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8681 Burs (1992 EN9)
Classification: Main-belt Asteroid          SPK-ID: 2008681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725409559471996 3.6343e-08  
a 3.048383262488656 1.658e-08 au
q 2.522412300285421 1.145e-07 au
i 2.570549592433905 4.1184e-06 deg
node 151.4112066149674 8.6096e-05 deg
peri 237.7178375962801 8.6857e-05 deg
M 217.8101076676061 1.3305e-05 deg
tp 2459768.336943993537
(2022-Jul-07.83694399)
7.5602e-05 TDB
period 1944.029180298483
5.32
1.586e-05
4.342e-08
d
yr
n .1851824055155006 1.5108e-09 deg/d
Q 3.574354224691892 1.9441e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2023  
   data-arc span      11231 days (30.75 yr)  
   first obs. used      1989-07-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52363  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:01:29  

Additional Information
 Earth MOID = 1.52863 au 
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456356.5 (2013-Mar-05.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173726259544231 3.6304e-08  
q 2.517930742535322 1.1446e-07 au
tp 2455884.559440887102
(2011-Nov-19.05944089)
6.1004e-05 TDB
node 151.4378492435602 8.6134e-05 deg
peri 238.3142750046603 8.6886e-05 deg
i 2.570373009319013 4.1186e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2023  
   data-arc span      11231 days (30.75 yr)  
   first obs. used      1989-07-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52363  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:01:29  

Additional Information
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.317953841510384E-15 -4.12616742483169E-15 -2.8625030557006E-13 -4.368921433975675E-16 -6.796354209049674E-14 -1.504446156973352E-16
q -4.12616742483169E-15 1.310088456877724E-14 1.060871242807442E-12 1.188401783995685E-15 2.502297467993502E-13 6.219536065209746E-16
tp -2.8625030557006E-13 1.060871242807442E-12 3.721434393048518E-9 -6.878630349894165E-12 7.146689492108052E-10 -1.423355595158321E-14
node -4.368921433975675E-16 1.188401783995685E-15 -6.878630349894165E-12 7.41904325513457E-9 -7.412425980110486E-9 3.316411478667863E-11
peri -6.796354209049674E-14 2.502297467993502E-13 7.146689492108052E-10 -7.412425980110486E-9 7.549101183120782E-9 -3.312128611099671E-11
i -1.504446156973352E-16 6.219536065209746E-16 -1.423355595158321E-14 3.316411478667863E-11 -3.312128611099671E-11 1.696272688625066E-11

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 13.0   n/a MPO384834  
diameter diameter 12.610 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.084   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8681 Burs           Discovered 1992 Mar. 2 at the European Southern Observatory in the course of the Uppsala-ESO Survey of Asteroids and Comets.
Burs is a small parish on the Swedish island of Gotland. Gustav Edman (1881-1912), well known for his height (2.46 meters) and strength, was born in Burs. Burs also has the remains of the largest house ( 67 x 11 meters) in Sweden from the Roman Iron Age.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000320/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1992 EN9 = 1990 WR15 = 1997 AS4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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