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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1051868050267747 9.5624e-08  
a 3.189811010694502 4.1175e-08 au
q 2.85428498184032 2.9851e-07 au
i 20.29604263176442 7.4042e-06 deg
node 70.06452232526233 2.2527e-05 deg
peri 302.6446841357045 4.4368e-05 deg
M 182.1671215678628 4.4654e-05 deg
tp 2458628.410762930193
(2019-May-24.91076293)
0.00026686 JED
period 2080.874346281717
5.70
4.029e-05
1.103e-07
d
yr
n .1730041992411885 3.3497e-09 deg/d
Q 3.525337039548684 4.5506e-08 au
  Orbit Determination Parameters
   # obs. used (total)      686  
   data-arc span      23040 days (63.08 yr)  
   first obs. used      1953-03-17  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55043  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:25:10  

Additional Information
 Earth MOID = 1.90938 au 
 Jupiter MOID = 1.98398 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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