+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249362 (2008 YR137) Classification: Main-belt Asteroid          SPK-ID: 2249362 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06132859798539694 5.1657e-08   a 3.138425574516424 3.6796e-08 au q 2.945950334149817 1.7612e-07 au i 9.325015733571187 5.6398e-06 deg node 280.4261341280368 3.5062e-05 deg peri 359.7688413549021 5.9944e-05 deg M 291.2375898219697 5.0832e-05 deg tp 2459784.395523758953 (2022-Jul-23.89552376) 0.00028866 TDB period 2030.795433023362 5.56 3.5714e-05 9.778e-08 d yr n .1772704400186912 3.1175e-09 deg/d Q 3.33090081488303 3.9052e-08 au   Orbit Determination Parameters    # obs. used (total)      237      data-arc span      5374 days (14.71 yr)      first obs. used      2006-08-22      last obs. used      2021-05-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53121      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 04:26:29   Additional Information  Earth MOID = 1.92926 au   Jupiter MOID = 1.79712 au   T_jup = 3.188  [ 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 15.54   n/a E2021B55   diameter diameter 3.679 km 0.838 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.099   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   249362 (2008 YR137)          Discovered 2008-Dec-30 by Mt. Lemmon Survey at Mount Lemmon Reference: 20100824/Numbers.arc Last Updated: 2010-08-27 [ show close-approach data ] Alternate Designations  2008 YR137 = 2006 QU131  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Aug-02 13:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin