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(1998 WB2)
Classification: Apollo [NEO, PHA]          SPK-ID: 3015695
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | 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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5868822972585014 3.7767e-08  
a 1.975846469203293 3.9594e-09 au
q .8162571543271655 7.3033e-08 au
i 2.384184190243582 4.5876e-06 deg
node 52.33669195177973 5.0626e-05 deg
peri 78.61197424131235 5.6683e-05 deg
M 114.0194477853562 4.4192e-06 deg
tp 2457279.204493116113
1.16e-05 JED
period 1014.444331426194
n .3548740811571994 1.0667e-09 deg/d
Q 3.13543578407942 6.2831e-09 au
  Orbit Determination Parameters
   # obs. used (total)      224  
   data-arc span      4197 days (11.49 yr)  
   first obs. used      1998-11-18  
   last obs. used      2010-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57199  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 00:32:57  

Additional Information
 Earth MOID = .0145638 au 
 Jupiter MOID = 1.94628 au 
 T_jup = 3.630 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 21.8 mag n/a MPO176738  
rotation period rot_per 0.313 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Pravec, P.; Hergenrother, C.; Whiteley, R.; Sarounova, L.; et al. (2000) Icarus 147, 477-486.]

[ show close-approach data ]
Alternate Designations
 1998 WB2 = 2010 GJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
FirstGov 2016-May-03 16:18 UT
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