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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594589592373972 1.8258e-07  
a 2.433718138100457 4.9728e-08 AU
q 2.045639976721782 4.1146e-07 AU
i 6.926735768900457 1.0269e-05 deg
node 287.4485565853721 8.5276e-05 deg
peri 238.8215222321416 9.1037e-05 deg
M 182.1988104146513 3.4872e-05 deg
tp 2457685.413941910668
(2016-Oct-23.91394191)
0.00014697 JED
period 1386.76810691124
3.80
4.2504e-05
1.164e-07
d
yr
n .2595963940949226 7.9565e-09 deg/d
Q 2.821796299479132 5.7658e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      259  
   data-arc span      6928 days (18.97 yr)  
   first obs. used      1995-09-02  
   last obs. used      2014-08-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50337  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 16:01:26  

Additional Information
 Earth MOID = 1.0642 AU 
 T_jup = 3.478 
[ 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 15.9 mag n/a MPO264142  

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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