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8325 Trigo-Rodriguez (1981 EM26)
Classification: Main-belt Asteroid          SPK-ID: 2008325
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02348458060618215 5.4129e-08  
a 3.175164867789364 3.413e-08 AU
q 3.100597452513847 1.726e-07 AU
i 6.978818088569573 6.839e-06 deg
node 5.951961687066817 4.3214e-05 deg
peri 286.5660565315856 0.00015708 deg
M 238.8514529605259 0.0001539 deg
tp 2457695.946229590563
(2016-Nov-03.44622959)
0.00088542 JED
period 2066.559185154958
5.66
3.332e-05
9.123e-08
d
yr
n .1742026081740339 2.8088e-09 deg/d
Q 3.249732283064881 3.4931e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      848  
   data-arc span      12436 days (34.05 yr)  
   first obs. used      1981-02-09  
   last obs. used      2015-02-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56291  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:13:10  

Additional Information
 Earth MOID = 2.09583 AU 
 T_jup = 3.189 
[ 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 13.6 mag n/a MPO256926  
rotation period rot_per 32.25 h n/a LCDB (Rev. 2015-Feb); 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:
[Masiero, J.; Jedicke, R.; Durecy, J.; Gwyn, S.; et al. (2009) Icarus 204, 145-171.]

8325 Trigo-Rodriguez           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Josep Maria Trigo-Rodriguez (b. 1970) is a Consejo Superior de Investigaciones Cient{í}ficas research scientist at the Institute of Space Studies of Catalonia. His investigations include compositions and orbits of meteoroids and their relationships to minor planets and comets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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