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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321592367601697 4.8767e-08  
a 2.684560186254123 2.089e-08 au
q 2.329770761002039 1.36e-07 au
i 10.84665568785851 4.1667e-06 deg
node 97.16006030103648 2.807e-05 deg
peri 261.8195330286169 3.1983e-05 deg
M 201.1023931335585 1.8511e-05 deg
tp 2459709.625332266552
(2022-May-10.12533227)
8.6922e-05 TDB
period 1606.601412383346
4.40
1.8753e-05
5.134e-08
d
yr
n .2240754908001423 2.6155e-09 deg/d
Q 3.039349611506208 2.3651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      7121 days (19.50 yr)  
   first obs. used      2000-10-30  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5775  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:10:00  

Additional Information
 Earth MOID = 1.35561 au 
 Jupiter MOID = 2.44683 au 
 T_jup = 3.337 
[ 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 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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