+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187063 (2005 MT31) Classification: Main-belt Asteroid          SPK-ID: 2187063 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2064234415130359 6.8108e-08   a 2.324190023649878 1.6147e-08 au q 1.844422720237806 1.5094e-07 au i 5.847385778308717 5.9297e-06 deg node 138.0745748253974 6.1965e-05 deg peri 217.7073251158687 6.3903e-05 deg M 89.37934737860074 2.0153e-05 deg tp 2458879.177931258008 (2020-Jan-30.67793126) 7.0313e-05 TDB period 1294.213351739156 3.54 1.3487e-05 3.693e-08 d yr n .2781612471515877 2.8987e-09 deg/d Q 2.80395732706195 1.948e-08 au   Orbit Determination Parameters    # obs. used (total)      248      data-arc span      8191 days (22.43 yr)      first obs. used      1998-08-17      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .62316      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 11:55:59   Additional Information  Earth MOID = .84173 au   Jupiter MOID = 2.64047 au   T_jup = 3.540  [ 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 17.0   n/a MPO436925   diameter diameter 2.328 km 0.580 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.047   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   187063 (2005 MT31)          Discovered 2005-Jun-28 by Spacewatch at Kitt Peak Reference: 20080520/Numbers.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 04:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin