+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   7769 Okuni (1991 VF4) Classification: Main-belt Asteroid          SPK-ID: 2007769 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1470893434419693 3.5224e-08   a 2.434065709898052 8.5826e-09 au q 2.076040582734537 8.7741e-08 au i 7.143635144828962 3.3913e-06 deg node 88.01749865266984 3.1519e-05 deg peri 264.6884789727376 3.393e-05 deg M 278.2868645276633 1.4836e-05 deg tp 2459515.337350463341 (2021-Oct-27.83735046) 5.8039e-05 TDB period 1387.065194740612 3.80 7.3363e-06 2.009e-08 d yr n .2595407925777576 1.3727e-09 deg/d Q 2.792090837061567 9.845e-09 au   Orbit Determination Parameters    # obs. used (total)      2312      data-arc span      18927 days (51.82 yr)      first obs. used      1968-10-23      last obs. used      2020-08-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45467      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 20:01:23   Additional Information  Earth MOID = 1.08355 au   Jupiter MOID = 2.65131 au   T_jup = 3.480  [ 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 13.37   n/a E2021B10   diameter diameter 5.867 km 0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.295   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   7769 Okuni           Discovered 1991 Nov. 4 by S. Otomo at Kiyosato. Tomimaru Okuni (b. 1931), a retired teacher, is a Japanese amateur astronomer. He has been discovering new minor planets since 1995 at Nanyo in Yamagata prefecture. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010109/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  1991 VF4 = 1968 UY1 = 1972 XH = 1976 YO5 = 1980 XW2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-10 21:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin