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JPL Small-Body Database Browser
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85657 (1998 QJ20)
Classification: Main-belt Asteroid          SPK-ID: 2085657
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472294405515072 5.3656e-08  
a 2.278979097627096 9.9144e-09 au
q 1.94344628005488 1.2078e-07 au
i 4.556297203255156 8.0488e-06 deg
node 195.7373660634681 4.6976e-05 deg
peri 125.9268076292426 5.4157e-05 deg
M 9.992865083514262 2.9267e-05 deg
tp 2458565.618394751422
(2019-Mar-23.11839475)
0.00010205 TDB
period 1256.634387089305
3.44
8.2003e-06
2.245e-08
d
yr
n .2864795072446287 1.8694e-09 deg/d
Q 2.614511915199312 1.1374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      476  
   data-arc span      8741 days (23.93 yr)  
   first obs. used      1995-11-23  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57263  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:13:10  

Additional Information
 Earth MOID = .934469 au 
 Jupiter MOID = 2.6849 au 
 T_jup = 3.588 
[ 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 16.2   n/a MPO432400  

85657 (1998 QJ20)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 QJ20 = 2001 KT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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