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8735 Yoshiosakai (1997 AA1)
Classification: Main-belt Asteroid          SPK-ID: 2008735
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2128319399759286 3.9386e-08  
a 3.195347937673326 1.461e-08 au
q 2.515275837200229 1.25e-07 au
i 1.940513352267076 3.8599e-06 deg
node 50.86045761365818 0.00012777 deg
peri 341.5281821314928 0.00012806 deg
M 156.94958151214 1.0139e-05 deg
tp 2458486.935879435495
(2019-Jan-03.43587944)
5.5846e-05 TDB
period 2086.294721199332
5.71
1.4308e-05
3.917e-08
d
yr
n .1725547193030569 1.1834e-09 deg/d
Q 3.875420038146422 1.7719e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2224  
   data-arc span      17781 days (48.68 yr)  
   first obs. used      1972-10-06  
   last obs. used      2021-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:51:42  

Additional Information
 Earth MOID = 1.52079 au 
 Jupiter MOID = 1.56869 au 
 T_jup = 3.159 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457079.5 (2015-Feb-26.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2100014730048503 3.9161e-08  
q 2.528197363023293 1.2401e-07 au
tp 2456400.573742161964
(2013-Apr-18.07374216)
5.2843e-05 TDB
node 50.91105717790048 0.00012778 deg
peri 341.8981679984374 0.00012809 deg
i 1.939971561093127 3.8546e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2224  
   data-arc span      17781 days (48.68 yr)  
   first obs. used      1972-10-06  
   last obs. used      2021-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:51:42  

Additional Information
 Jupiter MOID = 1.56869 au 
 T_jup = 3.159 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.533567384887323E-15 -4.836146897279257E-15 -3.957357364225259E-13 4.58797162910889E-15 -1.23234138341946E-13 -3.754674743455834E-17
q -4.836146897279257E-15 1.537966775854747E-14 1.337081939174427E-12 -1.418143870267793E-14 4.085398674236732E-13 1.535645961615333E-16
tp -3.957357364225259E-13 1.337081939174427E-12 2.792343992612208E-9 5.483833579375817E-12 4.914290051647164E-10 -4.5707959917055E-13
node 4.58797162910889E-15 -1.418143870267793E-14 5.483833579375817E-12 1.632876540162481E-8 -1.631836248999803E-8 -1.525641135029104E-10
peri -1.23234138341946E-13 4.085398674236732E-13 4.914290051647164E-10 -1.631836248999803E-8 1.640612938146718E-8 1.524176779655171E-10
i -3.754674743455834E-17 1.535645961615333E-16 -4.5707959917055E-13 -1.525641135029104E-10 1.524176779655171E-10 1.485757673276767E-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 13.04   n/a E2021B10  
diameter diameter 13.208 km 0.401 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8735 Yoshiosakai           Discovered 1997 Jan. 2 by T. Kobayashi at Oizumi.
Sakai Yoshio (1923-2002) is a pioneer in building astronomical observatories for the general public. He established the Hidahiko Tenmondai at his own expense. He also toiled as director of Ogawa Astronomical Observatory (founded in 1991), contributing much to education in astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061109/MPCPages.arcLast Updated: 2006-11-13

[ show close-approach data ]
Alternate Designations
 1997 AA1 = 1972 TR1 = 1978 TZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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