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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595556971250716 6.3103e-08  
a 2.433529704627269 1.9991e-08 au
q 2.045246176130896 1.4797e-07 au
i 6.926674398221393 6.8102e-06 deg
node 287.3925200152333 5.3528e-05 deg
peri 238.7164661382475 5.8171e-05 deg
M 237.8184712179771 2.7037e-05 deg
tp 2459071.104915029682
(2020-Aug-09.60491503)
0.00010774 TDB
period 1386.60705181496
3.80
1.7086e-05
4.678e-08
d
yr
n .2596265463447545 3.1992e-09 deg/d
Q 2.821813233123642 2.3181e-08 au
  Orbit Determination Parameters
   # obs. used (total)      370  
   data-arc span      8411 days (23.03 yr)  
   first obs. used      1995-09-02  
   last obs. used      2018-09-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55172  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 04:36:04  

Additional Information
 Earth MOID = 1.06348 au 
 Jupiter MOID = 2.20658 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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