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91585 (1999 SR20)
Classification: Main-belt Asteroid          SPK-ID: 2091585
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1547373151161108 4.5669e-08  
a 2.751935235374166 1.6805e-08 au
q 2.326108165678945 1.2444e-07 au
i 10.43718509476423 4.0539e-06 deg
node 106.3870945978075 2.6466e-05 deg
peri 321.0071604849443 3.0215e-05 deg
M 147.1741168641488 1.5401e-05 deg
tp 2458318.813524289709
(2018-Jul-19.31352429)
6.9314e-05 TDB
period 1667.461211825931
4.57
1.5274e-05
4.182e-08
d
yr
n .2158970760140123 1.9776e-09 deg/d
Q 3.177762305069387 1.9406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      936  
   data-arc span      7566 days (20.71 yr)  
   first obs. used      1999-09-30  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:40:21  

Additional Information
 Earth MOID = 1.35082 au 
 Jupiter MOID = 2.11682 au 
 T_jup = 3.304 
[ 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 14.7   n/a MPO337940  
diameter diameter 3.054 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.329   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91585 (1999 SR20)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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