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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1474525164112983 5.2973e-08  
a 2.279232009456802 9.4182e-09 au
q 1.943153514177217 1.1877e-07 au
i 4.556565770973502 6.1838e-06 deg
node 195.7171403722757 4.1709e-05 deg
peri 126.12524060 4.8029e-05 deg
M 237.7714716642077 2.8256e-05 deg
tp 2459823.228168843119
(2022-Aug-31.72816884)
0.00010036 TDB
period 1256.843577151517
3.44
7.7903e-06
2.133e-08
d
yr
n .2864318253635795 1.7754e-09 deg/d
Q 2.615310504736388 1.0807e-08 au
  Orbit Determination Parameters
   # obs. used (total)      617  
   data-arc span      9289 days (25.43 yr)  
   first obs. used      1995-11-23  
   last obs. used      2021-04-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54441  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:26:42  

Additional Information
 Earth MOID = .934376 au 
 Jupiter MOID = 2.68563 au 
 T_jup = 3.588 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.31   n/a MPCxxxxx  

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

Alternate Designations
 1998 QJ20 = 2001 KT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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