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173207 (1998 ST20)
Classification: Main-belt Asteroid          SPK-ID: 2173207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1476272975736429 4.4473e-08  
a 2.590576202074879 1.4358e-08 au
q 2.208136438203974 1.2163e-07 au
i 2.764572697656487 5.4544e-06 deg
node 166.3071431998647 0.0001111 deg
peri 283.8688112437077 0.0001141 deg
M 356.5005003378334 2.5858e-05 deg
tp 2459015.304591874184
(2020-Jun-14.80459187)
0.00010946 TDB
period 1522.975736310468
4.17
1.2662e-05
3.467e-08
d
yr
n .2363793404037605 1.9652e-09 deg/d
Q 2.973015965945786 1.6478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      9221 days (25.25 yr)  
   first obs. used      1994-10-09  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57661  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:00:40  

Additional Information
 Earth MOID = 1.22664 au 
 Jupiter MOID = 2.2182 au 
 T_jup = 3.403 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO502964  

173207 (1998 ST20)          Discovered 1998-Sep-21 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

Alternate Designations
 1998 ST20 = 2004 BW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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