+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   487772 (2015 RL208) Classification: Main-belt Asteroid          SPK-ID: 2487772 [ 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 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02246802023607584 7.6161e-08   a 2.714252575950053 5.2542e-08 au q 2.653268694147786 1.8733e-07 au i 1.671085484432064 7.9701e-06 deg node 72.78585355079449 0.00026687 deg peri 66.24723732654269 0.00035837 deg M 256.1356871066413 0.00024421 deg tp 2459471.735138034445 (2021-Sep-14.23513803) 0.0011159 TDB period 1633.329533182208 4.47 4.7426e-05 1.298e-07 d yr n .2204086760732316 6.3999e-09 deg/d Q 2.77523645775232 5.3722e-08 au   Orbit Determination Parameters    # obs. used (total)      67      data-arc span      5664 days (15.51 yr)      first obs. used      2004-03-23      last obs. used      2019-09-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6989      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 18:48:11   Additional Information  Earth MOID = 1.66632 au   Jupiter MOID = 2.2005 au   T_jup = 3.361  [ hide covariance matrix ] Orbital Elements at Epoch 2457150.5 (2015-May-08.0) TDB Reference: JPL 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02044513648744293 7.6258e-08   q 2.659808392783991 1.8709e-07 au tp 2457836.569415287528 (2017-Mar-24.06941529) 0.0012003 TDB node 72.7869992768177 0.00026686 deg peri 65.97057815300113 0.00037502 deg i 1.671881019437473 7.9672e-06 deg   Orbit Determination Parameters    # obs. used (total)      67      data-arc span      5664 days (15.51 yr)      first obs. used      2004-03-23      last obs. used      2019-09-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6989      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 18:48:11   Additional Information  Jupiter MOID = 2.2005 au   T_jup = 3.361  Orbit Covariance (6×6)   e q tp node peri i e 5.815261927425187E-15 -1.384287128271002E-14 3.87887784280096E-11 5.819730517425315E-14 8.550190084360135E-12 5.943640378228683E-16 q -1.384287128271002E-14 3.500243233361362E-14 -7.111360822289881E-11 -1.295654794443454E-13 -1.584364073710423E-11 -3.869576222433667E-17 tp 3.87887784280096E-11 -7.111360822289881E-11 1.440700366656226E-6 1.02247209331505E-9 3.163130187597653E-7 3.604664645274353E-11 node 5.819730517425315E-14 -1.295654794443454E-13 1.02247209331505E-9 7.121177416090809E-8 -7.095435996266173E-8 -5.627525941449275E-10 peri 8.550190084360135E-12 -1.584364073710423E-11 3.163130187597653E-7 -7.095435996266173E-8 1.406382074058203E-7 5.703755593536276E-10 i 5.943640378228683E-16 -3.869576222433667E-17 3.604664645274353E-11 -5.627525941449275E-10 5.703755593536276E-10 6.347618907764149E-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 17.5   n/a MPO450510   487772 (2015 RL208)          Discovered 2011-Oct-26 by Pan-STARRS 1 at Haleakala Reference: Last Updated: 2017-03-14 Alternate Designations  2015 RL208 = 2011 WU38  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-22 09:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin