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69231 Alettajacobs (1972 FE)
Classification: Main-belt Asteroid          SPK-ID: 2069231
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2620256699133609 7.8838e-08  
a 2.645170712359316 1.7205e-08 au
q 1.952068084418164 2.0864e-07 au
i 31.64872649030152 1.302e-05 deg
node 170.3774317949193 1.178e-05 deg
peri 55.02033577187911 4.813e-05 deg
M 88.67980657133009 3.0401e-05 deg
tp 2457213.419564043744
0.00013387 JED
period 1571.37190902831
n .2290991699238237 2.2353e-09 deg/d
Q 3.338273340300468 2.1714e-08 au
  Orbit Determination Parameters
   # obs. used (total)      338  
   data-arc span      15813 days (43.29 yr)  
   first obs. used      1972-03-17  
   last obs. used      2015-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53137  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 16:27:46  

Additional Information
 Earth MOID = 1.05591 au 
 Jupiter MOID = 1.92396 au 
 T_jup = 3.139 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2 mag n/a MPO344800  

69231 Alettajacobs           Discovered 1972 Mar. 16 by T. Gehrels at Palomar.
Aletta Jacobs (1854-1929) was the first Dutch woman to graduate from a university and the first Dutch female physician. She helped initiate The Hague Congress of 1915 that led to the formation of the Women's International League for Peace and Freedom. The name was suggested by L. E. Timmerman.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100130/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1972 FE = 2002 EV9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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