+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1353 Maartje (1935 CU) Classification: Main-belt Asteroid          SPK-ID: 2001353 [ 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 .09528183653053776 5.2815e-08   a 3.009117071165218 1.819e-08 AU q 2.722402870289203 1.6081e-07 AU i 9.203187585314287 6.4944e-06 deg node 211.8090436999517 3.5667e-05 deg peri 99.06275914692841 4.9333e-05 deg M 191.5799288554605 3.4986e-05 deg tp 2457292.466203539196 (2015-Sep-26.96620354) 0.0001867 JED period 1906.588870862864 5.22 1.7288e-05 4.733e-08 d yr n .1888188929987172 1.7121e-09 deg/d Q 3.295831272041232 1.9923e-08 AU   Orbit Determination Parameters    # obs. used (total)      1410      data-arc span      33944 days (92.93 yr)      first obs. used      1920-05-09      last obs. used      2013-04-15      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56673      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:43:45   Additional Information  Earth MOID = 1.7282 AU   T_jup = 3.224  [ 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 10.40 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 diameter diameter 33.75 km 3.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 rotation period rot_per 22.98 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: [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.1073   0.030 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 1353 Maartje (1935 CU)          Discovered 1935-Feb-13 by Van Gent, H. at Johannesburg (LS) Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1935 CU = 1931 ME = 1953 TZ2 = A910 LB = A916 QB = A920 JC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-24 18:29 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin