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21109 Sunkel (1992 RY)
Classification: Main-belt Asteroid          SPK-ID: 2021109
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1235089721101063 4.4398e-08  
a 3.110501114254798 2.2703e-08 au
q 2.726326318885848 1.3679e-07 au
i 13.6927867360204 7.8883e-06 deg
node 356.3503861885627 1.6828e-05 deg
peri 118.6698750699541 3.4261e-05 deg
M 269.7276698583146 3.1341e-05 deg
tp 2459502.953783408161
(2021-Oct-15.45378341)
0.00017694 TDB
period 2003.751999566595
5.49
2.1938e-05
6.006e-08
d
yr
n .179662952340343 1.967e-09 deg/d
Q 3.494675909623748 2.5507e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1189  
   data-arc span      13277 days (36.35 yr)  
   first obs. used      1984-03-29  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5398  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:41:38  

Additional Information
 Earth MOID = 1.77263 au 
 Jupiter MOID = 1.64155 au 
 T_jup = 3.164 
[ 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 13.3   n/a MPO319348  
diameter diameter 10.611 km 0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21109 Sünkel           Discovered 1992 Sept. 4 by L. D. Schmadel and F. Börngen at Tautenburg.
Hans Sünkel (b. 1948) is professor of mathematical geodesy and geoinformatics at the Technical University of Graz. A well-known expert on the shape of the earth, he currently serves as the university's rector. The name was suggested by the first discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

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Alternate Designations
 1992 RY = 2000 EJ166 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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