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6444 Ryuzin (1989 WW)
Classification: Mars-crossing Asteroid          SPK-ID: 2006444
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3059620471206497 3.8828e-08  
a 2.228951443150109 9.9575e-09 au
q 1.546976896671376 8.8128e-08 au
i 6.056765202460631 5.1104e-06 deg
node 98.09395078752107 4.1644e-05 deg
peri 268.9292697485318 4.2658e-05 deg
M 36.61160920181754 1.1268e-05 deg
tp 2457476.886570498233
(2016-Mar-29.38657050)
3.7599e-05 JED
period 1215.484257338429
3.33
8.145e-06
2.23e-08
d
yr
n .2961782498016875 1.9847e-09 deg/d
Q 2.910925989628843 1.3004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      13055 days (35.74 yr)  
   first obs. used      1979-11-16  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54252  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:19:09  

Additional Information
 Earth MOID = .560177 au 
 Jupiter MOID = 2.56392 au 
 T_jup = 3.574 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO344353  
rotation period rot_per 7.9290 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2010) Minor Planet Bul. 37, 57-64.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

6444 Ryuzin           Discovered 1989 Nov. 20 by K. Suzuki and T. Urata at Toyota.
Ryuzin is a small town within Toyota city, Aichi prefecture, Japan. The town name, derived from Japanese words meaning `Dragon' and `God', originated from an ancient belief that people saw tornadoes as dragons. Name suggested by junior high school student K. Takagi.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-06-02Last Updated: 2015-06-04

[ show close-approach data ]
Alternate Designations
 1989 WW = 1969 VB3 = 1979 WD3 = 1979 YP6 = 1986 YO 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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