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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2350106459900515 5.7092e-08  
a 2.268446960762853 1.1863e-08 AU
q 1.735337775119806 1.2761e-07 AU
i 2.072502831705936 5.9798e-06 deg
node 39.99317643129487 0.00014662 deg
peri 309.29231374 0.00014696 deg
M 41.16482194641392 1.1268e-05 deg
tp 2456857.802911745345
(2014-Jul-19.30291175)
3.8598e-05 JED
period 1247.933292133454
3.42
9.7894e-06
2.68e-08
d
yr
n .288476958078863 2.263e-09 deg/d
Q 2.8015561464059 1.4651e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      871  
   data-arc span      14981 days (41.02 yr)  
   first obs. used      1973-10-26  
   last obs. used      2014-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52836  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:27:04  

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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