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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06916011352812826 4.1593e-08  
a 2.724143863944272 1.6072e-08 au
q 2.535741765046932 1.1625e-07 au
i 7.685649354231941 4.8351e-06 deg
node 229.157340824273 3.3438e-05 deg
peri 191.7217278868212 4.9679e-05 deg
M 266.8954863659918 3.6001e-05 deg
tp 2459025.228809873080
(2020-Jun-24.72880987)
0.00016497 TDB
period 1642.26593949424
4.50
1.4534e-05
3.979e-08
d
yr
n .2192093200878704 1.94e-09 deg/d
Q 2.912545962841612 1.7184e-08 au
  Orbit Determination Parameters
   # obs. used (total)      730  
   data-arc span      8022 days (21.96 yr)  
   first obs. used      1997-11-02  
   last obs. used      2019-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51068  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:12:21  

Additional Information
 Earth MOID = 1.54815 au 
 Jupiter MOID = 2.36412 au 
 T_jup = 3.341 
[ 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 15.3   n/a MPO453286  
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

[ show close-approach data ]
Alternate Designations
 1997 WJ50 = 2001 QX226 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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