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173221 (1998 TL31)
Classification: Main-belt Asteroid          SPK-ID: 2173221
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2979136781303561 4.2515e-08  
a 2.612219673161012 1.2555e-08 au
q 1.834003702245138 1.1652e-07 au
i 2.212142157786089 4.7177e-06 deg
node 346.8818874605122 0.00011028 deg
peri 62.68331177415654 0.00011132 deg
M 27.00057727904706 9.5434e-06 deg
tp 2458884.839911701295
(2020-Feb-05.33991170)
4.0704e-05 TDB
period 1542.101539430611
4.22
1.1117e-05
3.044e-08
d
yr
n .233447662683044 1.683e-09 deg/d
Q 3.390435644076887 1.6295e-08 au
  Orbit Determination Parameters
   # obs. used (total)      548  
   data-arc span      7785 days (21.31 yr)  
   first obs. used      1998-10-11  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51966  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:01:00  

Additional Information
 Earth MOID = .845655 au 
 Jupiter MOID = 2.01649 au 
 T_jup = 3.344 
[ 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 MPO502964  

173221 (1998 TL31)          Discovered 1998-Oct-11 by LONEOS at Anderson Mesa
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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