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 ]  
146946 (2002 EC21)
Classification: Inner Main-belt Asteroid          SPK-ID: 2146946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09187989284156764 4.1482e-08  
a 1.905620329502426 6.5e-09 au
q 1.730532137831031 7.9536e-08 au
i 19.86084835028046 6.8345e-06 deg
node 359.595690774988 1.3238e-05 deg
peri 84.28161887567319 5.0289e-05 deg
M 256.0539846664652 4.3085e-05 deg
tp 2458877.933140331684
(2020-Jan-29.43314033)
0.00011453 TDB
period 960.8442439946465
2.63
4.9161e-06
1.346e-08
d
yr
n .3746705069526397 1.917e-09 deg/d
Q 2.080708521173822 7.0972e-09 au
  Orbit Determination Parameters
   # obs. used (total)      436  
   data-arc span      7676 days (21.02 yr)  
   first obs. used      1998-11-19  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60493  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 13:01:38  

Additional Information
 Earth MOID = .82974 au 
 Jupiter MOID = 3.06939 au 
 T_jup = 3.864 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.7   n/a MPO220373  

146946 (2002 EC21)          Discovered 2002-Mar-10 by NEAT at Haleakala
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-11 23:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin