+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   3971 Voronikhin (1979 YM8) Classification: Main-belt Asteroid          SPK-ID: 2003971 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256892 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1821719 n/a   a 2.8524546 n/a AU q 2.3328175 n/a AU i 13.00663 n/a deg node 284.85088 n/a deg peri 84.04095 n/a deg M 46.51918 n/a deg tp 2456173.1179922 (2012-Sep-02.61799220) n/a JED period 1759.6510260 4.82 n/a n/a d yr n 0.20458602 n/a deg/d Q 3.3720917 n/a AU   Orbit Determination Parameters    # obs. used (total)      728      first obs. used      1955-??-??      last obs. used      2013-03-09      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.51      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.243  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.80 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15 diameter diameter 29.32 km 2.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15 rotation period rot_per 5.552 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Shipley, H.; Dillard, A.; Kendall, J.; Reichert, M.; et al. (2008) Minor Planet Bul. 35, 99-101.] [Bennefeld, C.; Cantue, J.; Holly, V.; Jordon, L.; Martin, T.; Soar, E.; Swinney, T. (2009) Minor Planet Bul. 36, 45-48.] geometric albedo albedo 0.0392   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15 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) 3971 Voronikhin (1979 YM8)          Discovered 1979-Dec-23 by Zhuravleva, L. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1979 YM8 = 1940 WQ = 1955 YD = 1956 AJ1 = 1971 BF3 = 1974 XP = 1980 AD  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 17:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin