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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1503575993839719 2.4404e-08  
a 2.660020307731523 8.7963e-09 au
q 2.260066039948397 6.5304e-08 au
i 3.378634231956897 4.3527e-07 deg
node 120.0382279360677 1.4164e-05 deg
peri 84.56403016124264 1.6279e-05 deg
M 225.8400532882737 1.0335e-05 deg
tp 2459791.035800822966
(2022-Jul-30.53580082)
4.698e-05 TDB
period 1584.62263519732
4.34
7.8602e-06
2.152e-08
d
yr
n .2271834265166685 1.1269e-09 deg/d
Q 3.059974575514649 1.0119e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2848  
   data-arc span      42356 days (115.96 yr)  
   first obs. used      1905-03-26  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42848  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 19:10:32  

Additional Information
 Earth MOID = 1.2585 au 
 Jupiter MOID = 1.9021 au 
 T_jup = 3.367 
[ 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 12.86   n/a E2021B10  
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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