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85656 (1998 QX18)
Classification: Main-belt Asteroid          SPK-ID: 2085656
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1718981688375285 3.72e-08  
a 2.200915537235739 9.729e-09 au
q 1.82258218661885 8.056e-08 au
i 4.302380424021944 5.0924e-06 deg
node 224.4193324038159 5.1205e-05 deg
peri 122.4057200352829 5.3967e-05 deg
M 228.253495716282 2.0315e-05 deg
tp 2459436.955621143786
(2021-Aug-10.45562114)
6.9274e-05 TDB
period 1192.623853407101
3.27
7.9079e-06
2.165e-08
d
yr
n .3018554416562674 2.0015e-09 deg/d
Q 2.579248887852628 1.1401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      688  
   data-arc span      13679 days (37.45 yr)  
   first obs. used      1982-11-14  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54917  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:39:00  

Additional Information
 Earth MOID = .820373 au 
 Jupiter MOID = 2.8452 au 
 T_jup = 3.642 
[ 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 15.9   n/a MPO453287  

85656 (1998 QX18)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 QX18 = 1982 VK5 = 2003 AU67 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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