+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100279 (1994 YL4) Classification: Main-belt Asteroid          SPK-ID: 2100279 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1300294237420044 3.8566e-08   a 2.375733701663068 1.1722e-08 au q 2.066818417471361 9.3366e-08 au i .7663636699083066 4.6383e-06 deg node 326.2770593572375 0.00043032 deg peri 169.3097536700567 0.00043113 deg M 317.5034555539385 2.8559e-05 deg tp 2459158.386930367465 (2020-Nov-04.88693037) 0.00010686 TDB period 1337.503923511484 3.66 9.8991e-06 2.71e-08 d yr n .2691580889384277 1.9921e-09 deg/d Q 2.684648985854776 1.3246e-08 au   Orbit Determination Parameters    # obs. used (total)      315      data-arc span      9087 days (24.88 yr)      first obs. used      1994-12-31      last obs. used      2019-11-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60457      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 08:35:11   Additional Information  Earth MOID = 1.08071 au   Jupiter MOID = 2.34097 au   T_jup = 3.530  [ 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 17.1   n/a MPO493563   100279 (1994 YL4)          Discovered 1994-Dec-31 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-05 05:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin