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20120 Ryugatake (1995 WB5)
Classification: Main-belt Asteroid          SPK-ID: 2020120
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1547571119943351 3.9105e-08  
a 2.632636424396108 1.2597e-08 au
q 2.225217214425473 1.0434e-07 au
i 12.79626558005466 4.7953e-06 deg
node 253.612684370264 1.8313e-05 deg
peri 95.85042528900371 2.3648e-05 deg
M 327.4125713874338 1.6201e-05 deg
tp 2459141.731752301142
(2020-Oct-19.23175230)
7.064e-05 TDB
period 1560.216101518524
4.27
1.1199e-05
3.066e-08
d
yr
n .2307372675167368 1.6561e-09 deg/d
Q 3.040055634366742 1.4547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1199  
   data-arc span      8968 days (24.55 yr)  
   first obs. used      1995-11-17  
   last obs. used      2020-06-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54323  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:39:17  

Additional Information
 Earth MOID = 1.26362 au 
 Jupiter MOID = 2.48357 au 
 T_jup = 3.347 
[ 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 14.2   n/a MPO474030  
diameter diameter 4.825 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.209   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20120 Ryugatake           Discovered 1995 Nov. 24 by T. Kobayashi at Oizumi.
Ryugatake is a town in Kumamoto, on the east coast of the beautiful Amakusa-Kamishima Island. It is also the name of the mountain where Myu-i public observatory is located.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1995 WB5 = 1998 KC66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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