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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 | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02029412790627038 3.3426e-08  
a 2.750035104796292 1.5352e-08 au
q 2.694225540632822 9.3202e-08 au
i 6.059276480530745 4.3929e-06 deg
node 154.3273384850508 3.603e-05 deg
peri 96.63831113151238 0.00011794 deg
M 156.9817612515893 0.00011205 deg
tp 2458274.139063290589
(2018-Jun-04.63906329)
0.00051926 TDB
period 1665.734510369693
4.56
1.3948e-05
3.819e-08
d
yr
n .2161208750607573 1.8097e-09 deg/d
Q 2.805844668959761 1.5663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      6651 days (18.21 yr)  
   first obs. used      2001-09-11  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57713  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:09:05  

Additional Information
 Earth MOID = 1.68794 au 
 Jupiter MOID = 2.1807 au 
 T_jup = 3.338 
[ 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 15.2   n/a MPO449654  
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

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