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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044809555920475 1.0235e-07  
a 3.187859614880489 4.4648e-08 AU
q 2.854788996024479 3.2439e-07 AU
i 20.30208696593132 1.1108e-05 deg
node 70.32620906832045 2.4874e-05 deg
peri 301.5233201127778 5.2491e-05 deg
M 79.38580847361122 4.8992e-05 deg
tp 2456542.054641555065
(2013-Sep-06.55464156)
0.00028138 JED
period 2078.965147719543
5.69
4.3676e-05
1.196e-07
d
yr
n .1731630760596881 3.6379e-09 deg/d
Q 3.5209302337365 4.9313e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      520  
   data-arc span      22568 days (61.79 yr)  
   first obs. used      1953-03-17  
   last obs. used      2014-12-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54934  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:31:41  

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 (413)
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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