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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1232945544035992 2.8275e-08  
a 2.299817890492984 6.205e-09 au
q 2.016262868475226 6.395e-08 au
i 6.081439530389542 3.0596e-06 deg
node 232.7492883320507 3.5335e-05 deg
peri 49.89637277276896 3.923e-05 deg
M 77.6559670100593 1.6611e-05 deg
tp 2458925.703668703538
(2020-Mar-17.20366870)
5.8686e-05 TDB
period 1273.909566458834
3.49
5.1556e-06
1.412e-08
d
yr
n .2825946279693263 1.1437e-09 deg/d
Q 2.583372912510742 6.97e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1876  
   data-arc span      10363 days (28.37 yr)  
   first obs. used      1992-08-23  
   last obs. used      2021-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45383  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:47  

Additional Information
 Earth MOID = 1.00436 au 
 Jupiter MOID = 2.53069 au 
 T_jup = 3.575 
[ 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 15.06   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

[ show close-approach data ]
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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