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90643 (5166 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2090643
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1132646558993537 6.5075e-08  
a 3.005973018389042 2.9162e-08 au
q 2.665502518818465 1.9243e-07 au
i 9.734783668367673 7.0935e-06 deg
node 321.9694058077569 3.8097e-05 deg
peri 346.2058687952432 4.8614e-05 deg
M 29.45448630187012 3.2619e-05 deg
tp 2458844.751097145388
(2019-Dec-27.25109715)
0.00017168 TDB
period 1903.601524501899
5.21
2.7702e-05
7.584e-08
d
yr
n .1891152089165291 2.7521e-09 deg/d
Q 3.346443517959619 3.2466e-08 au
  Orbit Determination Parameters
   # obs. used (total)      443  
   data-arc span      17114 days (46.86 yr)  
   first obs. used      1973-09-20  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .563  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:13:19  

Additional Information
 Earth MOID = 1.6522 au 
 Jupiter MOID = 1.93501 au 
 T_jup = 3.220 
[ 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 14.9   n/a MPO359376  

90643 (5166 T-2)          Discovered 1973-Sep-25 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 5166 T-2 = 2002 EQ57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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