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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593444619485433 5.794e-08  
a 2.433639329025192 1.7622e-08 au
q 2.045852379564859 1.3811e-07 au
i 6.927018848727845 6.42e-06 deg
node 287.3902435663831 5.0657e-05 deg
peri 238.6755859503361 5.4844e-05 deg
M 341.683264553514 2.5231e-05 deg
tp 2459071.055085381968
(2020-Aug-09.55508538)
9.7638e-05 TDB
period 1386.700747615004
3.80
1.5062e-05
4.124e-08
d
yr
n .2596090040473163 2.8198e-09 deg/d
Q 2.821426278485526 2.043e-08 au
  Orbit Determination Parameters
   # obs. used (total)      412  
   data-arc span      8918 days (24.42 yr)  
   first obs. used      1995-09-02  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5338  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:45:32  

Additional Information
 Earth MOID = 1.06362 au 
 Jupiter MOID = 2.20548 au 
 T_jup = 3.479 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456801.5 (2014-May-24.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593397079590055 5.8048e-08  
q 2.046104532326911 1.3841e-07 au
tp 2456298.482670961259
(2013-Jan-05.98267096)
8.3613e-05 TDB
node 287.4508426650723 5.0655e-05 deg
peri 238.806524682365 5.4825e-05 deg
i 6.926982121683532 6.4199e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      412  
   data-arc span      8918 days (24.42 yr)  
   first obs. used      1995-09-02  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5338  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:45:32  

Additional Information
 Jupiter MOID = 2.20548 au 
 T_jup = 3.479 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.369579515675076E-15 -7.991578607562225E-15 2.527663933040368E-13 -2.838469636175028E-14 1.673705610681576E-13 9.875983322898997E-16
q -7.991578607562225E-15 1.915747530185953E-14 -2.18760860049595E-13 6.984634787128456E-14 -2.934727059207267E-13 -2.348847242763809E-15
tp 2.527663933040368E-13 -2.18760860049595E-13 6.991139797361832E-9 1.445170041922519E-11 1.78500241703242E-9 -2.397597753266347E-12
node -2.838469636175028E-14 6.984634787128456E-14 1.445170041922519E-11 2.565895939039821E-9 -2.542862445230257E-9 1.937144856999171E-12
peri 1.673705610681576E-13 -2.934727059207267E-13 1.78500241703242E-9 -2.542862445230257E-9 3.0057366065729E-9 -2.51587729775758E-12
i 9.875983322898997E-16 -2.348847242763809E-15 -2.397597753266347E-12 1.937144856999171E-12 -2.51587729775758E-12 4.121575680137758E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO417610  
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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