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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3060034573540328 3.8828e-08  
a 2.229090601587485 9.9097e-09 au
q 1.546981170746334 8.8125e-08 au
i 6.056739554657518 5.1103e-06 deg
node 98.09647114265907 4.1644e-05 deg
peri 268.9390537033261 4.2657e-05 deg
M 337.3716124931425 1.1056e-05 deg
tp 2457476.908401584366
(2016-Mar-29.40840158)
3.7598e-05 JED
period 1215.598087227202
3.33
8.1062e-06
2.219e-08
d
yr
n .2961505153575599 1.9749e-09 deg/d
Q 2.911200032428637 1.2942e-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 = .559544 au 
 Jupiter MOID = 2.56401 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. 2015-December); 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. (2015) 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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