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173726 (2001 QJ209)
Classification: Main-belt Asteroid          SPK-ID: 2173726
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 .04397583727212737 9.024e-08  
a 2.919442165791581 3.3105e-08 au
q 2.791057252183344 2.7086e-07 au
i 11.04774805654617 1.0106e-05 deg
node 317.5269147288452 3.0109e-05 deg
peri 2.524608839793962 7.4227e-05 deg
M 283.3478325928173 6.8213e-05 deg
tp 2459388.445018839430
(2021-Jun-22.94501884)
0.00034675 TDB
period 1821.999449021557
4.99
3.0991e-05
8.485e-08
d
yr
n .1975851311005202 3.3608e-09 deg/d
Q 3.047827079399819 3.4561e-08 au
  Orbit Determination Parameters
   # obs. used (total)      240  
   data-arc span      6740 days (18.45 yr)  
   first obs. used      2001-08-11  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65947  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:08:27  

Additional Information
 Earth MOID = 1.77791 au 
 Jupiter MOID = 2.215 au 
 T_jup = 3.251 
[ 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 15.6   n/a MPO433116  
diameter diameter 4.628 km 0.510 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.063   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

173726 (2001 QJ209)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 2001 QJ209 = 2004 CZ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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