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21118 Hezimmermann (1992 SB17)
Classification: Main-belt Asteroid          SPK-ID: 2021118
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1956290747795953 3.2018e-08  
a 2.412120602084117 9.3057e-09 au
q 1.940239680441601 7.6633e-08 au
i 2.048227238150905 4.8486e-06 deg
node 346.3969337439267 0.00010777 deg
peri 60.5858272862024 0.00010868 deg
M 107.0471189229808 1.4684e-05 deg
tp 2458593.617101811279
(2019-Apr-20.11710181)
5.4699e-05 TDB
period 1368.349235567271
3.75
7.9184e-06
2.168e-08
d
yr
n .2630907305259364 1.5225e-09 deg/d
Q 2.884001523726633 1.1126e-08 au
  Orbit Determination Parameters
   # obs. used (total)      992  
   data-arc span      16033 days (43.90 yr)  
   first obs. used      1976-05-29  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:19:29  

Additional Information
 Earth MOID = .950917 au 
 Jupiter MOID = 2.50965 au 
 T_jup = 3.492 
[ 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 15.7   n/a MPO350969  

21118 Hezimmermann           Discovered 1992 Sept. 24 by L. D. Schmadel and F. Börngen at Tautenburg.
Helmut Zimmermann (b. 1926), director of Jena University Observatory from 1969 to 1978, worked on the interstellar radiation field and cloud collisions. He was the integrating figure in the new study course of astronomy for student teachers in Germany. The citation was prepared by W. Pfau.
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 SB17 = 2000 WU137 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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