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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457002.5 (2014-Dec-11.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .145999148630673 3.5167e-08  
q 2.078885312089515 8.7476e-08 au
tp 2456738.051823599502
(2014-Mar-21.55182360)
5.2063e-05 TDB
node 88.14002514150144 3.1486e-05 deg
peri 264.0344309444126 3.395e-05 deg
i 7.146499048897527 3.3924e-06 deg
  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
 Jupiter MOID = 2.65131 au 
 T_jup = 3.480 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.236693520214636E-15 -3.065737906471425E-15 -1.22244108822796E-13 5.527828247072767E-15 -2.651750217512414E-14 1.039588914175446E-15
q -3.065737906471425E-15 7.652117652853422E-15 4.244413154233641E-13 -1.436991610459768E-14 9.701383687416141E-14 -2.336548482181535E-15
tp -1.22244108822796E-13 4.244413154233641E-13 2.71051474229927E-9 -1.256035202544896E-11 6.801804905338732E-10 1.542869538047759E-12
node 5.527828247072767E-15 -1.436991610459768E-14 -1.256035202544896E-11 9.913681570207102E-10 -9.86229896855088E-10 -7.526872697426626E-12
peri -2.651750217512414E-14 9.701383687416141E-14 6.801804905338732E-10 -9.86229896855088E-10 1.152592660798713E-9 7.828783291415262E-12
i 1.039588914175446E-15 -2.336548482181535E-15 1.542869538047759E-12 -7.526872697426626E-12 7.828783291415262E-12 1.150832326657171E-11

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.arcLast 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 ]
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