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21250 Kamikouchi (1995 YQ2)
Classification: Main-belt Asteroid          SPK-ID: 2021250
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1262675692965873 4.915e-08  
a 2.728328398142634 1.5569e-08 au
q 2.383829003066312 1.365e-07 au
i 12.39255661727619 4.5519e-06 deg
node 68.1509977403776 2.1283e-05 deg
peri 314.9872949877398 2.6555e-05 deg
M 229.5059912160493 1.7843e-05 deg
tp 2459797.166237879143
(2022-Aug-05.66623788)
8.4176e-05 TDB
period 1646.051398360517
4.51
1.409e-05
3.858e-08
d
yr
n .2187051998246005 1.8721e-09 deg/d
Q 3.072827793218956 1.7535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      971  
   data-arc span      8927 days (24.44 yr)  
   first obs. used      1995-12-17  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52722  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:13:20  

Additional Information
 Earth MOID = 1.4053 au 
 Jupiter MOID = 2.38522 au 
 T_jup = 3.310 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.76   n/a E2021B10  
diameter diameter 2.852 km 0.559 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.344   0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21250 Kamikouchi           Discovered 1995 Dec. 17 by N. Sato at Chichibu.
Kamikouchi is a Japanese scenic point nominated as a "Special Natural Treasure" in 1952. Kamikouchi was introduced to the world in Mountaineering and Exploration in the Japanese Alps, published in London in 1896 and written by Walter Weston (1861-1940), a British clergyman and a mountaineer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050523/MPCPages.arcLast Updated: 2005-07-21

Alternate Designations
 1995 YQ2 = 2000 WU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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