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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02348457401995449 5.1707e-08  
a 3.175164864164571 3.2946e-08 AU
q 3.100597469886539 1.6738e-07 AU
i 6.978817737589363 6.8348e-06 deg
node 5.95197623370381 4.2047e-05 deg
peri 286.5660346121793 0.00015588 deg
M 238.8514616138025 0.00015255 deg
tp 2457695.946178726039
(2016-Nov-03.44617873)
0.00087733 JED
period 2066.559181616157
5.66
3.2164e-05
8.806e-08
d
yr
n .1742026084723406 2.7113e-09 deg/d
Q 3.249732258442602 3.3719e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      880  
   data-arc span      12464 days (34.12 yr)  
   first obs. used      1981-02-09  
   last obs. used      2015-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55891  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:31:18  

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-May); 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

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Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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