+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7402 (1987 YH) Classification: Main-belt Asteroid          SPK-ID: 2007402 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO244248 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2009462 n/a   a 2.7824034 n/a AU q 2.2232900 n/a AU i 8.23413 n/a deg node 150.98622 n/a deg peri 292.84309 n/a deg M 178.00013 n/a deg tp 2455562.3024718 (2010-Dec-31.80247180) n/a JED period 1695.2297178 4.64 n/a n/a d yr n 0.21236060 n/a deg/d Q 3.3415168 n/a AU   Orbit Determination Parameters    # obs. used (total)      858      first obs. used      1970-??-??      last obs. used      2012-05-15      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.288  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.1 mag n/a PDS3 (MPC 28827)   SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 7402 (1987 YH)          Discovered 1987-Dec-25 by Kojima, T. at Chiyoda Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1987 YH = 1956 ET = 1970 EQ2 = 1982 VN9  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 12:58 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin