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441850 (2009 WJ23)
Classification: Main-belt Asteroid          SPK-ID: 2441850
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1708200965708984 5.9002e-08  
a 2.24987585668012 1.8846e-08 au
q 1.86555184556949 1.375e-07 au
i 3.9257582796943 5.8998e-06 deg
node 17.91414944048972 8.436e-05 deg
peri 37.81920082250392 8.8641e-05 deg
M 53.25814177850865 1.9806e-05 deg
tp 2458818.144121248559
(2019-Nov-30.64412125)
6.8675e-05 TDB
period 1232.640008799739
3.37
1.5488e-05
4.24e-08
d
yr
n .2920560726813852 3.6697e-09 deg/d
Q 2.634199867790751 2.2066e-08 au
  Orbit Determination Parameters
   # obs. used (total)      141  
   data-arc span      4733 days (12.96 yr)  
   first obs. used      2007-02-08  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46923  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:37:56  

Additional Information
 Earth MOID = .87884 au 
 Jupiter MOID = 2.71397 au 
 T_jup = 3.605 
[ 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 17.9   n/a MPO503571  
diameter diameter 1.530 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

441850 (2009 WJ23)          Discovered 2009-Nov-18 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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