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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1231707796774909 4.5686e-08  
a 3.110869577453186 2.3539e-08 au
q 2.727701346123291 1.3986e-07 au
i 13.69143545120705 7.9696e-06 deg
node 356.3549538243481 1.7164e-05 deg
peri 118.7212991683837 3.5032e-05 deg
M 197.773006762902 3.1855e-05 deg
tp 2459503.612286436580
(2021-Oct-16.11228644)
0.00018195 TDB
period 2004.108050267559
5.49
2.2747e-05
6.228e-08
d
yr
n .1796310333427073 2.0388e-09 deg/d
Q 3.494037808783082 2.6439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1142  
   data-arc span      13001 days (35.59 yr)  
   first obs. used      1984-03-29  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54859  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:11:59  

Additional Information
 Earth MOID = 1.77429 au 
 Jupiter MOID = 1.64307 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

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