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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02006544486216405 3.3184e-08  
a 2.750668488819456 1.4843e-08 au
q 2.695475101922957 9.2963e-08 au
i 6.059290705990594 4.2553e-06 deg
node 154.3221614636772 3.5686e-05 deg
peri 96.8035245696538 0.00011485 deg
M 200.0327068228251 0.00010929 deg
tp 2459940.930842047164
(2022-Dec-27.43084205)
0.00050555 TDB
period 1666.310017771888
4.56
1.3488e-05
3.693e-08
d
yr
n .2160462315898306 1.7488e-09 deg/d
Q 2.805861875715955 1.5141e-08 au
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      7128 days (19.52 yr)  
   first obs. used      2001-09-11  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55801  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:46:51  

Additional Information
 Earth MOID = 1.68745 au 
 Jupiter MOID = 2.17944 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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