+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18725 Atacama (1998 JL3) Classification: Main-belt Asteroid          SPK-ID: 2018725 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1338344951154837 3.0885e-08   a 2.75806834167555 1.1199e-08 au q 2.388943657673403 8.3892e-08 au i 8.816397479770284 5.0362e-06 deg node 196.7774079148084 2.2314e-05 deg peri 245.3941332593476 3.0164e-05 deg M 80.4661668799581 1.9041e-05 deg tp 2458626.547212726476 (2019-May-23.04721273) 8.8545e-05 TDB period 1673.038602911249 4.58 1.019e-05 2.79e-08 d yr n .2151773422164708 1.3105e-09 deg/d Q 3.127193025677697 1.2697e-08 au   Orbit Determination Parameters    # obs. used (total)      2121      data-arc span      25299 days (69.26 yr)      first obs. used      1951-03-28      last obs. used      2020-07-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44409      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:13:15   Additional Information  Earth MOID = 1.42027 au   Jupiter MOID = 2.17943 au   T_jup = 3.313  [ 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 13.3   n/a MPO384914   diameter diameter 6.048 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.278   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18725 Atacama           Discovered 1998 May 2 by the OCA-DLR Asteroid Survey at Caussols. The Atacama desert, which covers regions II, III and IV of Chile, is one of the driest deserts on Earth. It contains many mineral resources, but also a number of very high-quality astronomical sites on which many modern instruments have been installed. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030614/MPCPages.arc Last Updated: 2005-04-26 Alternate Designations  1998 JL3 = 1999 RG111  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-22 15:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin