+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249297 (2008 TL169) Classification: Main-belt Asteroid          SPK-ID: 2249297 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1495153524496808 9.4617e-08   a 3.104906077945965 3.6238e-08 au q 2.640674951378717 2.9991e-07 au i 16.17561704088586 6.9152e-06 deg node 275.2474663690522 2.4668e-05 deg peri 250.1979615016924 3.7608e-05 deg M 349.7145611892109 2.4891e-05 deg tp 2459057.594129032324 (2020-Jul-27.09412903) 0.00013849 TDB period 1998.34803645679 5.47 3.4985e-05 9.578e-08 d yr n .1801487996246665 3.1539e-09 deg/d Q 3.569137204513212 4.1656e-08 au   Orbit Determination Parameters    # obs. used (total)      246      data-arc span      5802 days (15.89 yr)      first obs. used      2004-03-15      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5349      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 10:21:41   Additional Information  Earth MOID = 1.70186 au   Jupiter MOID = 1.77529 au   T_jup = 3.143  [ 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 15.6   n/a MPO281360   diameter diameter 5.155 km 0.278 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.042   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   249297 (2008 TL169)          Discovered 2008-Oct-07 by Mt. Lemmon Survey at Mount Lemmon Reference: 20100824/Numbers.arc Last Updated: 2010-08-27 [ show close-approach data ] Alternate Designations  2008 TL169 = 2004 EA57  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-12 12:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin