+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21647 Carlturner (1999 NE54) Classification: Main-belt Asteroid          SPK-ID: 2021647 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0824753416901826 3.2093e-08   a 2.66282394773411 1.2825e-08 au q 2.443206632783939 9.0118e-08 au i 10.42828529785087 4.2066e-06 deg node 191.9632865143654 2.1154e-05 deg peri 144.655949875999 3.611e-05 deg M 314.0384878309794 3.0007e-05 deg tp 2459403.130080083352 (2021-Jul-07.63008008) 0.00013261 TDB period 1587.128564476932 4.35 1.1466e-05 3.139e-08 d yr n .2268247248883992 1.6387e-09 deg/d Q 2.882441262684282 1.3883e-08 au   Orbit Determination Parameters    # obs. used (total)      1282      data-arc span      9589 days (26.25 yr)      first obs. used      1994-06-07      last obs. used      2020-09-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4928      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:55:44   Additional Information  Earth MOID = 1.44136 au   Jupiter MOID = 2.43696 au   T_jup = 3.356  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.52   n/a E2021B10   diameter diameter 8.580 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.042   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21647 Carlturner           Discovered 1999 July 12 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Carl Anthony Turner (b. 1989) was awarded first place in the 2006 Intel International Science and Engineering Fair for his engineering project. He attends the New Prague Senior High School, New Prague, Minnesota, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060711/MPCPages.arc Last Updated: 2006-07-17 Alternate Designations  1999 NE54 = 1998 HP46  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-10 19:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin