+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1709018506101063 6.8325e-08   a 2.692075242911355 2.7842e-08 au q 2.231994601916153 1.926e-07 au i 12.86399409736903 4.9664e-06 deg node 121.1463558106689 3.244e-05 deg peri 235.3600555029439 3.538e-05 deg M 284.0100533365911 1.8459e-05 deg tp 2459341.051546653882 (2021-May-06.55154665) 8.5789e-05 TDB period 1613.352320648909 4.42 2.5028e-05 6.852e-08 d yr n .2231378697587913 3.4616e-09 deg/d Q 3.152155883906558 3.26e-08 au   Orbit Determination Parameters    # obs. used (total)      239      data-arc span      5731 days (15.69 yr)      first obs. used      2003-08-25      last obs. used      2019-05-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .64037      source      ORB      producer      Otto Matic      solution date      2019-May-30 07:33:09   Additional Information  Earth MOID = 1.253 au   Jupiter MOID = 2.32822 au   T_jup = 3.315  [ 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 15.8   n/a MPO433025   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 ] 2020-Jul-07 13:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin