+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4354 Euclides (2142 P-L) Classification: Main-belt Asteroid          SPK-ID: 2004354 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2058970618731283 3.0199e-08   a 2.802148926016454 1.217e-08 au q 2.225194695218724 8.3684e-08 au i 7.405941055652845 4.0887e-06 deg node 192.6109122376703 2.7573e-05 deg peri 243.6798774513119 2.9578e-05 deg M 229.5556498571012 1.2357e-05 deg tp 2459621.309021189630 (2022-Feb-10.80902119) 6.0793e-05 TDB period 1713.307225521361 4.69 1.1162e-05 3.056e-08 d yr n .2101199333297924 1.3689e-09 deg/d Q 3.379103156814184 1.4676e-08 au   Orbit Determination Parameters    # obs. used (total)      1821      data-arc span      24244 days (66.38 yr)      first obs. used      1954-07-02      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46436      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:17:08   Additional Information  Earth MOID = 1.25178 au   Jupiter MOID = 1.96428 au   T_jup = 3.281  [ 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 13.5   n/a MPO302089   diameter diameter 12.339 km 0.282 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.051   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4354 Euclides (2142 P-L)          Discovered 1960-Sep-24 by van Houten and Gehrels at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  2142 P-L = 1971 BL2 = 1979 YO6 = 1983 RF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 22:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin