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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1547372642285663 4.5719e-08  
a 2.751935236053297 1.8095e-08 au
q 2.326108306292217 1.2452e-07 au
i 10.43716938973981 5.0127e-06 deg
node 106.3870862564552 2.7785e-05 deg
peri 321.0071448077291 3.3418e-05 deg
M 147.1741373392692 1.74e-05 deg
tp 2458318.813429199952
(2018-Jul-19.31342920)
8.0016e-05 TDB
period 1667.461212443183
4.57
1.6447e-05
4.503e-08
d
yr
n .2158970759340926 2.1294e-09 deg/d
Q 3.177762165814378 2.0895e-08 au
  Orbit Determination Parameters
   # obs. used (total)      823  
   data-arc span      7126 days (19.51 yr)  
   first obs. used      1999-09-30  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5519  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:22:59  

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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