+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22260 Ur (1979 UR) Classification: Main-belt Asteroid          SPK-ID: 2022260 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1521058417243617 4.6026e-08   a 2.64222082100503 1.4721e-08 au q 2.240323599004426 1.2389e-07 au i 6.147373888145391 5.0824e-06 deg node 13.54210325526257 3.4605e-05 deg peri 347.0955138035049 3.6622e-05 deg M 233.4266252216547 1.527e-05 deg tp 2459752.058969584278 (2022-Jun-21.55896958) 6.9355e-05 TDB period 1568.744053779553 4.29 1.311e-05 3.589e-08 d yr n .229482941549743 1.9179e-09 deg/d Q 3.044118043005634 1.696e-08 au   Orbit Determination Parameters    # obs. used (total)      1316      data-arc span      14826 days (40.59 yr)      first obs. used      1979-10-19      last obs. used      2020-05-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50779      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:02:54   Additional Information  Earth MOID = 1.2363 au   Jupiter MOID = 2.40825 au   T_jup = 3.370  [ 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 14.4   n/a MPO467972   diameter diameter 9.731 km 0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.039   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22260 Ur           Discovered 1979 Oct. 19 by A. Mrkos at Klet. Ur was an important city of ancient southern Mesopotamia (Sumer), situated near the Euphrates River. The excavations at Ur discovered architectural monuments, including the ziggurat, and they greatly enlarged our knowledge of Mesopotamian history. The name was suggested by J. Ticha. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010509/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  1979 UR = 1994 CN11  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 02:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin