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85522 (1997 WT4)
Classification: Main-belt Asteroid          SPK-ID: 2085522
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1876306233651611 7.1563e-08  
a 2.420666802852982 1.3594e-08 au
q 1.966475581674325 1.7085e-07 au
i 3.548340360679377 6.401e-06 deg
node 41.50321422711326 7.6386e-05 deg
peri 335.4586567153889 7.7482e-05 deg
M 269.5706041331269 1.3827e-05 deg
tp 2458946.047756001237
(2020-Apr-06.54775600)
5.4467e-05 TDB
period 1375.627814030498
3.77
1.1588e-05
3.173e-08
d
yr
n .2616986922830704 2.2044e-09 deg/d
Q 2.874858024031639 1.6144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      415  
   data-arc span      7479 days (20.48 yr)  
   first obs. used      1997-10-29  
   last obs. used      2018-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59934  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 03:05:59  

Additional Information
 Earth MOID = .968097 au 
 Jupiter MOID = 2.5837 au 
 T_jup = 3.487 
[ 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 16.3   n/a MPO439614  
diameter diameter 3.091 km 0.429 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85522 (1997 WT4)          Discovered 1997-Nov-20 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1997 WT4 = 2001 YH45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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