+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8505 (1990 YK) Classification: Main-belt Asteroid          SPK-ID: 2008505 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO233567 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1564828 n/a   a 2.2448744 n/a AU q 1.8935902 n/a AU i 2.29643 n/a deg node 172.23969 n/a deg peri 322.75175 n/a deg M 206.34226 n/a deg tp 2456924.8707143 (2014-Sep-24.37071430) n/a JED period 1228.5320424 3.36 n/a n/a d yr n 0.29303265 n/a deg/d Q 2.5961586 n/a AU   Orbit Determination Parameters    # obs. used (total)      913      first obs. used      1981-??-??      last obs. used      2012-06-23      # oppositions      16      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.614  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.6 mag n/a PDS3 (MPC 31497)   8505 (1990 YK)          Discovered 1990-Dec-19 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 19980313/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 YK = 1971 DP1 = 1981 CE1 = 1988 GP  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-26 00:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin