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85520 (1997 WO2)
Classification: Main-belt Asteroid          SPK-ID: 2085520
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1659185037876081 4.4242e-08  
a 2.334733188389377 9.2031e-09 au
q 1.94735775102854 1.0515e-07 au
i 6.688494537422553 4.09e-06 deg
node 93.48391274724432 4.3276e-05 deg
peri 293.5535900799443 4.5331e-05 deg
M 140.9006472342497 1.45e-05 deg
tp 2458490.506313809758
(2019-Jan-07.00631381)
5.1467e-05 TDB
period 1303.02969242755
3.57
7.7045e-06
2.109e-08
d
yr
n .2762791992324583 1.6336e-09 deg/d
Q 2.722108625750215 1.073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1556  
   data-arc span      8214 days (22.49 yr)  
   first obs. used      1997-11-23  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:43  

Additional Information
 Earth MOID = .963778 au 
 Jupiter MOID = 2.73397 au 
 T_jup = 3.541 
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Orbital Elements at Epoch 2456989.5 (2014-Nov-28.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652492975357619 4.4284e-08  
q 1.949449951453256 1.0525e-07 au
tp 2457184.951646205554
(2015-Jun-11.45164621)
4.9919e-05 TDB
node 93.588451262178 4.33e-05 deg
peri 293.0090369086739 4.5372e-05 deg
i 6.686199273599208 4.0887e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1556  
   data-arc span      8214 days (22.49 yr)  
   first obs. used      1997-11-23  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:43  

Additional Information
 Jupiter MOID = 2.73397 au 
 T_jup = 3.541 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.961108896561921E-15 -4.648946976169881E-15 -5.807172533026536E-13 1.359381492038098E-14 -2.085344621546402E-13 -7.016450112397906E-16
q -4.648946976169881E-15 1.107698824056643E-14 1.426134082691023E-12 -3.249125310112614E-14 5.034192807128154E-13 1.88083212404946E-15
tp -5.807172533026536E-13 1.426134082691023E-12 2.491950796719313E-9 -8.30591821666934E-12 7.029332640012839E-10 1.770596368818074E-12
node 1.359381492038098E-14 -3.249125310112614E-14 -8.30591821666934E-12 1.874907358784473E-9 -1.864064014042746E-9 1.242682581606736E-11
peri -2.085344621546402E-13 5.034192807128154E-13 7.029332640012839E-10 -1.864064014042746E-9 2.058653647351114E-9 -1.189863000501012E-11
i -7.016450112397906E-16 1.88083212404946E-15 1.770596368818074E-12 1.242682581606736E-11 -1.189863000501012E-11 1.671726005194926E-11

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 15.2   n/a MPO359339  
diameter diameter 2.623 km 0.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.282   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85520 (1997 WO2)          Discovered 1997-Nov-23 by Kobayashi, T. at Oizumi
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1997 WO2 = 2002 CZ162 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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