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25399 Vonnegut (1999 VN20)
Classification: Main-belt Asteroid          SPK-ID: 2025399
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08842489449466732 1.1484e-07  
a 2.584234819780884 2.3287e-08 au
q 2.355724128492314 2.9641e-07 au
i 22.49560561136324 9.3388e-06 deg
node .4598588340956415 1.5387e-05 deg
peri 167.3004939724859 4.4866e-05 deg
M 250.7314907204743 4.9647e-05 deg
tp 2458061.062851175012
0.00021231 JED
period 1517.387100055109
n .2372499410248878 3.2068e-09 deg/d
Q 2.812745511069455 2.5346e-08 au
  Orbit Determination Parameters
   # obs. used (total)      987  
   data-arc span      8334 days (22.82 yr)  
   first obs. used      1993-03-20  
   last obs. used      2016-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48761  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 20:38:19  

Additional Information
 Earth MOID = 1.36236 au 
 Jupiter MOID = 2.15719 au 
 T_jup = 3.311 
[ 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 13.0 mag n/a MPO347714  
rotation period rot_per 11.5967 h n/a LCDB (Rev. 2016-February); 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. (2016) Astron. J. 150, A75.]

25399 Vonnegut           Discovered 1999 Nov. 11 by C. W. Juels at Fountain Hills.
Kurt Vonnegut (b. 1922) is a revolutionary U.S. science-fiction writer who crossed over into mainstream literature and is often referred to as the "Mark Twain of the second half of the twentieth century". He is most famous for his novel Slaughterhouse 5.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1999 VN20 = 2000 XC50 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-02 12:35 UT
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