+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160417 (2004 YL22) Classification: Main-belt Asteroid          SPK-ID: 2160417 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1706104071888283 6.758e-08   a 2.692687042108086 2.7494e-08 au q 2.233286609421944 1.8986e-07 au i 12.86520688917794 4.8035e-06 deg node 121.1439567980442 3.2203e-05 deg peri 235.1984882099844 3.496e-05 deg M 328.7426903066878 1.8695e-05 deg tp 2459340.628457823044 (2021-May-06.12845782) 8.5143e-05 TDB period 1613.90232592824 4.42 2.4718e-05 6.767e-08 d yr n .2230618261194618 3.4164e-09 deg/d Q 3.152087474794228 3.2184e-08 au   Orbit Determination Parameters    # obs. used (total)      250      data-arc span      6116 days (16.74 yr)      first obs. used      2003-08-25      last obs. used      2020-05-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .63568      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 12:27:51   Additional Information  Earth MOID = 1.25239 au   Jupiter MOID = 2.32764 au   T_jup = 3.314  [ 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 15.99   n/a E2021B55   160417 (2004 YL22)          Discovered 2004-Dec-18 by Mt. Lemmon Survey at Mount Lemmon Reference: 20070730/Numbers.arc Last Updated: 2007-08-06 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 19:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin