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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02348455809660209 4.9149e-08  
a 3.175164855443104 3.1737e-08 AU
q 3.100597511929161 1.6193e-07 AU
i 6.978817647475032 6.8111e-06 deg
node 5.951981543872038 4.0432e-05 deg
peri 286.5660118882007 0.00015458 deg
M 238.8514817947836 0.00015117 deg
tp 2457695.946060012932
(2016-Nov-03.44606001)
0.00086902 JED
period 2066.559173101594
5.66
3.0984e-05
8.483e-08
d
yr
n .1742026091900839 2.6118e-09 deg/d
Q 3.249732198957047 3.2482e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      12541 days (34.34 yr)  
   first obs. used      1981-02-09  
   last obs. used      2015-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55584  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:59:06  

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 13.7 mag n/a MPO337326  
rotation period rot_per 32.25 h n/a LCDB (Rev. 2015-July); 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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