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85544 (1997 WJ50)
Classification: Main-belt Asteroid          SPK-ID: 2085544
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06974410143336034 3.5892e-08  
a 2.725332738610983 1.4002e-08 au
q 2.535256855649641 9.9793e-08 au
i 7.684048921940507 4.3128e-06 deg
node 229.1459872946102 3.0976e-05 deg
peri 191.6640273503617 4.7084e-05 deg
M 81.39604577420307 3.4259e-05 deg
tp 2459024.940360024010
(2020-Jun-24.44036002)
0.0001561 TDB
period 1643.341136772391
4.50
1.2665e-05
3.467e-08
d
yr
n .2190658968758362 1.6883e-09 deg/d
Q 2.915408621572325 1.4979e-08 au
  Orbit Determination Parameters
   # obs. used (total)      907  
   data-arc span      8581 days (23.49 yr)  
   first obs. used      1997-11-02  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:26:25  

Additional Information
 Earth MOID = 1.54763 au 
 Jupiter MOID = 2.3613 au 
 T_jup = 3.340 
[ 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 15.35   n/a MPCxxxxx  
diameter diameter 4.606 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85544 (1997 WJ50)          Discovered 1997-Nov-28 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1997 WJ50 = 2001 QX226 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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