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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593444622969319 5.7799e-08  
a 2.433639328918727 1.7551e-08 au
q 2.045852378627506 1.3785e-07 au
i 6.927018781588061 6.4199e-06 deg
node 287.3902443379787 5.0567e-05 deg
peri 238.6755852032849 5.4753e-05 deg
M 341.683264603787 2.516e-05 deg
tp 2459071.055085183689
(2020-Aug-09.55508518)
9.7361e-05 TDB
period 1386.700747524007
3.80
1.5001e-05
4.107e-08
d
yr
n .2596090040643521 2.8085e-09 deg/d
Q 2.821426279209947 2.0348e-08 au
  Orbit Determination Parameters
   # obs. used (total)      416  
   data-arc span      8936 days (24.47 yr)  
   first obs. used      1995-09-02  
   last obs. used      2020-02-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:19:31  

Additional Information
 Earth MOID = 1.06362 au 
 Jupiter MOID = 2.20548 au 
 T_jup = 3.479 
[ show covariance matrix ]

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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