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 ]  
15687 (1981 ES38)
Classification: Main-belt Asteroid          SPK-ID: 2015687
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1314612070093844 3.7627e-08  
a 2.382234552978813 8e-09 au
q 2.069063123264757 8.944e-08 au
i 6.572526138140193 4.0469e-06 deg
node 197.7936014062842 2.7952e-05 deg
peri 146.1430400739909 3.1692e-05 deg
M 81.36148603408357 1.2978e-05 deg
tp 2458696.977019900098
(2019-Aug-01.47701990)
4.8609e-05 TDB
period 1342.99750609509
3.68
6.7651e-06
1.852e-08
d
yr
n .2680570874973096 1.3503e-09 deg/d
Q 2.695405982692869 9.0517e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1298  
   data-arc span      14228 days (38.95 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52863  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:25:13  

Additional Information
 Earth MOID = 1.06575 au 
 Jupiter MOID = 2.71623 au 
 T_jup = 3.517 
[ 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 14.9   n/a MPO347648  

15687 (1981 ES38)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 ES38 = 1996 GS17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-05 09:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin