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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593393897122679 1.8459e-07  
a 2.43392571991535 5.0357e-08 AU
q 2.046105481099046 4.1791e-07 AU
i 6.926983807195468 1.0687e-05 deg
node 287.4508708087426 9.1643e-05 deg
peri 238.8064195963091 0.00010119 deg
M 130.3053290491418 3.9169e-05 deg
tp 2456298.482237873597
(2013-Jan-05.98223787)
0.00014591 JED
period 1386.94553541512
3.80
4.3043e-05
1.178e-07
d
yr
n .2595631845718082 8.0554e-09 deg/d
Q 2.821745958731654 5.8381e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      252  
   data-arc span      6485 days (17.75 yr)  
   first obs. used      1995-09-02  
   last obs. used      2013-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50483  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 00:07:18  

Additional Information
 Earth MOID = 1.06418 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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