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 ]  
30739 (1981 EN14)
Classification: Main-belt Asteroid          SPK-ID: 2030739
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07182931716962626 3.9941e-08  
a 2.374352807016413 8.3285e-09 au
q 2.203804666168639 9.5742e-08 au
i 1.997904886201275 3.1891e-06 deg
node 270.041471356488 0.00012637 deg
peri 256.9836089688197 0.00012832 deg
M 323.6305228475298 2.2746e-05 deg
tp 2459335.505313342710
(2021-May-01.00531334)
8.453e-05 TDB
period 1336.337957227812
3.66
7.0312e-06
1.925e-08
d
yr
n .2693929316703748 1.4174e-09 deg/d
Q 2.544900947864188 8.9267e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1094  
   data-arc span      14649 days (40.11 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:20  

Additional Information
 Earth MOID = 1.21101 au 
 Jupiter MOID = 2.42783 au 
 T_jup = 3.538 
[ 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 15.63   n/a MPCxxxxx  
diameter diameter 3.388 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.117   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30739 (1981 EN14)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EN14 = 1993 PH9 = 1997 TK19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-22 03:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin