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117217 (2004 RA254)
Classification: Main-belt Asteroid          SPK-ID: 2117217
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321592366425026 4.8767e-08  
a 2.684560186038591 2.0883e-08 au
q 2.329770761130876 1.36e-07 au
i 10.84665578596979 4.1641e-06 deg
node 97.16006045942319 2.8069e-05 deg
peri 261.8195330462913 3.198e-05 deg
M 201.1023930538398 1.851e-05 deg
tp 2459709.625332536919
(2022-May-10.12533254)
8.692e-05 TDB
period 1606.601412189864
4.40
1.8747e-05
5.133e-08
d
yr
n .2240754908271275 2.6147e-09 deg/d
Q 3.039349610946306 2.3643e-08 au
  Orbit Determination Parameters
   # obs. used (total)      802  
   data-arc span      7140 days (19.55 yr)  
   first obs. used      2000-10-30  
   last obs. used      2020-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57746  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:20:23  

Additional Information
 Earth MOID = 1.35561 au 
 Jupiter MOID = 2.44683 au 
 T_jup = 3.337 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456948.5 (2014-Oct-18.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1295978951123895 4.8482e-08  
q 2.33932059215346 1.348e-07 au
tp 2456492.372708948064
(2013-Jul-18.87270895)
7.5103e-05 TDB
node 97.28288623262021 2.7997e-05 deg
peri 261.4197305340575 3.2145e-05 deg
i 10.85585234484821 4.1678e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      802  
   data-arc span      7140 days (19.55 yr)  
   first obs. used      2000-10-30  
   last obs. used      2020-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57746  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:20:23  

Additional Information
 Jupiter MOID = 2.44683 au 
 T_jup = 3.337 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.350537632143065E-15 -6.478294363804551E-15 6.289064494462468E-14 -5.792703325947271E-16 -2.692050914266584E-14 -1.349943314164041E-15
q -6.478294363804551E-15 1.817158794771343E-14 3.656470855674763E-14 4.238481923608874E-15 1.355553664065535E-13 4.494908602139234E-15
tp 6.289064494462468E-14 3.656470855674763E-14 5.640463886550958E-9 7.07808750312371E-12 1.224908791513958E-9 -1.168970622967728E-12
node -5.792703325947271E-16 4.238481923608874E-15 7.07808750312371E-12 7.838425744370746E-10 -7.675486364149623E-10 1.216323815512195E-11
peri -2.692050914266584E-14 1.355553664065535E-13 1.224908791513958E-9 -7.675486364149623E-10 1.033269416372391E-9 -1.208247306197324E-11
i -1.349943314164041E-15 4.494908602139234E-15 -1.168970622967728E-12 1.216323815512195E-11 -1.208247306197324E-11 1.737067250602215E-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 15.0   n/a MPO432677  
diameter diameter 2.999 km 0.584 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.236   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117217 (2004 RA254)          Discovered 2004-Sep-06 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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