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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2061646658932379 3.5392e-08  
a 2.211300426656878 7.4059e-09 au
q 1.755408413005588 7.944e-08 au
i 2.518757631592261 4.9021e-06 deg
node 345.7567248520804 8.0353e-05 deg
peri 313.7090385648731 8.1225e-05 deg
M 269.8201488356913 1.4379e-05 deg
tp 2459301.368738341140
(2021-Mar-27.86873834)
4.8966e-05 TDB
period 1201.07479003778
3.29
6.0338e-06
1.652e-08
d
yr
n .2997315429363697 1.5058e-09 deg/d
Q 2.667192440308168 8.9327e-09 au
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      8919 days (24.42 yr)  
   first obs. used      1995-11-17  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57764  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:39:50  

Additional Information
 Earth MOID = .740983 au 
 Jupiter MOID = 2.5544 au 
 T_jup = 3.628 
[ 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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