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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2350106662050018 5.5277e-08  
a 2.26844695324467 1.0661e-08 AU
q 1.735337723511933 1.2235e-07 AU
i 2.072501937943565 5.7688e-06 deg
node 39.99323784742914 0.00011573 deg
peri 309.2922497307 0.00011618 deg
M 41.16482872503637 1.0227e-05 deg
tp 2456857.802888956776
(2014-Jul-19.30288896)
3.5168e-05 JED
period 1247.933285929524
3.42
8.7972e-06
2.409e-08
d
yr
n .2884769595129869 2.0336e-09 deg/d
Q 2.801556182977406 1.3166e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1011  
   data-arc span      15063 days (41.24 yr)  
   first obs. used      1973-10-26  
   last obs. used      2015-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50798  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:46:20  

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 14.7 mag n/a MPO319291  

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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