+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   469916 (2005 YL91) Classification: Main-belt Asteroid          SPK-ID: 2469916 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1205194592263139 8.1484e-08   a 2.571301381209735 2.2257e-08 au q 2.261409529238463 2.1479e-07 au i 3.142961210026038 7.2146e-06 deg node 260.6516224086923 0.00011826 deg peri 174.5170676953378 0.00012226 deg M 211.3856693715912 3.009e-05 deg tp 2459622.207477036925 (2022-Feb-11.70747704) 0.00012978 TDB period 1506.010159228271 4.12 1.9554e-05 5.354e-08 d yr n .2390422121617532 3.1037e-09 deg/d Q 2.881193233181006 2.494e-08 au   Orbit Determination Parameters    # obs. used (total)      161      data-arc span      4894 days (13.40 yr)      first obs. used      2005-11-30      last obs. used      2019-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50367      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 04:17:18   Additional Information  Earth MOID = 1.27654 au   Jupiter MOID = 2.35051 au   T_jup = 3.417  [ 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 17.0   n/a MPO434692   469916 (2005 YL91)          Discovered 2005-Nov-30 by Mt. Lemmon Survey at Mount Lemmon Reference: Last Updated: 2016-08-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 15:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin