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21793 (1999 SG8)
Classification: Main-belt Asteroid          SPK-ID: 2021793
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1478197013443431 4.7184e-08  
a 3.0517625547074 1.9305e-08 au
q 2.600651925296702 1.5315e-07 au
i 10.02258590906073 4.0312e-06 deg
node 103.9665491039243 2.2187e-05 deg
peri 272.4468665713865 2.5958e-05 deg
M 9.250127085918177 1.477e-05 deg
tp 2459346.465480271615
(2021-May-11.96548027)
7.9673e-05 TDB
period 1947.262662978933
5.33
1.8477e-05
5.059e-08
d
yr
n .1848749050881867 1.7542e-09 deg/d
Q 3.502873184118097 2.2159e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1274  
   data-arc span      9049 days (24.77 yr)  
   first obs. used      1996-01-12  
   last obs. used      2020-10-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:32  

Additional Information
 Earth MOID = 1.62588 au 
 Jupiter MOID = 2.06691 au 
 T_jup = 3.197 
[ 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 13.91   n/a E2021B10  
diameter diameter 10.942 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21793 (1999 SG8)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SG8 = 2000 WS60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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