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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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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
(2019-Dec-02.82038477)
7.21e-05 TDB
period 1495.970145404895
4.10
1.2001e-05
3.286e-08
d
yr
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 
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Orbital Elements at Epoch 2455758.5 (2011-Jul-16.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1751725457452526 6.1252e-08  
q 2.112286480877037 1.5801e-07 au
tp 2455828.639307083889
(2011-Sep-24.13930708)
5.794e-05 TDB
node 197.2055226857726 0.0001445 deg
peri 121.7195211869722 0.000145 deg
i 2.208613090158954 5.816e-06 deg
  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
 Jupiter MOID = 2.29118 au 
 T_jup = 3.412 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.751814025127297E-15 -9.65387688708348E-15 4.57488480899414E-13 2.37720913834218E-14 1.409144733854295E-13 -1.664758169597846E-15
q -9.65387688708348E-15 2.496672810417084E-14 -8.349346450665889E-13 -5.99948959368931E-14 -2.949018146079452E-13 4.405555428856787E-15
tp 4.57488480899414E-13 -8.349346450665889E-13 3.357028849928824E-9 2.155635749056894E-11 7.400003204284985E-10 4.804732307238558E-15
node 2.37720913834218E-14 -5.99948959368931E-14 2.155635749056894E-11 2.088154028898677E-8 -2.086046202388057E-8 -4.361943372443542E-10
peri 1.409144733854295E-13 -2.949018146079452E-13 7.400003204284985E-10 -2.086046202388057E-8 2.102618854066943E-8 4.358407609214738E-10
i -1.664758169597846E-15 4.405555428856787E-15 4.804732307238558E-15 -4.361943372443542E-10 4.358407609214738E-10 3.382568583998287E-11

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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