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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725409177021607 3.7146e-08  
a 3.048383258557068 1.7028e-08 au
q 2.522412413617728 1.1667e-07 au
i 2.570551951999943 4.4367e-06 deg
node 151.4112426975359 8.6789e-05 deg
peri 237.7177922769937 8.7641e-05 deg
M 217.8101152536807 1.3552e-05 deg
tp 2459768.336901542667
(2022-Jul-07.83690154)
7.6788e-05 TDB
period 1944.029176537577
5.32
1.6289e-05
4.46e-08
d
yr
n .1851824058737533 1.5516e-09 deg/d
Q 3.574354103496407 1.9966e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1926  
   data-arc span      10878 days (29.78 yr)  
   first obs. used      1989-07-29  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51756  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:36:49  

Additional Information
 Earth MOID = 1.52863 au 
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
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Orbital Elements at Epoch 2456134.5 (2012-Jul-26.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173935561775141 3.7033e-08  
q 2.518805946565856 1.167e-07 au
tp 2455885.227717342837
(2011-Nov-19.72771734)
6.3424e-05 TDB
node 151.4476803316324 8.6847e-05 deg
peri 238.4771315583575 8.7689e-05 deg
i 2.569858255375094 4.4357e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1926  
   data-arc span      10878 days (29.78 yr)  
   first obs. used      1989-07-29  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51756  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:36:49  

Additional Information
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.371410688094609E-15 -4.290115088995524E-15 -3.919899842110952E-13 -2.768245639100996E-16 -9.408228385259231E-14 -2.362057453129565E-16
q -4.290115088995524E-15 1.361838791635177E-14 1.348917648115972E-12 -3.149407711921788E-16 3.223989414068475E-13 8.49811672677412E-16
tp -3.919899842110952E-13 1.348917648115972E-12 4.022644656435301E-9 -7.491920119971062E-12 7.862227485061639E-10 -1.820354974901829E-13
node -2.768245639100996E-16 -3.149407711921788E-16 -7.491920119971062E-12 7.542440613358049E-9 -7.535863134293409E-9 2.633335856700899E-11
peri -9.408228385259231E-14 3.223989414068475E-13 7.862227485061639E-10 -7.535863134293409E-9 7.689321320514581E-9 -2.633396488369664E-11
i -2.362057453129565E-16 8.49811672677412E-16 -1.820354974901829E-13 2.633335856700899E-11 -2.633396488369664E-11 1.967515849950387E-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

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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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