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38685 (2000 QP9)
Classification: Main-belt Asteroid          SPK-ID: 2038685
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394756409071376 3.3249e-08  
a 2.606438776719245 9.6083e-09 au
q 2.242904057851113 8.8011e-08 au
i 10.73432653282815 3.8955e-06 deg
node 199.5841421105816 1.9035e-05 deg
peri 171.1356847331878 2.4059e-05 deg
M 252.6974356777791 1.5968e-05 deg
tp 2459458.617961104424
(2021-Sep-01.11796110)
6.9212e-05 TDB
period 1536.985318471456
4.21
8.4988e-06
2.327e-08
d
yr
n .2342247487165477 1.2952e-09 deg/d
Q 2.969973495587378 1.0948e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1716  
   data-arc span      8210 days (22.48 yr)  
   first obs. used      1998-03-26  
   last obs. used      2020-09-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49852  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:24:42  

Additional Information
 Earth MOID = 1.24382 au 
 Jupiter MOID = 2.49821 au 
 T_jup = 3.373 
[ 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 14.0   n/a MPO290743  
diameter diameter 4.034 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.328   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

38685 (2000 QP9)          Discovered 2000-Aug-26 by Kusnirak, P., Pravec, P. at Ondrejov
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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