+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26092 Norikonoriyuki (1987 SF) Classification: Main-belt Asteroid          SPK-ID: 2026092 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2321225875034858 4.4257e-08   a 2.326055214851863 6.6018e-09 au q 1.786125259704472 1.0307e-07 au i 4.741765614215066 3.4589e-06 deg node 139.5415639266867 5.0823e-05 deg peri 243.6201790533096 5.1384e-05 deg M 117.2971485432229 6.1352e-06 deg tp 2458778.304684562495 (2019-Oct-21.80468456) 2.2339e-05 TDB period 1295.771597563557 3.55 5.5165e-06 1.51e-08 d yr n .2778267409757313 1.1828e-09 deg/d Q 2.865985169999254 8.1342e-09 au   Orbit Determination Parameters    # obs. used (total)      1426      data-arc span      12178 days (33.34 yr)      first obs. used      1987-09-22      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50455      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 03:17:37   Additional Information  Earth MOID = .794 au   Jupiter MOID = 2.60029 au   T_jup = 3.533  [ 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 14.96   n/a E2020-QM5   diameter diameter 3.108 km 0.476 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.220   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26092 Norikonoriyuki           Discovered 1987 Sept. 16 by T. Seki at Geisei. Noriko Shimizu (b. 1974) is a daughter of the discoverer. She and her husband, Noriyuki Shimizu (b. 1966), regularly participate in public viewing nights at Geisei Observatory. 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 2020-08-07 Last Updated: 2020-08-24 [ show close-approach data ] Alternate Designations  1987 SF = 1998 YJ1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin