+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 11:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin