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 ]  
39508 (1981 EW46)
Classification: Main-belt Asteroid          SPK-ID: 2039508
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .11943578959297 3.6165e-08  
a 2.968014225994477 2.0906e-08 au
q 2.613527103389659 1.1512e-07 au
i .8371205145605108 5.7298e-06 deg
node 32.09325841694614 0.00037383 deg
peri 45.92734768139434 0.0003751 deg
M 323.068182536458 3.3716e-05 deg
tp 2459192.100030479402
(2020-Dec-08.60003048)
0.00017597 TDB
period 1867.658179581217
5.11
1.9733e-05
5.403e-08
d
yr
n .1927547577687489 2.0366e-09 deg/d
Q 3.322501348599296 2.3403e-08 au
  Orbit Determination Parameters
   # obs. used (total)      689  
   data-arc span      14165 days (38.78 yr)  
   first obs. used      1981-02-13  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56925  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:28:07  

Additional Information
 Earth MOID = 1.62907 au 
 Jupiter MOID = 1.90585 au 
 T_jup = 3.253 
[ 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 15.0   n/a MPO309459  

39508 (1981 EW46)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EW46 = 1999 VC93 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-31 16:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin