+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18012 Marsland (1999 JM114) Classification: Main-belt Asteroid          SPK-ID: 2018012 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1138638405771139 3.5858e-08   a 2.318605787599862 6.5264e-09 au q 2.054600427839418 8.4376e-08 au i 5.157748068011855 3.5951e-06 deg node 236.5732929381563 3.4239e-05 deg peri 346.1377793718241 3.6941e-05 deg M 355.0201737510756 1.3037e-05 deg tp 2459018.338177847867 (2020-Jun-17.83817785) 4.6688e-05 TDB period 1289.551824547883 3.53 5.4447e-06 1.491e-08 d yr n .2791667563466989 1.1787e-09 deg/d Q 2.582611147360307 7.2695e-09 au   Orbit Determination Parameters    # obs. used (total)      2536      data-arc span      11868 days (32.49 yr)      first obs. used      1988-03-10      last obs. used      2020-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46472      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:17:28   Additional Information  Earth MOID = 1.04605 au   Jupiter MOID = 2.39928 au   T_jup = 3.565  [ 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 14.03   n/a E2021B10   diameter diameter 3.870 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.356   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18012 Marsland           Discovered 1999 May 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Kyle Anthony Marsland (b. 1985) was awarded first place in the 2003 Intel International Science and Engineering Fair for his environmental science team project. He also received the MILSET Expo-Sciences International Award. He attends the Hamilton High School, Chandler, Arizona, 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: 20040614/MPCPages.arc Last Updated: 2009-12-11 [ show close-approach data ] Alternate Designations  1999 JM114 = 1988 ET2 = 1992 LM1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 20:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin