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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1591960392485235 5.781e-08  
a 2.43322204980208 1.7548e-08 au
q 2.045862736861416 1.3784e-07 au
i 6.926946793322355 6.4199e-06 deg
node 287.3888757637038 5.0571e-05 deg
peri 238.6657682605247 5.4764e-05 deg
M 33.62198134690588 2.5511e-05 deg
tp 2459071.023233777208
(2020-Aug-09.52323378)
9.7414e-05 TDB
period 1386.344110993173
3.80
1.4998e-05
4.106e-08
d
yr
n .2596757883885676 2.8092e-09 deg/d
Q 2.820581362742745 2.0342e-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 = 1.06336 au 
 Jupiter MOID = 2.20541 au 
 T_jup = 3.479 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456806.5 (2014-May-29.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593413166563099 5.7907e-08  
q 2.04609959089303 1.3815e-07 au
tp 2456298.484717131934
(2013-Jan-05.98471713)
8.3482e-05 TDB
node 287.4508309633518 5.0564e-05 deg
peri 238.8067724139018 5.4734e-05 deg
i 6.926978340168858 6.4199e-06 deg
  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
 Jupiter MOID = 2.20541 au 
 T_jup = 3.479 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.353271389253851E-15 -7.95721450264642E-15 2.339963282159076E-13 -2.833098733571578E-14 1.627274757659128E-13 9.870250518782834E-16
q -7.95721450264642E-15 1.908507307691748E-14 -1.792266606669228E-13 6.960955877076581E-14 -2.835741048600215E-13 -2.34828404727754E-15
tp 2.339963282159076E-13 -1.792266606669228E-13 6.969311478852956E-9 1.371383557896382E-11 1.780394425932737E-9 -2.401119683523158E-12
node -2.833098733571578E-14 6.960955877076581E-14 1.371383557896382E-11 2.556740977463403E-9 -2.533962361987517E-9 1.905646693251357E-12
peri 1.627274757659128E-13 -2.835741048600215E-13 1.780394425932737E-9 -2.533962361987517E-9 2.995780860803419E-9 -2.485516858078314E-12
i 9.870250518782834E-16 -2.34828404727754E-15 -2.401119683523158E-12 1.905646693251357E-12 -2.485516858078314E-12 4.121559303619151E-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 16.01   n/a E2021B55  
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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