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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661161054002681 4.2491e-08  
a 2.334509244528192 9.0428e-09 au
q 1.946709660806246 1.0148e-07 au
i 6.688466788909997 4.052e-06 deg
node 93.48180259074631 4.0925e-05 deg
peri 293.4889263082421 4.2939e-05 deg
M 250.4106629384368 1.4535e-05 deg
tp 2459793.104486671549
(2022-Aug-01.60448667)
5.3646e-05 TDB
period 1302.842220147298
3.57
7.5699e-06
2.073e-08
d
yr
n .2763189543852045 1.6055e-09 deg/d
Q 2.722308828250137 1.0545e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1616  
   data-arc span      8655 days (23.70 yr)  
   first obs. used      1997-11-23  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4519  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:54:03  

Additional Information
 Earth MOID = .962434 au 
 Jupiter MOID = 2.73619 au 
 T_jup = 3.541 
[ 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 15.23   n/a MPO637173  
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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