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JPL Small-Body Database Browser
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185720 (1998 SG89)
Classification: Main-belt Asteroid          SPK-ID: 2185720
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1795520907546782 6.4547e-08  
a 2.334777633590113 1.6238e-08 au
q 1.915563428031748 1.4666e-07 au
i 1.894224596940846 5.6695e-06 deg
node 290.2135365895539 0.00023997 deg
peri 34.87275907995532 0.000241 deg
M 51.92699497841839 2.6939e-05 deg
tp 2458812.543476693695
(2019-Nov-25.04347669)
9.609e-05 TDB
period 1303.066900335598
3.57
1.3594e-05
3.722e-08
d
yr
n .2762713103274159 2.8821e-09 deg/d
Q 2.753991839148477 1.9153e-08 au
  Orbit Determination Parameters
   # obs. used (total)      195  
   data-arc span      7120 days (19.49 yr)  
   first obs. used      1998-09-18  
   last obs. used      2018-03-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62007  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:29:27  

Additional Information
 Earth MOID = .903913 au 
 Jupiter MOID = 2.56888 au 
 T_jup = 3.546 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.3   n/a MPO436917  

185720 (1998 SG89)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1998 SG89 = 2005 QO89 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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