+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2038195465493704 1.9008e-08   a 2.372418758224041 8.2678e-09 au q 1.888873442697597 4.5108e-08 au i 7.870254105684199 7.9935e-07 deg node 327.7765596911707 5.6592e-06 deg peri 262.8761996413774 8.4216e-06 deg M 295.8749967577057 6.1897e-06 deg tp 2459634.244429565651 (2022-Feb-23.74442957) 2.3717e-05 TDB period 1334.705502005867 3.65 6.9771e-06 1.91e-08 d yr n .2697224215071958 1.41e-09 deg/d Q 2.855964073750486 9.9529e-09 au   Orbit Determination Parameters    # obs. used (total)      2487      data-arc span      25295 days (69.25 yr)      first obs. used      1952-02-28      last obs. used      2021-05-31      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43478      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 03:57:13   Additional Information  Earth MOID = .898934 au   Jupiter MOID = 2.20742 au   T_jup = 3.503  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 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 Alternate Designations  1996 EL = 1952 DY = 1981 AR3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-02 04:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin