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85809 (1998 WU12)
Classification: Main-belt Asteroid          SPK-ID: 2085809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2101871466881946 4.9224e-08  
a 2.755314870204558 2.0527e-08 au
q 2.176183099408708 1.3731e-07 au
i 9.732097069689125 6.148e-06 deg
node 35.63598475248713 2.7139e-05 deg
peri 310.6087109206235 3.0187e-05 deg
M 215.3920589639569 1.6007e-05 deg
tp 2459271.534613684050
(2021-Feb-26.03461368)
7.8496e-05 TDB
period 1670.533853089345
4.57
1.8668e-05
5.111e-08
d
yr
n .2154999728585243 2.4082e-09 deg/d
Q 3.334446641000407 2.4841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      7482 days (20.48 yr)  
   first obs. used      1998-11-11  
   last obs. used      2019-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54682  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:56:03  

Additional Information
 Earth MOID = 1.1839 au 
 Jupiter MOID = 2.14516 au 
 T_jup = 3.291 
[ 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 14.9   n/a MPO436375  
diameter diameter 5.925 km 0.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85809 (1998 WU12)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 WU12 = 2003 YE150 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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