+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08241422124173091 3.2019e-08   a 2.663241834339614 1.3141e-08 au q 2.443752832584116 8.9948e-08 au i 10.43262287229454 4.1884e-06 deg node 191.9173535270702 2.1068e-05 deg peri 144.3340517842943 3.5918e-05 deg M 358.8042494476642 2.9901e-05 deg tp 2459401.772935056635 (2021-Jul-06.27293506) 0.00013186 TDB period 1587.502189884657 4.35 1.175e-05 3.217e-08 d yr n .2267713407224694 1.6785e-09 deg/d Q 2.882730836095113 1.4225e-08 au   Orbit Determination Parameters    # obs. used (total)      1302      data-arc span      9873 days (27.03 yr)      first obs. used      1994-06-07      last obs. used      2021-06-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50024      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 14:04:08   Additional Information  Earth MOID = 1.44297 au   Jupiter MOID = 2.43416 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-Jul-31 06:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin