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85545 (1997 WL55)
Classification: Main-belt Asteroid          SPK-ID: 2085545
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1662321783797087 5.0929e-08  
a 3.123705049377361 2.0915e-08 au
q 2.604444754403666 1.6138e-07 au
i 18.82590917861324 5.474e-06 deg
node 60.88050230496862 1.1426e-05 deg
peri 338.659961334958 1.7326e-05 deg
M 45.95029180030211 1.1091e-05 deg
tp 2458743.111446514010
(2019-Sep-16.61144651)
6.2426e-05 TDB
period 2016.524283624839
5.52
2.0253e-05
5.545e-08
d
yr
n .1785250011236541 1.793e-09 deg/d
Q 3.642965344351055 2.4392e-08 au
  Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      8332 days (22.81 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:09:41  

Additional Information
 Earth MOID = 1.62209 au 
 Jupiter MOID = 1.7729 au 
 T_jup = 3.112 
[ 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 14.2   n/a MPO320051  
diameter diameter 7.807 km 0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85545 (1997 WL55)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1997 WL55 = 2002 WA13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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