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
JPL Small-Body Database Browser
Search: [ help ]  
79101 (1981 EJ31)
Classification: Main-belt Asteroid          SPK-ID: 2079101
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1159647171741836 5.1385e-08  
a 2.426893700543631 1.007e-08 au
q 2.145459658948282 1.2418e-07 au
i 5.139214321054433 4.9897e-06 deg
node 167.6842830577156 4.7036e-05 deg
peri 43.14868045754897 5.0114e-05 deg
M 106.5760875470526 1.5776e-05 deg
tp 2458591.680285371877
(2019-Apr-18.18028537)
6.0974e-05 TDB
period 1380.939201780581
3.78
8.5951e-06
2.353e-08
d
yr
n .2606921430978399 1.6226e-09 deg/d
Q 2.708327742138981 1.1238e-08 au
  Orbit Determination Parameters
   # obs. used (total)      677  
   data-arc span      14023 days (38.39 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57812  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:35:27  

Additional Information
 Earth MOID = 1.14374 au 
 Jupiter MOID = 2.25572 au 
 T_jup = 3.495 
[ 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 16.1   n/a MPO432340  

79101 (1981 EJ31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1981 EJ31 = 2000 GT89 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-09 14:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin