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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725409565045577 3.5731e-08  
a 3.048383262740012 1.6298e-08 au
q 2.522412298794366 1.1312e-07 au
i 2.570550865171311 3.692e-06 deg
node 151.4112064293218 8.6082e-05 deg
peri 237.7178374011659 8.6755e-05 deg
M 217.8101078834729 1.3131e-05 deg
tp 2459768.336942922808
(2022-Jul-07.83694292)
7.4878e-05 TDB
period 1944.029180538927
5.32
1.559e-05
4.268e-08
d
yr
n .1851824054925967 1.4851e-09 deg/d
Q 3.574354226685658 1.911e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2165  
   data-arc span      11282 days (30.89 yr)  
   first obs. used      1989-07-29  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51272  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:50:52  

Additional Information
 Earth MOID = 1.52863 au 
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456619.5 (2013-Nov-23.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1735985779869826 3.5715e-08  
q 2.518013144679036 1.1303e-07 au
tp 2455884.213067843467
(2011-Nov-18.71306784)
5.8757e-05 TDB
node 151.4374970354193 8.6117e-05 deg
peri 238.2551010394033 8.6782e-05 deg
i 2.570488127560197 3.6923e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2165  
   data-arc span      11282 days (30.89 yr)  
   first obs. used      1989-07-29  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51272  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:50:52  

Additional Information
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.275561654123789E-15 -4.009518486849329E-15 -1.782745724644352E-13 -5.221901995514194E-16 -4.2158757605534E-14 4.294214986384532E-17
q -4.009518486849329E-15 1.277512734628312E-14 7.792598256995093E-13 2.09264987605483E-15 1.824245976332455E-13 2.032366962972244E-17
tp -1.782745724644352E-13 7.792598256995093E-13 3.452389780261452E-9 -6.8433702852259E-12 6.508971132610743E-10 1.578831544076371E-13
node -5.221901995514194E-16 2.09264987605483E-15 -6.8433702852259E-12 7.416115821485562E-9 -7.409464960555653E-9 3.370077195634292E-11
peri -4.2158757605534E-14 1.824245976332455E-13 6.508971132610743E-10 -7.409464960555653E-9 7.531037869918373E-9 -3.362618520324548E-11
i 4.294214986384532E-17 2.032366962972244E-17 1.578831544076371E-13 3.370077195634292E-11 -3.362618520324548E-11 1.363313734174681E-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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