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21852 Bolander (1999 TR143)
Classification: Main-belt Asteroid          SPK-ID: 2021852
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494639186678929 3.95e-08  
a 2.427212309928509 9.0203e-09 au
q 2.064431646647646 9.2481e-08 au
i 5.87367404523106 4.4694e-06 deg
node 328.5361053993217 3.3273e-05 deg
peri 163.190844130375 3.627e-05 deg
M 170.2977070038236 1.4963e-05 deg
tp 2458743.119189138246
(2019-Sep-16.61918914)
5.591e-05 TDB
period 1381.211151040045
3.78
7.6995e-06
2.108e-08
d
yr
n .2606408149318241 1.4529e-09 deg/d
Q 2.789992973209371 1.0368e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1558  
   data-arc span      9458 days (25.89 yr)  
   first obs. used      1995-09-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53657  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:02  

Additional Information
 Earth MOID = 1.08017 au 
 Jupiter MOID = 2.2496 au 
 T_jup = 3.487 
[ 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 14.99   n/a MPO636391  
diameter diameter 5.927 km 0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21852 Bolander           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
John Anthony Bolander (b. 1991) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his physical science project. He attends the Our Lady of Perpetual Help School, New Albany, Indiana.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

Alternate Designations
 1999 TR143 = 1997 EK36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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