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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3060236333172009 4.0122e-08  
a 2.228674089058402 1.0165e-08 AU
q 1.546647146844847 9.0555e-08 AU
i 6.0570669129418 5.2375e-06 deg
node 98.09584076834354 4.3902e-05 deg
peri 268.9784072229532 4.4932e-05 deg
M 218.8523575296362 1.0689e-05 deg
tp 2457476.974212217527
(2016-Mar-29.47421222)
3.7618e-05 JED
period 1215.257395704115
3.33
8.3141e-06
2.276e-08
d
yr
n .2962335397197213 2.0267e-09 deg/d
Q 2.910701031271957 1.3276e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1114  
   data-arc span      12975 days (35.52 yr)  
   first obs. used      1979-11-16  
   last obs. used      2015-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55499  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:54:55  

Additional Information
 Earth MOID = .561028 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 14.1 mag n/a MPO253408  
rotation period rot_per 7.9290 h n/a LCDB (Rev. 2015-May); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2010) Minor Planet Bul. 37, 57-64.]

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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