs. used      1981-05-28  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52675  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:25:54  

Additional Information
 Earth MOID = 1.24135 au 
 Jupiter MOID = 2.43861 au 
 T_jup = 3.436 
[ 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 15.1   n/a MPO417368  
diameter diameter 2.137 km 0.617 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.322   0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78686 (2002 TA139)          Discovered 2002-Oct-04 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2002 TA139 = 1981 KM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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