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JPL Small-Body Database Browser
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85655 (1998 QS18)
Classification: Main-belt Asteroid          SPK-ID: 2085655
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 .2089004309260915 4.7353e-08  
a 2.186736923570284 9.9501e-09 au
q 1.729926637914456 1.0535e-07 au
i 3.771214209044126 4.9415e-06 deg
node 290.5891284734017 7.1557e-05 deg
peri 33.83665134303052 7.2258e-05 deg
M 145.8011956023398 1.3018e-05 deg
tp 2458122.143346833503
(2018-Jan-03.64334683)
4.0731e-05 TDB
period 1181.117853173321
3.23
8.0615e-06
2.207e-08
d
yr
n .3047960023911114 2.0803e-09 deg/d
Q 2.643547209226113 1.2029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      623  
   data-arc span      7506 days (20.55 yr)  
   first obs. used      1998-06-28  
   last obs. used      2019-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58498  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:19:01  

Additional Information
 Earth MOID = .718346 au 
 Jupiter MOID = 2.68161 au 
 T_jup = 3.645 
[ 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 15.8   n/a MPO257391  

85655 (1998 QS18)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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