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 ]  
14810 (1981 EM31)
Classification: Main-belt Asteroid          SPK-ID: 2014810
[ 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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104305936444643 3.1906e-08  
a 2.408420314824721 9.7649e-09 au
q 2.142457029713239 7.6735e-08 au
i 1.317217306267932 4.3843e-06 deg
node 162.3912117181768 0.00017093 deg
peri 140.8125562230143 0.00017237 deg
M 321.2310454286754 2.4188e-05 deg
tp 2458747.520683999979
(2019-Sep-21.02068400)		 9.1999e-05 TDB
period 1365.201791619636
3.74		 8.3028e-06
2.273e-08		 d
yr
n .263697280658346 1.6037e-09 deg/d
Q 2.674383599936202 1.0843e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1048  
   data-arc span      14504 days (39.71 yr)  
   first obs. used      1978-07-07  
   last obs. used      2018-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54279  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:26:48  

Additional Information
 Earth MOID = 1.12656 au 
 Jupiter MOID = 2.50742 au 
 T_jup = 3.512 
[ 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 15.6   n/a MPO435839  
diameter diameter 4.177 km 0.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

14810 (1981 EM31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20000523/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
[ 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