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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2351226090976663 6.7808e-08  
a 2.268760358733398 1.7418e-08 AU
q 1.735323503770644 1.5646e-07 AU
i 2.072476799061526 6.5939e-06 deg
node 39.99457750933393 0.00017976 deg
peri 309.2913386179494 0.00018005 deg
M 343.4718873114721 1.6491e-05 deg
tp 2456857.806268363587
(2014-Jul-19.30626836)
5.7641e-05 JED
period 1248.191913963088
3.42
1.4374e-05
3.935e-08
d
yr
n .2884171864701297 3.3214e-09 deg/d
Q 2.802197213696152 2.1513e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      790  
   data-arc span      14499 days (39.70 yr)  
   first obs. used      1973-10-26  
   last obs. used      2013-07-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54712  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 18:26:12  

Additional Information
 Earth MOID = .728745 AU 
 T_jup = 3.576 
[ 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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