+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15942 (1997 YZ16) Classification: Main-belt Asteroid          SPK-ID: 2015942 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .116724660666393 1.6039e-08   a 2.433269177601105 6.6314e-09 au q 2.149246658535623 4.0259e-08 au i 5.473728746650742 1.0166e-06 deg node 149.6504833702927 7.5952e-06 deg peri 261.8942946481257 1.4149e-05 deg M 55.8838594370573 1.0666e-05 deg tp 2458985.287471449025 (2020-May-15.78747145) 4.0979e-05 TDB period 1386.38438824387 3.80 5.6674e-06 1.552e-08 d yr n .2596682442854186 1.0615e-09 deg/d Q 2.717291696666587 7.4054e-09 au   Orbit Determination Parameters    # obs. used (total)      2394      data-arc span      12964 days (35.49 yr)      first obs. used      1985-09-15      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47932      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:13:04   Additional Information  Earth MOID = 1.16706 au   Jupiter MOID = 2.613 au   T_jup = 3.491  [ 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 14.0   n/a MPO449067   diameter diameter 2.845 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.548   0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15942 (1997 YZ16)          Discovered 1997-Dec-23 by Ueda, S., Kaneda, H. at Kushiro Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 YZ16 = 1985 RA6 = 1989 TK2 = 1991 ER8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 18:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin