+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .20392647300325 1.9157e-08   a 2.372353372457943 8.2664e-09 au q 1.888567716495229 4.5418e-08 au i 7.870098059809393 7.9944e-07 deg node 327.777474013578 5.6605e-06 deg peri 262.88239865 8.4243e-06 deg M 243.0129792391301 6.0331e-06 deg tp 2459634.213236579105 (2022-Feb-23.71323658) 2.374e-05 TDB period 1334.650324052895 3.65 6.9758e-06 1.91e-08 d yr n .2697335725411569 1.4098e-09 deg/d Q 2.856139028420657 9.9521e-09 au   Orbit Determination Parameters    # obs. used (total)      2410      data-arc span      25217 days (69.04 yr)      first obs. used      1952-02-28      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4373      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:11:16   Additional Information  Earth MOID = .896992 au   Jupiter MOID = 2.20842 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 13.48   n/a E2021B10   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 ] 2021-Apr-16 03:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin