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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .165918507062492 4.4439e-08  
a 2.33473318758096 9.2672e-09 au
q 1.947357742708274 1.0569e-07 au
i 6.68849376513688 4.1452e-06 deg
node 93.48391416252289 4.3291e-05 deg
peri 293.5535894835235 4.5362e-05 deg
M 140.900646980737 1.4508e-05 deg
tp 2458490.506314992237
(2019-Jan-07.00631499)
5.1507e-05 TDB
period 1303.029691750776
3.57
7.7581e-06
2.124e-08
d
yr
n .2762791993759537 1.6449e-09 deg/d
Q 2.722108632453645 1.0805e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1549  
   data-arc span      8193 days (22.43 yr)  
   first obs. used      1997-11-23  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:37:21  

Additional Information
 Earth MOID = .963778 au 
 Jupiter MOID = 2.73397 au 
 T_jup = 3.541 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456937.5 (2014-Oct-07.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652678067698917 4.4474e-08  
q 1.949410412153527 1.0578e-07 au
tp 2457184.954247134638
(2015-Jun-11.45424713)
5.0002e-05 TDB
node 93.58888695169929 4.3314e-05 deg
peri 293.0113865330917 4.5402e-05 deg
i 6.686273300180365 4.1438e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1549  
   data-arc span      8193 days (22.43 yr)  
   first obs. used      1997-11-23  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:37:21  

Additional Information
 Jupiter MOID = 2.73397 au 
 T_jup = 3.541 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.977974552430344E-15 -4.6923247850524E-15 -5.683789595092968E-13 1.3939138980888E-14 -2.037581499811951E-13 -8.07206796925501E-16
q -4.6923247850524E-15 1.118840029973902E-14 1.394756263677339E-12 -3.332637173366534E-14 4.912510718068002E-13 2.134760235330758E-15
tp -5.683789595092968E-13 1.394756263677339E-12 2.500232964635226E-9 -8.478595734372325E-12 7.066009870033465E-10 1.940074282731777E-12
node 1.3939138980888E-14 -3.332637173366534E-14 -8.478595734372325E-12 1.876101703717265E-9 -1.865287423830902E-9 1.167187080106249E-11
peri -2.037581499811951E-13 4.912510718068002E-13 7.066009870033465E-10 -1.865287423830902E-9 2.061371485228117E-9 -1.10986239769147E-11
i -8.07206796925501E-16 2.134760235330758E-15 1.940074282731777E-12 1.167187080106249E-11 -1.10986239769147E-11 1.717134832245914E-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

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