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109903 (2001 SL21)
Classification: Main-belt Asteroid          SPK-ID: 2109903
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01991426091199069 3.3162e-08  
a 2.750962959601468 1.4885e-08 au
q 2.696179565464742 9.2925e-08 au
i 6.059626619424531 4.2537e-06 deg
node 154.3188923869687 3.5658e-05 deg
peri 96.8341341744476 0.00011558 deg
M 242.3347734511142 0.00011005 deg
tp 2459941.217309042385
(2022-Dec-27.71730904)
0.00050925 TDB
period 1666.577603314149
4.56
1.3526e-05
3.703e-08
d
yr
n .2160115432273334 1.7532e-09 deg/d
Q 2.805746353738193 1.5181e-08 au
  Orbit Determination Parameters
   # obs. used (total)      759  
   data-arc span      7175 days (19.64 yr)  
   first obs. used      2001-09-11  
   last obs. used      2021-05-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55798  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 11:00:35  

Additional Information
 Earth MOID = 1.68985 au 
 Jupiter MOID = 2.17841 au 
 T_jup = 3.337 
[ 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 15.21   n/a MPCxxxxx  
diameter diameter 4.829 km 0.305 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109903 (2001 SL21)          Discovered 2001-Sep-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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