+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15023 Ketover (1998 SP156) Classification: Main-belt Asteroid          SPK-ID: 2015023 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1490442087963374 2.7785e-08   a 2.334052723380845 6.8081e-09 au q 1.986175681935611 6.3628e-08 au i 1.838732639714947 3.8557e-06 deg node 269.7760089817254 0.00014028 deg peri 148.0031150938729 0.00014161 deg M 50.00031058733281 1.8676e-05 deg tp 2459019.601643527025 (2020-Jun-19.10164353) 6.7344e-05 TDB period 1302.460076053395 3.57 5.6986e-06 1.56e-08 d yr n .27640002685598 1.2093e-09 deg/d Q 2.68192976482608 7.8228e-09 au   Orbit Determination Parameters    # obs. used (total)      1134      data-arc span      12229 days (33.48 yr)      first obs. used      1987-09-18      last obs. used      2021-03-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49371      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:45:21   Additional Information  Earth MOID = .997889 au   Jupiter MOID = 2.63552 au   T_jup = 3.553  [ 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 15.6   n/a MPO250360   diameter diameter 2.395 km 0.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.194   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15023 Ketover           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Daniel Jacob Ketover (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for his physics project. He attends the Syosset High School, Syosset, New York. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030216/MPCPages.arc Last Updated: 2011-11-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 00:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin