+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249078 (2007 UR128) Classification: Main-belt Asteroid          SPK-ID: 2249078 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1939910892122945 3.991e-08   a 2.289629100292135 1.6075e-08 au q 1.845461457234298 8.5667e-08 au i 10.44213628322841 4.0484e-06 deg node 72.56724591988122 2.8119e-05 deg peri 176.9278265594409 3.0999e-05 deg M 38.64579708592792 1.4029e-05 deg tp 2458864.654298880943 (2020-Jan-16.15429888) 4.9176e-05 TDB period 1265.453324565222 3.46 1.3326e-05 3.648e-08 d yr n .2844830330851491 2.9959e-09 deg/d Q 2.733796743349972 1.9193e-08 au   Orbit Determination Parameters    # obs. used (total)      349      data-arc span      6818 days (18.67 yr)      first obs. used      2002-03-10      last obs. used      2020-11-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52259      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 05:41:37   Additional Information  Earth MOID = .831464 au   Jupiter MOID = 2.30405 au   T_jup = 3.553  [ 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 17.1   n/a MPO427414   diameter diameter 2.012 km 0.472 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.058   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   249078 (2007 UR128)          Discovered 2007-Oct-20 by Mt. Lemmon Survey at Mount Lemmon Reference: 20100824/Numbers.arc Last Updated: 2010-08-27 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 09:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin