+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1462 Zamenhof (1938 CA) Classification: Main-belt Asteroid          SPK-ID: 2001462 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ 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 .1088436666647248 6.4434e-08   a 3.148196754336838 2.4757e-08 AU q 2.805535476212831 2.0506e-07 AU i .9676139064137007 6.88e-06 deg node 24.77915483148596 0.00033595 deg peri 188.6787240158047 0.00033771 deg M 83.53676701313542 2.6774e-05 deg tp 2455927.058428005418 (2011-Dec-31.55842801) 0.00015157 JED period 2040.286834313919 5.59 2.4067e-05 6.589e-08 d yr n .1764457790666752 2.0814e-09 deg/d Q 3.490858032460845 2.7452e-08 AU   Orbit Determination Parameters    # obs. used (total)      1434      data-arc span      27493 days (75.27 yr)      first obs. used      1938-01-07      last obs. used      2013-04-16      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .55301      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:44:40   Additional Information  Earth MOID = 1.79947 AU   T_jup = 3.199  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 10.80 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 diameter diameter 25.82 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 rotation period rot_per 10.4 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Menke, J.; Cooney, W.; Gross, J.; Terrell, D. (2008) Minor Planet Bul. 35, 155-160.] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.1268   0.019 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 1462 Zamenhof (1938 CA)          Discovered 1938-Feb-06 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1938 CA = 1963 TS = 1964 VF2 = 1969 TU5  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-26 03:51 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin