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85721 (1998 SL63)
Classification: Main-belt Asteroid          SPK-ID: 2085721
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682283733570959 5.0471e-08  
a 2.224440726164738 8.3431e-09 au
q 1.850226681172767 1.1176e-07 au
i 6.752299714940548 4.7765e-06 deg
node 324.5330127323417 3.7898e-05 deg
peri 27.07854480898471 3.9456e-05 deg
M 196.9851450505868 1.2474e-05 deg
tp 2459549.224516645588
(2021-Nov-30.72451665)
4.2944e-05 TDB
period 1211.796471270748
3.32
6.8176e-06
1.867e-08
d
yr
n .297079590950192 1.6714e-09 deg/d
Q 2.598654771156709 9.7467e-09 au
  Orbit Determination Parameters
   # obs. used (total)      748  
   data-arc span      8443 days (23.12 yr)  
   first obs. used      1997-04-10  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:02  

Additional Information
 Earth MOID = .846727 au 
 Jupiter MOID = 2.82466 au 
 T_jup = 3.619 
[ 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 MPO459397  

85721 (1998 SL63)          Discovered 1998-Sep-29 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2194-Aug-30 06:36 < 00:01 Iris 0.0258554836201817 0.0258439909757872 0.0258670349140602 4.51692000592191 4.51691995669779 2522643.774860643 0.94539052337936 2028.85989236771 40.8025482230631 73.5981727822569 90899.236228494 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 21:00:03 2020-Nov-12 21:00

Alternate Designations
 1998 SL63 = 2000 DE40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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