+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   818 Kapteynia (1916 YZ) Classification: Main-belt Asteroid          SPK-ID: 2000818 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09544654854755442 7.7852e-08   a 3.168107959652721 2.2044e-08 AU q 2.865722989477834 2.4523e-07 AU i 15.66679203592266 8.547e-06 deg node 70.83180095107915 2.8202e-05 deg peri 293.4787596817598 4.8421e-05 deg M 188.4257042729724 4.1922e-05 deg tp 2457382.130649509565 (2015-Dec-25.63064951) 0.00024423 JED period 2059.673521176374 5.64 2.1497e-05 5.886e-08 d yr n .1747849823278728 1.8242e-09 deg/d Q 3.470492929827608 2.4148e-08 AU   Orbit Determination Parameters    # obs. used (total)      1134      data-arc span      35488 days (97.16 yr)      first obs. used      1916-02-21      last obs. used      2013-04-20      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56446      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:39:01   Additional Information  Earth MOID = 1.90926 AU   T_jup = 3.138  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.10 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 diameter diameter 49.45 km 3.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 rotation period rot_per 16.35 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Stephens, R.D. (2002) Minor Planet Bul. 29, 72-73.] [Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.1655   0.029 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 818 Kapteynia (1916 YZ)          Discovered 1916-Feb-21 by Wolf, M. at Heidelberg (024) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1916 YZ = 1929 JC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 14:56 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin