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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1596742234601041 1.053e-07  
a 2.433084909434235 2.8982e-08 au
q 2.044583965907826 2.4631e-07 au
i 6.926901316414001 8.8831e-06 deg
node 287.4396154388986 7.5497e-05 deg
peri 238.9061299074517 8.0762e-05 deg
M 285.9826687117957 3.2271e-05 deg
tp 2457685.513378525506
(2016-Oct-24.01337853)
0.00012716 JED
period 1386.226907717945
3.80
2.4768e-05
6.781e-08
d
yr
n .25969774356252 4.6401e-09 deg/d
Q 2.821585852960645 3.3609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      318  
   data-arc span      7411 days (20.29 yr)  
   first obs. used      1995-09-02  
   last obs. used      2015-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51332  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 17:11:24  

Additional Information
 Earth MOID = 1.06243 au 
 Jupiter MOID = 2.20963 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 16.0 mag n/a MPO348190  

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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