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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044809727489524 9.6074e-08  
a 3.187859608600684 4.2867e-08 AU
q 2.854788935706989 2.9989e-07 AU
i 20.30209280833353 1.0157e-05 deg
node 70.32619711462993 2.301e-05 deg
peri 301.5233356788152 5.1183e-05 deg
M 79.38580552325422 4.8847e-05 deg
tp 2456542.054659947737
(2013-Sep-06.55465995)
0.00028032 JED
period 2078.965141576472
5.69
4.1934e-05
1.148e-07
d
yr
n .1731630765713624 3.4928e-09 deg/d
Q 3.520930281494378 4.7346e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      549  
   data-arc span      22640 days (61.98 yr)  
   first obs. used      1953-03-17  
   last obs. used      2015-03-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54642  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:55:40  

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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