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78722 (2002 TR221)
Classification: Main-belt Asteroid          SPK-ID: 2078722
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1662550006791785 4.5659e-08  
a 3.139500230632444 2.2115e-08 au
q 2.617542617656366 1.5037e-07 au
i 13.89785288097017 5.2879e-06 deg
node 61.55883016975989 1.8078e-05 deg
peri 27.19674229057723 2.6457e-05 deg
M 7.700245502305854 1.6998e-05 deg
tp 2458957.039844409435
(2020-Apr-17.53984441)
9.5791e-05 TDB
period 2031.83859630427
5.56
2.1469e-05
5.878e-08
d
yr
n .1771794278614489 1.8721e-09 deg/d
Q 3.661457843608523 2.5792e-08 au
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      8341 days (22.84 yr)  
   first obs. used      1997-12-06  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:25:46  

Additional Information
 Earth MOID = 1.6415 au 
 Jupiter MOID = 1.67447 au 
 T_jup = 3.144 
[ 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 14.3   n/a MPO502631  
diameter diameter 6.505 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.105   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78722 (2002 TR221)          Discovered 2002-Oct-06 by NEAT at Haleakala
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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