+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   85550 (1997 YW) Classification: Main-belt Asteroid          SPK-ID: 2085550 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1857069588903071 4.8611e-08   a 2.639979436261909 1.1376e-08 au q 2.149716883620763 1.2727e-07 au i 11.39399310301041 3.8367e-06 deg node 270.2120979645275 2.3594e-05 deg peri 134.4331562735028 2.6073e-05 deg M 123.467372247103 1.0773e-05 deg tp 2458463.160276782281 (2018-Dec-10.66027678) 4.5791e-05 TDB period 1566.748338753259 4.29 1.0127e-05 2.773e-08 d yr n .2297752556013369 1.4851e-09 deg/d Q 3.130241988903056 1.3488e-08 au   Orbit Determination Parameters    # obs. used (total)      1505      data-arc span      8165 days (22.35 yr)      first obs. used      1997-12-20      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46094      source      ORB      producer      Otto Matic      solution date      2020-May-20 15:37:42   Additional Information  Earth MOID = 1.1768 au   Jupiter MOID = 2.29 au   T_jup = 3.343  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.9   n/a MPO337903   85550 (1997 YW)          Discovered 1997-Dec-20 by Kobayashi, T. at Oizumi Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2174-Jan-24 02:29 00:04 Hebe 0.0473129807580639 0.047270684906307 0.0473552924486913 8.08252869926946 8.08252868301285 2515120.603239781 4.18471628058798 2512.3678838534 32.7969916980248 -32.9132923631765 117267.549151986 T 26 CATAB v2.0f-lin.ifort 2020-May-20 15:38:00 2020-May-20 15:38 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-19 23:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin