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4455 Ruriko (1988 XA)
Classification: Main-belt Asteroid          SPK-ID: 2004455
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05185762661177367 8.7798e-09  
a 3.014007360363052 1.3097e-08 au
q 2.857708092064208 2.4886e-08 au
i 9.402777404692804 7.6598e-07 deg
node 243.6676557453747 2.139e-06 deg
peri 230.3158688286069 2.7401e-05 deg
M 5.99787242502324 2.5061e-05 deg
tp 2459168.657319961600
(2020-Nov-15.15731996)
0.00013305 TDB
period 1911.238519512097
5.23
1.2457e-05
3.411e-08
d
yr
n .1883595356229536 1.2277e-09 deg/d
Q 3.170306628661897 1.3776e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3111  
   data-arc span      26226 days (71.80 yr)  
   first obs. used      1949-05-31  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41009  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:38:15  

Additional Information
 Earth MOID = 1.88484 au 
 Jupiter MOID = 2.00043 au 
 T_jup = 3.226 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.86   n/a MPCxxxxx  
diameter diameter 13.794 km 0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.23 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[De Sanctis, M.C.; Barucci, M.A.; Angeli, C.A.; Fulchignoni, M.; et al. (1994) Planet. Space Sci. 42, 859-864.]
geometric albedo albedo 0.337   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4455 Ruriko (1988 XA)          Discovered 1988-Dec-02 by Ueda and Kaneda at Kushiro
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1988 XA = 1972 TL4 = 1972 VQ = 1982 UO5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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