+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   215129 (1999 RW153) Classification: Main-belt Asteroid          SPK-ID: 2215129 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1542885187480162 5.7519e-08   a 2.381196961546217 1.5166e-08 au q 2.013805609501974 1.352e-07 au i 5.922043726737286 6.8838e-06 deg node 201.412637041072 3.9275e-05 deg peri 159.9988352828395 4.2567e-05 deg M 216.736950766534 1.9967e-05 deg tp 2459534.600637306551 (2021-Nov-16.10063731) 7.8176e-05 TDB period 1342.120180040415 3.67 1.2822e-05 3.51e-08 d yr n .2682323128388989 2.5626e-09 deg/d Q 2.748588313590459 1.7506e-08 au   Orbit Determination Parameters    # obs. used (total)      372      data-arc span      7567 days (20.72 yr)      first obs. used      1999-09-07      last obs. used      2020-05-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49133      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 03:43:53   Additional Information  Earth MOID = 1.01242 au   Jupiter MOID = 2.71637 au   T_jup = 3.515  [ 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 16.6   n/a MPO264529   215129 (1999 RW153)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20090607/Numbers.arc Last Updated: 2009-06-08 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 02:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin