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 ]  
16379 (1981 EJ18)
Classification: Main-belt Asteroid          SPK-ID: 2016379
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1328788437442783 3.2008e-08  
a 3.15424552105535 1.7339e-08 au
q 2.735113023331947 9.8661e-08 au
i 4.594309815494281 5.0909e-06 deg
node 341.5949855167669 4.5821e-05 deg
peri 107.0028729663138 5.1156e-05 deg
M 68.37657905739337 2.051e-05 deg
tp 2458611.860859022737
(2019-May-08.36085902)
0.00011643 TDB
period 2046.169794987523
5.60
1.6872e-05
4.619e-08
d
yr
n .1759384782640656 1.4508e-09 deg/d
Q 3.573378018778754 1.9644e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1251  
   data-arc span      14353 days (39.30 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52527  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:27:43  

Additional Information
 Earth MOID = 1.75611 au 
 Jupiter MOID = 1.6359 au 
 T_jup = 3.188 
[ 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 14.1   n/a MPO324461  
diameter diameter 9.276 km 0.241 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16379 (1981 EJ18)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EJ18 = 1998 FN141 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-22 23:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin