+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1165599100161969 3.1855e-08   a 2.432846754357821 8.3721e-09 au q 2.149274355586676 8.1559e-08 au i 5.473595720171618 4.2072e-06 deg node 149.6538286317564 2.9534e-05 deg peri 261.8828937830019 3.4931e-05 deg M 3.959977866849318 1.9034e-05 deg tp 2458985.253828002988 (2020-May-15.75382800) 7.3266e-05 TDB period 1386.023382825465 3.79 7.1545e-06 1.959e-08 d yr n .2597358778075774 1.3407e-09 deg/d Q 2.716419153128965 9.3479e-09 au   Orbit Determination Parameters    # obs. used (total)      1965      data-arc span      12549 days (34.36 yr)      first obs. used      1985-09-15      last obs. used      2020-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50657      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 21:31:10   Additional Information  Earth MOID = 1.16793 au   Jupiter MOID = 2.61353 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 ] 2020-Oct-21 02:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin