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117329 Spencer (2004 XJ6)
Classification: Main-belt Asteroid          SPK-ID: 2117329
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1597850894545063 9.0064e-08  
a 2.433323263701569 2.4837e-08 au
q 2.044514488339282 2.1493e-07 au
i 6.926599817706077 8.5565e-06 deg
node 287.4384536508098 6.8514e-05 deg
peri 238.9010193304917 7.4439e-05 deg
M 337.9332700961195 3.2012e-05 deg
tp 2457685.483305175996
(2016-Oct-23.98330518)
0.000124 JED
period 1386.430612810397
3.80
2.1227e-05
5.812e-08
d
yr
n .2596595867644999 3.9755e-09 deg/d
Q 2.822132039063855 2.8805e-08 au
  Orbit Determination Parameters
   # obs. used (total)      338  
   data-arc span      7483 days (20.49 yr)  
   first obs. used      1995-09-02  
   last obs. used      2016-02-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50748  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 20:41:49  

Additional Information
 Earth MOID = 1.06136 au 
 Jupiter MOID = 2.20888 au 
 T_jup = 3.479 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1 mag n/a MPO366546  

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 | Physical Parameters | Discovery Circumstances ]
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