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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494639153910947 3.968e-08  
a 2.427212309575843 9.0879e-09 au
q 2.064431654301175 9.3022e-08 au
i 5.873674993287987 4.5966e-06 deg
node 328.5361150915061 3.4907e-05 deg
peri 163.1908334698892 3.8138e-05 deg
M 170.2977081031452 1.55e-05 deg
tp 2458743.119185062882
(2019-Sep-16.61918506)
5.8141e-05 TDB
period 1381.211150739016
3.78
7.7573e-06
2.124e-08
d
yr
n .2606408149886295 1.4638e-09 deg/d
Q 2.78999296485051 1.0446e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1491  
   data-arc span      9402 days (25.74 yr)  
   first obs. used      1995-09-17  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54124  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:10  

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 14.98   n/a E2021B10  
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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