+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1470291173097029 3.5288e-08   a 2.433797721560868 8.6488e-09 au q 2.075958590849407 8.786e-08 au i 7.143790532648975 3.392e-06 deg node 88.01713867539677 3.1568e-05 deg peri 264.7443700802334 3.3979e-05 deg M 226.3052787984427 1.4705e-05 deg tp 2459515.535193457443 (2021-Oct-28.03519346) 5.8072e-05 TDB period 1386.836129192808 3.80 7.3925e-06 2.024e-08 d yr n .2595836612718865 1.3837e-09 deg/d Q 2.791636852272328 9.9204e-09 au   Orbit Determination Parameters    # obs. used (total)      2307      data-arc span      18927 days (51.82 yr)      first obs. used      1968-10-23      last obs. used      2020-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4551      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:25:44   Additional Information  Earth MOID = 1.08519 au   Jupiter MOID = 2.65173 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 13.4   n/a MPO502226   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-Jan-21 18:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin