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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661161045408893 4.3342e-08  
a 2.334509244287499 9.0778e-09 au
q 1.946709662611765 1.033e-07 au
i 6.688466817755288 4.0555e-06 deg
node 93.48179938393255 4.2143e-05 deg
peri 293.4889294541152 4.4149e-05 deg
M 250.410663204582 1.4599e-05 deg
tp 2459793.104485647032
(2022-Aug-01.60448565)
5.3857e-05 TDB
period 1302.84221994581
3.57
7.5992e-06
2.081e-08
d
yr
n .2763189544279381 1.6117e-09 deg/d
Q 2.722308825963234 1.0586e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1593  
   data-arc span      8608 days (23.57 yr)  
   first obs. used      1997-11-23  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45139  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 08:51:16  

Additional Information
 Earth MOID = .962434 au 
 Jupiter MOID = 2.73619 au 
 T_jup = 3.541 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457081.5 (2015-Feb-28.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652045998088276 4.3331e-08  
q 1.949462360048953 1.0321e-07 au
tp 2457184.965705366497
(2015-Jun-11.46570537)
4.9275e-05 TDB
node 93.58726008351677 4.2164e-05 deg
peri 293.0141618764033 4.4198e-05 deg
i 6.68611037425034 4.054e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1593  
   data-arc span      8608 days (23.57 yr)  
   first obs. used      1997-11-23  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45139  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 08:51:16  

Additional Information
 Jupiter MOID = 2.73619 au 
 T_jup = 3.541 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.87755538868753E-15 -4.460808440421629E-15 -5.149782796516686E-13 1.309486386719828E-14 -1.827164437277549E-13 -7.057514294614974E-16
q -4.460808440421629E-15 1.065321952193766E-14 1.278247425983275E-12 -3.14230733570817E-14 4.453966430528002E-13 1.88974639113451E-15
tp -5.149782796516686E-13 1.278247425983275E-12 2.4280737696152E-9 -6.919542560663242E-12 6.784199950233396E-10 1.834535094923289E-12
node 1.309486386719828E-14 -3.14230733570817E-14 -6.919542560663242E-12 1.777816269228565E-9 -1.767206191430044E-9 8.005106363679604E-12
peri -1.827164437277549E-13 4.453966430528002E-13 6.784199950233396E-10 -1.767206191430044E-9 1.953504137240338E-9 -7.489387841049035E-12
i -7.057514294614974E-16 1.88974639113451E-15 1.834535094923289E-12 8.005106363679604E-12 -7.489387841049035E-12 1.643509512782431E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.22   n/a E2021B10  
diameter diameter 2.623 km 0.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.66793 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

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