+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249237 (2008 HJ10) Classification: Jupiter Trojan          SPK-ID: 2249237 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1211168410407847 6.2619e-08   a 5.231946688140619 1.7636e-07 au q 4.598269832779232 4.4381e-07 au i 14.20216926872407 8.1137e-06 deg node 204.5850677622702 2.2141e-05 deg peri 87.86248798694001 4.3092e-05 deg M 288.7488041279894 4.0573e-05 deg tp 2459865.633340187826 (2022-Oct-13.13334019) 0.00051723 TDB period 4371.126668906378 11.97 0.00022102 6.051e-07 d yr n .08235862908316706 4.1643e-09 deg/d Q 5.865623543502006 1.9772e-07 au   Orbit Determination Parameters    # obs. used (total)      265      data-arc span      7178 days (19.65 yr)      first obs. used      2000-09-24      last obs. used      2020-05-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51938      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 00:19:20   Additional Information  Earth MOID = 3.62165 au   Jupiter MOID = .245711 au   T_jup = 2.924  [ 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 13.0   n/a MPO433633   diameter diameter 13.364 km 0.719 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   geometric albedo albedo 0.068   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   249237 (2008 HJ10)          Discovered 2008-Apr-24 by Mt. Lemmon Survey at Mount Lemmon Reference: 20100824/Numbers.arc Last Updated: 2010-08-27 Alternate Designations  2008 HJ10 = 2001 US172  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-23 05:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin