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17656 Hayabusa (1996 VL4)
Classification: Main-belt Asteroid          SPK-ID: 2017656
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07553224579772837 3.3436e-08  
a 2.806279915758569 1.2939e-08 au
q 2.594315291384264 9.5216e-08 au
i 3.473583841652362 3.5808e-06 deg
node 53.56294663670236 6.1284e-05 deg
peri 262.00649203 6.6649e-05 deg
M 95.23550767276704 2.5095e-05 deg
tp 2458546.253793148306
0.00012007 TDB
period 1717.097314464903
n .2096561429380526 1.45e-09 deg/d
Q 3.018244540132874 1.3917e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1276  
   data-arc span      10340 days (28.31 yr)  
   first obs. used      1991-10-13  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54382  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:09:06  

Additional Information
 Earth MOID = 1.58349 au 
 Jupiter MOID = 2.18216 au 
 T_jup = 3.316 
[ 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 14.6   n/a MPO309292  
rotation period rot_per 6.119 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

17656 Hayabusa           Discovered 1996 Nov. 6 by N. Sato at Chichibu.
The minor-planet explorer, Hayabusa (MUSES-C) was developed by JAXA/ISAS and launched in 2003. It traveled to (25143) Itokawa to capture samples of surface material. After overcoming many critical difficulties, Hayabusa finally returned to the earth in 2010, with fragments of surface material.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111210/MPCPages.arcLast Updated: 2011-12-12

Alternate Designations
 1996 VL4 = 1999 JM42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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