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JPL Small-Body Database Browser
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12855 Tewksbury (1998 HS32)
Classification: Main-belt Asteroid          SPK-ID: 2012855
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1773469453839732 6.1465e-08  
a 2.559860701009964 1.369e-08 au
q 2.105877225077371 1.5894e-07 au
i 2.208086168036959 5.8105e-06 deg
node 197.0591949220316 0.00014488 deg
peri 121.4383679899962 0.00014535 deg
M 43.35959623494787 1.7612e-05 deg
tp 2458820.320384765854
7.21e-05 TDB
period 1495.970145404895
n .2406465136391898 1.9305e-09 deg/d
Q 3.013844176942557 1.6118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1046  
   data-arc span      10067 days (27.56 yr)  
   first obs. used      1991-10-13  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56584  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:05:58  

Additional Information
 Earth MOID = 1.09378 au 
 Jupiter MOID = 2.29118 au 
 T_jup = 3.412 
[ 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 MPO395127  

12855 Tewksbury           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Carolyn Morgan Tewksbury (b. 1985) is a finalist in the 2002 Intel International Science and Engineering Fair for her earth and space sciences project. She attends the Clinton High School, Deansboro, New York, U.S.A.
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
 1998 HS32 = 1999 RE20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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