+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   15421 Adammalin (1998 HM81) Classification: Main-belt Asteroid          SPK-ID: 2015421 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO169609 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0745676 n/a   a 2.8911432 n/a AU q 2.6755576 n/a AU i 2.78016 n/a deg node 55.83228 n/a deg peri 280.50379 n/a deg M 20.91467 n/a deg tp 2455096.1838987 (2009-Sep-21.68389870) n/a JED period 1795.5720296 4.92 n/a n/a d yr n 0.20049321 n/a deg/d Q 3.1067288 n/a AU   Orbit Determination Parameters    # obs. used (total)      540      first obs. used      1995-??-??      last obs. used      2009-09-20      # oppositions      12      planetary ephem.      DE403      quality code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.285  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.4 mag n/a PDS3 (MPO 885)   15421 Adammalin           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Adam Mikah Malin (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for his behavioral and social sciences 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: 2003-10-02 Alternate Designations  1998 HM81 = 1996 BL13 = 1999 NX37 = 1999 PO8  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 05:49 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin