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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2091869484038174 4.2938e-08  
a 2.186307343752936 9.2633e-09 au
q 1.728960382240403 9.7084e-08 au
i 3.771413328799627 3.7611e-06 deg
node 290.5920926663489 7.1186e-05 deg
peri 33.84131666042774 7.1806e-05 deg
M 267.7403781578719 1.3511e-05 deg
tp 2459303.103827294583
(2021-Mar-29.60382729)
4.5665e-05 TDB
period 1180.769828131966
3.23
7.5043e-06
2.055e-08
d
yr
n .3048858392406054 1.9377e-09 deg/d
Q 2.643654305265468 1.1201e-08 au
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      7974 days (21.83 yr)  
   first obs. used      1998-06-28  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57538  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:39:00  

Additional Information
 Earth MOID = .718267 au 
 Jupiter MOID = 2.68433 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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