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 ]  
18312 (1981 EC19)
Classification: Main-belt Asteroid          SPK-ID: 2018312
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1187893154211877 5.4376e-08  
a 2.281798379213039 8.9138e-09 au
q 2.010745111817147 1.236e-07 au
i 5.580468032950181 5.5229e-06 deg
node 350.9506359640146 4.1383e-05 deg
peri 32.21641198888645 4.453e-05 deg
M 163.8528738823745 1.6127e-05 deg
tp 2458027.485132814486
(2017-Sep-30.98513281)
5.5897e-05 TDB
period 1258.966945766674
3.45
7.3772e-06
2.02e-08
d
yr
n .2859487305925816 1.6756e-09 deg/d
Q 2.552851646608932 9.9726e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1205  
   data-arc span      13959 days (38.22 yr)  
   first obs. used      1981-02-13  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49764  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:35:36  

Additional Information
 Earth MOID = 1.01501 au 
 Jupiter MOID = 2.90599 au 
 T_jup = 3.589 
[ 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 15.2   n/a MPO381410  
diameter diameter 3.125 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18312 (1981 EC19)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-25 20:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin