+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1483 Hakoila (1938 DJ1) Classification: Main-belt Asteroid          SPK-ID: 2001483 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1777595561712724 3.2376e-08   a 2.719983380959815 8.7707e-09 au q 2.236480342367162 8.7045e-08 au i 4.490147728515715 3.2258e-06 deg node 71.85960751947746 4.6645e-05 deg peri 88.39781869222315 4.7561e-05 deg M 132.8922893203911 1.0754e-05 deg tp 2458395.653621174725 (2018-Oct-04.15362117) 4.7722e-05 TDB period 1638.505119376314 4.49 7.9251e-06 2.17e-08 d yr n .2197124657975018 1.0627e-09 deg/d Q 3.203486419552469 1.033e-08 au   Orbit Determination Parameters    # obs. used (total)      2782      data-arc span      24072 days (65.91 yr)      first obs. used      1954-12-21      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43263      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:00:54   Additional Information  Earth MOID = 1.25062 au   Jupiter MOID = 1.79261 au   T_jup = 3.332  [ 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 11.9   n/a MPO395005   diameter diameter 10.633 km 0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 239.1 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: [Polakis, T. (2019) Minor Planet Bull. 46, 400-406.] geometric albedo albedo 0.237   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   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) 1483 Hakoila (1938 DJ1)          Discovered 1938-Feb-24 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1938 DJ1 = 1929 CG = 1963 VK = 1975 QE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 05:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin