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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02348458666459968 5.6579e-08  
a 3.175164871128503 3.5343e-08 AU
q 3.100597436538094 1.7796e-07 AU
i 6.978818119288634 6.8397e-06 deg
node 5.951956727018263 4.4091e-05 deg
peri 286.5660684191169 0.00015832 deg
M 238.8514449451717 0.00015529 deg
tp 2457695.946276699281
(2016-Nov-03.44627670)
0.00089381 JED
period 2066.559188414881
5.66
3.4504e-05
9.447e-08
d
yr
n .1742026078992356 2.9086e-09 deg/d
Q 3.249732305718913 3.6173e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      837  
   data-arc span      12401 days (33.95 yr)  
   first obs. used      1981-02-09  
   last obs. used      2015-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56137  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:22:45  

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

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