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117329 Spencer (2004 XJ6)
Classification: Main-belt Asteroid          SPK-ID: 2117329
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159100924118455 5.5104e-08  
a 2.433336905966307 1.6542e-08 au
q 2.046190755535525 1.2946e-07 au
i 6.926750965141368 6.3558e-06 deg
node 287.3895665516446 4.7797e-05 deg
peri 238.7017502913858 5.2287e-05 deg
M 84.49334090581002 2.5289e-05 deg
tp 2459071.096834574542
(2020-Aug-09.59683457)
9.5495e-05 TDB
period 1386.442272223012
3.80
1.4138e-05
3.871e-08
d
yr
n .2596574031335459 2.6477e-09 deg/d
Q 2.820483056397089 1.9174e-08 au
  Orbit Determination Parameters
   # obs. used (total)      420  
   data-arc span      9420 days (25.79 yr)  
   first obs. used      1995-09-02  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52907  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:52:38  

Additional Information
 Earth MOID = 1.06474 au 
 Jupiter MOID = 2.20484 au 
 T_jup = 3.479 
[ 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 16.01   n/a E2021B55  
diameter diameter 2.958 km 0.654 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.088   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117329 Spencer           Discovered 2004 Dec. 9 at the Jarnac Observatory.
Henry Spencer (b. 1955) is a Canadian computer scientist and small-satellite engineer. He has been a pioneer of open-source software, including C News and the "regex" pattern-matching library. He is also the keeper of the oldest surviving Usenet archives and the software architect for the MOST astronomy satellite.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

Alternate Designations
 2004 XJ6 = 2003 TU47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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