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109517 (2001 QR238)
Classification: Main-belt Asteroid          SPK-ID: 2109517
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392960917331759 3.9534e-08  
a 3.094907263139426 2.1873e-08 au
q 2.663798777107484 1.2414e-07 au
i 10.27452832440313 4.9914e-06 deg
node 350.8137782379148 2.2707e-05 deg
peri 307.1516025643087 2.7956e-05 deg
M 206.9971602532244 1.671e-05 deg
tp 2459845.714381090468
(2022-Sep-23.21438109)
9.4499e-05 TDB
period 1988.702809020778
5.44
2.1083e-05
5.772e-08
d
yr
n .1810225230069752 1.9191e-09 deg/d
Q 3.526015749171367 2.492e-08 au
  Orbit Determination Parameters
   # obs. used (total)      905  
   data-arc span      6812 days (18.65 yr)  
   first obs. used      2001-08-24  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56453  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 19:05:28  

Additional Information
 Earth MOID = 1.66404 au 
 Jupiter MOID = 1.82813 au 
 T_jup = 3.184 
[ 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 14.4   n/a MPO341325  
diameter diameter 5.189 km 0.767 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.137   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109517 (2001 QR238)          Discovered 2001-Aug-24 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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