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12373 Lancearmstrong (1994 JE9)
Classification: Main-belt Asteroid          SPK-ID: 2012373
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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1144747764190397 3.1257e-08  
a 2.450111422678772 7.3966e-09 au
q 2.169635465365884 7.7949e-08 au
i 6.75224160725319 3.1189e-06 deg
node 118.4936386470687 2.8234e-05 deg
peri 150.1060048918652 3.1361e-05 deg
M 352.5523476146822 1.319e-05 deg
tp 2459425.479712769502
5.1311e-05 TDB
period 1400.803374978611
n .2569953830997136 1.1638e-09 deg/d
Q 2.73058737999166 8.2433e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2238  
   data-arc span      9948 days (27.24 yr)  
   first obs. used      1994-05-15  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4371  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 20:48:49  

Additional Information
 Earth MOID = 1.15629 au 
 Jupiter MOID = 2.35788 au 
 T_jup = 3.478 
[ 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 14.24   n/a MPO636253  
diameter diameter 3.291 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 7.01962 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.449   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

12373 Lancearmstrong           Discovered 1994 May 15 by C. P. de Saint-Aignan at Palomar.
Lance Armstrong (b. 1971) is an American cyclist and cancer survivor. After being diagnosed with advanced testicular cancer in 1996, he was able to return to cycling and is currently the three-time defending champion of the Tour de France. He serves as an inspiration to cancer survivors and athletes around the world.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011101/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1994 JE9 = 1997 AP22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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