+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .205582788422201 2.978e-08   a 2.797412881509653 1.1765e-08 au q 2.222312940960714 8.2617e-08 au i 7.417896632654266 4.0392e-06 deg node 192.4449826414333 2.7082e-05 deg peri 244.3534036374591 2.9079e-05 deg M 312.2627115348604 1.2428e-05 deg tp 2459623.114935036538 (2022-Feb-12.61493504) 5.9666e-05 TDB period 1708.965448943105 4.68 1.0781e-05 2.952e-08 d yr n .2106537614453463 1.3289e-09 deg/d Q 3.372512822058591 1.4184e-08 au   Orbit Determination Parameters    # obs. used (total)      1854      data-arc span      24459 days (66.97 yr)      first obs. used      1954-07-02      last obs. used      2021-06-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46516      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 14:22:54   Additional Information  Earth MOID = 1.24899 au   Jupiter MOID = 1.97015 au   T_jup = 3.283  [ 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 13.53   n/a MPCxxxxx   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-Aug-02 07:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin