Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
12987 (1981 EF2)
Classification: Main-belt Asteroid          SPK-ID: 2012987
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02984850610465763 4.9646e-08  
a 2.429224691554452 1.7269e-08 AU
q 2.356715963519004 1.245e-07 AU
i 6.488535853673692 6.0829e-06 deg
node 300.3608900975748 5.2106e-05 deg
peri 323.0603579294147 0.00015953 deg
M 237.8725931350378 0.00015603 deg
tp 2457469.648780885218
(2016-Mar-22.14878089)
0.00060153 JED
period 1382.929233119854
3.79
1.4747e-05
4.038e-08
d
yr
n .2603170078253744 2.7759e-09 deg/d
Q 2.501733419589899 1.7785e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1066  
   data-arc span      15397 days (42.15 yr)  
   first obs. used      1973-01-01  
   last obs. used      2015-02-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50562  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:33:13  

Additional Information
 Earth MOID = 1.34523 AU 
 T_jup = 3.499 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5 mag n/a PDS3 (MPC 37483)  

12987 (1981 EF2)          Discovered 1981-Mar-05 by Debehogne, H., DeSanctis, G. at La Silla
Reference: 20000124/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EF2 = 1973 AO1 = 1986 RM3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-28 14:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin