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85705 (1998 SO21)
Classification: Main-belt Asteroid          SPK-ID: 2085705
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2059235199703833 3.6989e-08  
a 2.211822477854843 7.9748e-09 au
q 1.756356207665359 8.2296e-08 au
i 2.518206036801829 4.9509e-06 deg
node 345.7639121698175 9.9566e-05 deg
peri 313.6511534630897 0.00010034 deg
M 150.0084868275985 1.4059e-05 deg
tp 2458099.846614472661
(2017-Dec-12.34661447)
4.5497e-05 TDB
period 1201.500145768302
3.29
6.4981e-06
1.779e-08
d
yr
n .2996254318136576 1.6205e-09 deg/d
Q 2.667288748044328 9.617e-09 au
  Orbit Determination Parameters
   # obs. used (total)      694  
   data-arc span      8484 days (23.23 yr)  
   first obs. used      1995-11-17  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .585  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:25:45  

Additional Information
 Earth MOID = .741187 au 
 Jupiter MOID = 2.55224 au 
 T_jup = 3.627 
[ 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 16.1   n/a E2004K31  
diameter diameter 4.303 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85705 (1998 SO21)          Discovered 1998-Sep-21 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 SO21 = 2001 OY73 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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