+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .205739053838942 3.0019e-08   a 2.799572759777599 1.2269e-08 au q 2.22359130902768 8.3015e-08 au i 7.413438579680887 4.0382e-06 deg node 192.4673094478377 2.7282e-05 deg peri 244.1329763596686 2.928e-05 deg M 271.2055100887833 1.2464e-05 deg tp 2459622.506928746414 (2022-Feb-12.00692875) 6.0578e-05 TDB period 1710.945065404537 4.68 1.1247e-05 3.079e-08 d yr n .2104100285153699 1.3832e-09 deg/d Q 3.375554210527519 1.4793e-08 au   Orbit Determination Parameters    # obs. used (total)      1845      data-arc span      24278 days (66.47 yr)      first obs. used      1954-07-02      last obs. used      2020-12-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46294      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:14:42   Additional Information  Earth MOID = 1.24989 au   Jupiter MOID = 1.9672 au   T_jup = 3.282  [ 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 13.52   n/a E2020-QM5   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-Apr-20 01:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin