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78731 (2002 TT239)
Classification: Main-belt Asteroid          SPK-ID: 2078731
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03674564154973929 4.3814e-08  
a 3.05339617605767 2.6216e-08 au
q 2.941197174662911 1.3762e-07 au
i 10.38481003181156 4.6812e-06 deg
node 223.3913177520006 2.7951e-05 deg
peri 243.6254336345851 8.163e-05 deg
M 34.01127591279088 7.4274e-05 deg
tp 2458816.383128541165
(2019-Nov-28.88312854)
0.00040224 TDB
period 1948.826439064976
5.34
2.5098e-05
6.871e-08
d
yr
n .1847265578830734 2.379e-09 deg/d
Q 3.16559517745243 2.7179e-08 au
  Orbit Determination Parameters
   # obs. used (total)      633  
   data-arc span      8144 days (22.30 yr)  
   first obs. used      1997-12-05  
   last obs. used      2020-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:25:43  

Additional Information
 Earth MOID = 1.97491 au 
 Jupiter MOID = 1.94749 au 
 T_jup = 3.210 
[ 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 14.7   n/a MPO422200  
diameter diameter 7.810 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78731 (2002 TT239)          Discovered 2002-Oct-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2002 TT239 = 2000 HC95 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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