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6868 Seiyauyeda (1992 HD)
Classification: Main-belt Asteroid          SPK-ID: 2006868
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1505599642276271 3.6184e-08  
a 2.659475727859838 9.1075e-09 au
q 2.259065157409018 9.5884e-08 au
i 3.378640702146531 3.2777e-06 deg
node 120.0389446823652 6.7997e-05 deg
peri 84.60590807520272 6.8817e-05 deg
M 180.3485658136042 1.2477e-05 deg
tp 2459791.034196632317
(2022-Jul-30.53419663)
5.6472e-05 TDB
period 1584.136035854619
4.34
8.1374e-06
2.228e-08
d
yr
n .2272532104894546 1.1674e-09 deg/d
Q 3.059886298310658 1.0479e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2566  
   data-arc span      42222 days (115.60 yr)  
   first obs. used      1905-03-26  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44136  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:32:28  

Additional Information
 Earth MOID = 1.25834 au 
 Jupiter MOID = 1.90333 au 
 T_jup = 3.368 
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Orbital Elements at Epoch 2456976.5 (2014-Nov-15.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1497842094466261 3.6277e-08  
q 2.262301460102969 9.6137e-08 au
tp 2456622.790173387376
(2013-Nov-26.29017339)
5.2192e-05 TDB
node 120.0791984333509 6.8026e-05 deg
peri 84.8465247161526 6.8855e-05 deg
i 3.37753344957356 3.2764e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2566  
   data-arc span      42222 days (115.60 yr)  
   first obs. used      1905-03-26  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44136  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:32:28  

Additional Information
 Jupiter MOID = 1.90333 au 
 T_jup = 3.368 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.316039210792153E-15 -3.476212016648959E-15 -2.345166772822208E-13 -5.630834376789476E-15 -4.131286650520523E-14 8.791299041649012E-18
q -3.476212016648959E-15 9.242404575373676E-15 6.747210583692272E-13 1.662724815484429E-14 1.197003640439669E-13 5.595018997548019E-17
tp -2.345166772822208E-13 6.747210583692272E-13 2.724004901781545E-9 4.148437719788894E-12 5.817433997493782E-10 -2.032344635931734E-13
node -5.630834376789476E-15 1.662724815484429E-14 4.148437719788894E-12 4.62759573703016E-9 -4.618058767315776E-9 3.832876665304485E-11
peri -4.131286650520523E-14 1.197003640439669E-13 5.817433997493782E-10 -4.618058767315776E-9 4.741030156309742E-9 -3.829672551402048E-11
i 8.791299041649012E-18 5.595018997548019E-17 -2.032344635931734E-13 3.832876665304485E-11 -3.829672551402048E-11 1.073467521527854E-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 12.8   n/a MPO347580  
diameter diameter 14.401 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6868 Seiyauyeda           Discovered 1992 Apr. 22 by Y. Kushida and O. Muramatsu at the Yatsugatake South Base Observatory.
Seiya Uyeda (b. 1929), a professor emeritus at Tokyo University, has greatly contributed to the study of geophysics and electromagnetic earthquake prediction.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1992 HD = 1973 YU3 = 1976 SN9 = 1979 HR4 = A905 FA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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