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21380 Devanssay (1998 DB20)
Classification: Main-belt Asteroid          SPK-ID: 2021380
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2043117362360437 3.0109e-08  
a 2.271784972860168 5.9376e-09 au
q 1.807632640700154 6.6833e-08 au
i 6.624338048857227 3.3289e-06 deg
node 137.9836919090593 2.8795e-05 deg
peri 174.9719598827949 3.0071e-05 deg
M 65.49049490173844 9.3189e-06 deg
tp 2458972.977143169964
(2020-May-03.47714317)
3.1983e-05 TDB
period 1250.688799675549
3.42
4.9032e-06
1.342e-08
d
yr
n .2878413879562928 1.1285e-09 deg/d
Q 2.735937305020182 7.1507e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2109  
   data-arc span      10932 days (29.93 yr)  
   first obs. used      1991-03-08  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48415  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:44:18  

Additional Information
 Earth MOID = .791759 au 
 Jupiter MOID = 2.54958 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 14.71   n/a E2021B10  

21380 Devanssay           Discovered 1998 Feb. 27 by the OCA-DLR Asteroid Survey at Caussols.
Jean Benoit De Vanssay (b. 1970) is a French amateur astronomer and optician. As an amateur he has made several observing missions in the large amateur facilities in France (Pic du Midi, St. Véran), and as a professional has worked on optics for some of the largest telescopes in the world.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22

[ show close-approach data ]
Alternate Designations
 1998 DB20 = 1999 LB4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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