Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2045514270903987 3.6907e-08  
a 2.27164851421692 8.5049e-09 au
q 1.806979568786065 8.5141e-08 au
i 6.623245515192682 4.2298e-06 deg
node 137.9979778512643 3.0522e-05 deg
peri 175.0870516843874 3.1812e-05 deg
M 252.6909782079496 1.0253e-05 deg
tp 2458973.272498596045
(2020-May-03.77249860)
3.682e-05 TDB
period 1250.576114230478
3.42
7.0231e-06
1.923e-08
d
yr
n .2878673244303248 1.6166e-09 deg/d
Q 2.736317459647775 1.0245e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1556  
   data-arc span      10288 days (28.17 yr)  
   first obs. used      1991-03-08  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50231  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:59:54  

Additional Information
 Earth MOID = .79227 au 
 Jupiter MOID = 2.54769 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 14.6   n/a MPO337439  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin