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8683 Sjolander (1992 EE13)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008683
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1553997687884704 3.2665e-08  
a 3.207108841438702 1.7661e-08 au
q 2.708724868999668 1.037e-07 au
i 8.096917561979476 4.6034e-06 deg
node 183.1782283217763 2.8659e-05 deg
peri 296.7901679262586 3.2899e-05 deg
M 36.18054960092407 1.5404e-05 deg
tp 2458989.665521308733
(2020-May-20.16552131)
8.9556e-05 TDB
period 2097.823641875178
5.74
1.7329e-05
4.744e-08
d
yr
n .1716064176291804 1.4175e-09 deg/d
Q 3.705492813877735 2.0406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1595  
   data-arc span      11086 days (30.35 yr)  
   first obs. used      1990-11-15  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51259  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:03:10  

Additional Information
 Earth MOID = 1.73642 au 
 Jupiter MOID = 1.45459 au 
 T_jup = 3.158 
[ show covariance matrix ]

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 13.73   n/a MPCxxxxx  
diameter diameter 8.659 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8683 Sjölander           Discovered 1992 Mar. 2 at the European Southern Observatory in the course of the Uppsala-ESO Survey of Asteroids and Comets.
Nils Göran Sjölander (b. 1951), formerly librarian at Uppsala Observatory, studies dwarf galaxies and has a keen interest in the history of astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1992 EE13 = 1990 WX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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