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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543261887277201 3.7084e-08  
a 2.631485982550999 9.7366e-09 au
q 2.225378780173484 1.0077e-07 au
i 12.79536400686698 2.9925e-06 deg
node 253.6020665407034 1.6788e-05 deg
peri 95.93293136164887 2.0288e-05 deg
M 58.77023160762699 9.6929e-06 deg
tp 2459141.960656440025
(2020-Oct-19.46065644)
4.2184e-05 TDB
period 1559.193509621952
4.27
8.6536e-06
2.369e-08
d
yr
n .2308885957890417 1.2814e-09 deg/d
Q 3.037593184928514 1.1239e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1848  
   data-arc span      9215 days (25.23 yr)  
   first obs. used      1995-11-17  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47911  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:18:55  

Additional Information
 Earth MOID = 1.26302 au 
 Jupiter MOID = 2.48413 au 
 T_jup = 3.348 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457694.5 (2016-Nov-02.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1556862337063916 3.703e-08  
q 2.221923695692113 1.0087e-07 au
tp 2457584.656938969039
(2016-Jul-15.15693897)
4.4084e-05 TDB
node 253.6224556220884 1.6778e-05 deg
peri 96.37925352206504 2.0223e-05 deg
i 12.80021775844241 2.9939e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1848  
   data-arc span      9215 days (25.23 yr)  
   first obs. used      1995-11-17  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47911  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:18:55  

Additional Information
 Jupiter MOID = 2.48413 au 
 T_jup = 3.348 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.371220778099819E-15 -3.724122675727991E-15 2.821205051405798E-13 4.973095768353999E-15 8.08005659824086E-14 -7.833452744738455E-15
q -3.724122675727991E-15 1.017457487077533E-14 -8.760692105295549E-13 -1.33197201295945E-14 -2.459733448945241E-13 2.155953811940871E-14
tp 2.821205051405798E-13 -8.760692105295549E-13 1.943432122789445E-9 -3.868765394495018E-12 5.130196591624512E-10 -1.279476025485364E-12
node 4.973095768353999E-15 -1.33197201295945E-14 -3.868765394495018E-12 2.814956290905917E-10 -2.754861531012731E-10 -2.045164656895339E-12
peri 8.08005659824086E-14 -2.459733448945241E-13 5.130196591624512E-10 -2.754861531012731E-10 4.089804386336818E-10 1.631498408818149E-12
i -7.833452744738455E-15 2.155953811940871E-14 -1.279476025485364E-12 -2.045164656895339E-12 1.631498408818149E-12 8.963330433780671E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.27   n/a E2021B10  
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

Alternate Designations
 1995 WB5 = 1998 KC66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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