Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]
Orbit Diagram
[ switch to new HTML5 viewer ]

Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725409549410074 3.6814e-08  
a 3.048383261946031 1.6806e-08 au
q 2.52241230290368 1.1556e-07 au
i 2.570548629896092 4.3743e-06 deg
node 151.4112095459012 8.6152e-05 deg
peri 237.7178354176965 8.6983e-05 deg
M 217.8101072442639 1.3438e-05 deg
tp 2459768.336946074602
(2022-Jul-07.83694607)
7.6156e-05 TDB
period 1944.029179779415
5.32
1.6076e-05
4.401e-08
d
yr
n .1851824055649455 1.5314e-09 deg/d
Q 3.574354220988382 1.9706e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1952  
   data-arc span      11141 days (30.50 yr)  
   first obs. used      1989-07-29  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52981  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:00:52  

Additional Information
 Earth MOID = 1.52863 au 
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456190.5 (2012-Sep-20.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1738635008138068 3.6722e-08  
q 2.518531709914126 1.1557e-07 au
tp 2455885.020918384520
(2011-Nov-19.52091838)
6.2758e-05 TDB
node 151.4426639272465 8.6204e-05 deg
peri 238.4272523689089 8.7024e-05 deg
i 2.570022657586589 4.3736e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1952  
   data-arc span      11141 days (30.50 yr)  
   first obs. used      1989-07-29  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52981  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:00:52  

Additional Information
 Jupiter MOID = 1.87271 au 
 T_jup = 3.213 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.348533644874033E-15 -4.213278956363193E-15 -3.729647660667141E-13 -3.401797301511391E-16 -8.86654419981789E-14 -2.309559554973612E-16
q -4.213278956363193E-15 1.335615495161601E-14 1.292621384973349E-12 1.167567626773622E-16 3.058979129865123E-13 8.548123372582886E-16
tp -3.729647660667141E-13 1.292621384973349E-12 3.93857357445476E-9 -6.892832102294241E-12 7.657460287722333E-10 -1.59037908506099E-13
node -3.401797301511391E-16 1.167567626773622E-16 -6.892832102294241E-12 7.4310877434242E-9 -7.424494267877546E-9 2.879938595869512E-11
peri -8.86654419981789E-14 3.058979129865123E-13 7.657460287722333E-10 -7.424494267877546E-9 7.573192746269121E-9 -2.879208433405114E-11
i -2.309559554973612E-16 8.548123372582886E-16 -1.59037908506099E-13 2.879938595869512E-11 -2.879208433405114E-11 1.912860666916187E-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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-10 13:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin