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16489 (1990 SG)
Classification: Main-belt Asteroid          SPK-ID: 2016489
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 .1044809688083592 9.5339e-08  
a 3.187859609872614 4.2677e-08 AU
q 2.854788949408086 2.9701e-07 AU
i 20.30209296612886 9.9701e-06 deg
node 70.32619689597257 2.2868e-05 deg
peri 301.5233348879904 5.1028e-05 deg
M 79.38580621399566 4.8801e-05 deg
tp 2456542.054655684398
(2013-Sep-06.55465568)
0.00028002 JED
period 2078.965142820708
5.69
4.1748e-05
1.143e-07
d
yr
n .1731630764677264 3.4773e-09 deg/d
Q 3.520930270337143 4.7136e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      553  
   data-arc span      22661 days (62.04 yr)  
   first obs. used      1953-03-17  
   last obs. used      2015-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54459  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:26:32  

Additional Information
 Earth MOID = 1.91254 AU 
 T_jup = 3.092 
[ 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 13.0 mag n/a MPO319291  

16489 (1990 SG)          Discovered 1990-Sep-17 by McNaught, R. H. at Siding Spring
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 SG = 2000 JO56 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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