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 ]  
20976 (1981 EA6)
Classification: Main-belt Asteroid          SPK-ID: 2020976
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05654801297619048 5.1577e-08  
a 3.084731031825561 2.913e-08 au
q 2.910295621409832 1.6358e-07 au
i 6.221190092493657 5.9157e-06 deg
node 258.4975127156238 5.3602e-05 deg
peri 86.26764432177336 7.54e-05 deg
M 202.5799135736317 5.4212e-05 deg
tp 2459465.830529493604
(2021-Sep-08.33052949)
0.00030061 TDB
period 1978.902424014407
5.42
2.8031e-05
7.674e-08
d
yr
n .1819190252289969 2.5769e-09 deg/d
Q 3.25916644224129 3.0777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      560  
   data-arc span      13943 days (38.17 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58814  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:47:54  

Additional Information
 Earth MOID = 1.91036 au 
 Jupiter MOID = 2.00212 au 
 T_jup = 3.215 
[ 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 14.7   n/a PDS3 (MPO 8602)  
diameter diameter 7.522 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20976 (1981 EA6)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EA6 = 1997 ER59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-21 23:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin