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17744 Jodiefoster (1998 BZ31)
Classification: Mars-crossing Asteroid          SPK-ID: 2017744
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .311264419958376 3.4732e-08  
a 2.39334904955822 9.451e-09 au
q 1.64838464588955 8.1644e-08 au
i 3.075111724519485 4.6596e-06 deg
node 240.7096792046996 6.874e-05 deg
peri 102.0978961182885 6.9206e-05 deg
M 125.2345319114698 9.5668e-06 deg
tp 2458530.033087808523
3.4025e-05 TDB
period 1352.407245859796
n .2661920076974515 1.5767e-09 deg/d
Q 3.13831345322689 1.2393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1210  
   data-arc span      16600 days (45.45 yr)  
   first obs. used      1974-08-21  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52937  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:11:15  

Additional Information
 Earth MOID = .644112 au 
 Jupiter MOID = 2.29664 au 
 T_jup = 3.461 
[ 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 15.1   n/a MPO449081  
diameter diameter 2.117 km 0.389 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.360   0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

17744 Jodiefoster           Discovered 1998 Jan. 18 by the OCA-DLR Asteroid Survey at Caussols.
Jodie Foster (b. 1962) is an accomplished actress and film director. For most astronomers she will always be Eleanor "Ellie" Arroway in Robert Zemeckis' movie Contact, based on the novel by the same name written by the late Carl Sagan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020921/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 BZ31 = 1974 QY = 1978 WH5 = 1989 UA9 = 2000 OC45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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