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16490 (1990 ST2)
Classification: Main-belt Asteroid          SPK-ID: 2016490
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2350106485540579 5.8324e-08  
a 2.268446959651863 1.2952e-08 AU
q 1.735337768453598 1.3133e-07 AU
i 2.072502582884788 5.9914e-06 deg
node 39.99323687529316 0.00015771 deg
peri 309.29225291 0.00015801 deg
M 41.16482301866383 1.2287e-05 deg
tp 2456857.802908133241
(2014-Jul-19.30290813)
4.1975e-05 JED
period 1247.933291216677
3.42
1.0688e-05
2.926e-08
d
yr
n .2884769582907887 2.4707e-09 deg/d
Q 2.801556150850129 1.5996e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      842  
   data-arc span      14951 days (40.93 yr)  
   first obs. used      1973-10-26  
   last obs. used      2014-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5346  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:32:38  

Additional Information
 Earth MOID = .730404 AU 
 T_jup = 3.577 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6 mag n/a MPO266043  

16490 (1990 ST2)          Discovered 1990-Sep-18 by Holt, H. E. at Palomar (675)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 ST2 = 1973 UM1 = 1990 SY28 = 1997 WN7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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