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9197 Endo (1992 WH8)
Classification: Main-belt Asteroid          SPK-ID: 2009197
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1106625149643796 4.0769e-08  
a 2.16357220761787 5.9361e-09 au
q 1.924145865815842 8.8851e-08 au
i 1.000241324447465 4.194e-06 deg
node 2.183564385615079 0.00018053 deg
peri 329.196027757568 0.00018103 deg
M 303.6367147016468 1.2881e-05 deg
tp 2459182.490750704672
(2020-Nov-28.99075070)
4.1666e-05 TDB
period 1162.399776856092
3.18
4.7838e-06
1.31e-08
d
yr
n .3097041200177114 1.2746e-09 deg/d
Q 2.402998549419899 6.593e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1990  
   data-arc span      23452 days (64.21 yr)  
   first obs. used      1956-05-08  
   last obs. used      2020-07-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53296  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:05:41  

Additional Information
 Earth MOID = .913433 au 
 Jupiter MOID = 2.87804 au 
 T_jup = 3.687 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO328782  
diameter diameter 3.174 km 0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.211   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9197 Endo           Discovered 1992 Nov. 24 by M. Hirasawa and S. Suzuki at Nyukasa.
Named in honor of Shu Endo (b. 1953), one of Japan's leading astrophotographers. Endo's astrophotographs are famous for their beauty and detail. Many astrophotographers have been inspired by his ideas and advice. The films used to discover this minor planet were hypersensitized by him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1992 WH8 = 1976 UA20 = 1979 SL5 = 1979 US2 = 1995 TA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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