+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15856 Yanokoji (1996 EL) Classification: Main-belt Asteroid          SPK-ID: 2015856 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2041261256159161 3.8237e-08   a 2.371969387224443 9.0353e-09 au q 1.887788466130758 8.955e-08 au i 7.869978521830388 4.8326e-06 deg node 327.7811825139428 2.8878e-05 deg peri 262.8887312594101 3.1241e-05 deg M 189.0581558775478 1.2721e-05 deg tp 2459634.089440280738 (2022-Feb-23.58944028) 4.7765e-05 TDB period 1334.32630069016 3.65 7.624e-06 2.087e-08 d yr n .2697990737451518 1.5416e-09 deg/d Q 2.856150308318127 1.088e-08 au   Orbit Determination Parameters    # obs. used (total)      2072      data-arc span      24997 days (68.44 yr)      first obs. used      1952-02-28      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45526      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:02:30   Additional Information  Earth MOID = .897425 au   Jupiter MOID = 2.20956 au   T_jup = 3.503  [ 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 13.4   n/a MPO452395   diameter diameter 6.069 km 0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.213   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15856 Yanokoji           Discovered 1996 Mar. 10 by K. Endate and K. Watanabe at Kitami. Koji Yano (b. 1964) is a well-known amateur astronomer in Ehime Prefecture. A skilled photographer of nebula and star clusters, he is highly regarded for the superior technique. He is a member of the Oriental Astronomical Association. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2015-06-02 Last Updated: 2015-06-04 [ show close-approach data ] Alternate Designations  1996 EL = 1952 DY = 1981 AR3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-24 04:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin