+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1565 Lemaitre (1948 WA) Classification: Mars-crossing Asteroid          SPK-ID: 2001565 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3482277674846967 3.4446e-08   a 2.392322166176917 7.1648e-09 au q 1.559249159144976 8.3421e-08 au i 21.49565911039046 4.0765e-06 deg node 261.1476024735706 1.2221e-05 deg peri 116.3963931981799 1.3645e-05 deg M 142.4977594316242 7.3552e-06 deg tp 2458465.525035912789 (2018-Dec-13.02503591) 2.6479e-05 TDB period 1351.536949349779 3.70 6.0716e-06 1.662e-08 d yr n .2663634169773865 1.1966e-09 deg/d Q 3.225395173208859 9.6598e-09 au   Orbit Determination Parameters    # obs. used (total)      2619      data-arc span      26130 days (71.54 yr)      first obs. used      1948-11-25      last obs. used      2020-06-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .34477      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:33:04   Additional Information  Earth MOID = .67242 au   Jupiter MOID = 2.55593 au   T_jup = 3.358  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.66   n/a E2021B10   diameter diameter 7.949 km 1.558 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   rotation period rot_per 11.403 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Warner, B.D.; Vander Haagen, G. (2008) Minor Planet Bull. 35, 52.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.] geometric albedo albedo 0.239   0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   SMASSII spectral type spec_B Sq   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) 1565 Lemaitre (1948 WA)          Discovered 1948-Nov-25 by Arend, S. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 07:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin