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3711 Ellensburg (1983 QD)
Classification: Main-belt Asteroid          SPK-ID: 2003711
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666058024499941 3.7792e-08  
a 2.655749121378169 9.9575e-09 au
q 2.213285907905093 1.0042e-07 au
i 11.7901507901689 4.3769e-06 deg
node 312.68354767299 1.9823e-05 deg
peri 122.5271934791044 2.3677e-05 deg
M 117.3348766629938 1.2847e-05 deg
tp 2458485.267064384322
(2019-Jan-01.76706438)
5.5618e-05 TDB
period 1580.807532225784
4.33
8.8906e-06
2.434e-08
d
yr
n .2277317084219091 1.2808e-09 deg/d
Q 3.098212334851246 1.1616e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2023  
   data-arc span      13482 days (36.91 yr)  
   first obs. used      1983-08-31  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43253  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:06:53  

Additional Information
 Earth MOID = 1.25352 au 
 Jupiter MOID = 2.18636 au 
 T_jup = 3.338 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO337281  
diameter diameter 6.763 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.293   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3711 Ellensburg (1983 QD)          Discovered 1983-Aug-31 by Gibson, J. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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