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21650 Tilgner (1999 OB1)
Classification: Main-belt Asteroid          SPK-ID: 2021650
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1232945541202352 2.8158e-08  
a 2.299817890352156 6.1962e-09 au
q 2.016262869003447 6.3695e-08 au
i 6.081439490456326 3.0554e-06 deg
node 232.7492890384848 3.5275e-05 deg
peri 49.89637181646267 3.9162e-05 deg
M 77.65596732023924 1.6598e-05 deg
tp 2458925.703667631164
(2020-Mar-17.20366763)
5.8636e-05 TDB
period 1273.909566341824
3.49
5.1483e-06
1.41e-08
d
yr
n .282594627995283 1.1421e-09 deg/d
Q 2.583372911700865 6.9602e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1913  
   data-arc span      10399 days (28.47 yr)  
   first obs. used      1992-08-23  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45144  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:51:11  

Additional Information
 Earth MOID = 1.00436 au 
 Jupiter MOID = 2.53069 au 
 T_jup = 3.575 
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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 15.06   n/a E2021B10  

21650 Tilgner           Discovered 1999 July 17 by S. Sposetti at Gnosca.
Bruno Tilgner (1933-2002) spent most of his career working for the European Space Agency. He later became a member of the strategy office. He greatly helped the discoverer in the identification of artificial satellites.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1999 OB1 = 1992 QV1 = 1998 DS5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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