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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0517364704002824 3.4344e-08  
a 3.012432645625197 1.6098e-08 au
q 2.856580013221965 1.0537e-07 au
i 9.404840643524706 3.6219e-06 deg
node 243.6701429604354 2.5645e-05 deg
peri 230.9281599107658 4.6803e-05 deg
M 252.3500014899034 3.9131e-05 deg
tp 2459171.565563874999
(2020-Nov-18.06556387)
0.00020833 TDB
period 1909.740881006309
5.23
1.5308e-05
4.191e-08
d
yr
n .1885072491144995 1.511e-09 deg/d
Q 3.168285278028429 1.6931e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2318  
   data-arc span      25720 days (70.42 yr)  
   first obs. used      1949-05-31  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45291  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:36:21  

Additional Information
 Earth MOID = 1.88425 au 
 Jupiter MOID = 2.00291 au 
 T_jup = 3.227 
[ 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 11.7   n/a MPO416759  
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. 2019-January); 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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