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8191 Mersenne (1993 OX9)
Classification: Main-belt Asteroid          SPK-ID: 2008191
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1097764443669538 3.099e-08  
a 2.263972066540905 7.0283e-09 au
q 2.01544126292994 7.1922e-08 au
i 2.826855689046085 3.8941e-06 deg
node 302.54670033 7.5326e-05 deg
peri 109.8830113055693 7.7942e-05 deg
M 214.8859401554946 2.07e-05 deg
tp 2459502.047436244723
(2021-Oct-14.54743624)
7.2526e-05 TDB
period 1244.242475481516
3.41
5.794e-06
1.586e-08
d
yr
n .289332671962257 1.3473e-09 deg/d
Q 2.51250287015187 7.7999e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1677  
   data-arc span      14527 days (39.77 yr)  
   first obs. used      1980-11-01  
   last obs. used      2020-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51111  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:22:39  

Additional Information
 Earth MOID = 1.02848 au 
 Jupiter MOID = 2.78089 au 
 T_jup = 3.608 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO425888  
diameter diameter 2.890 km 0.580 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.306   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8191 Mersenne          
Named for Marin Mersenne (1588-1648), French mathematician and philosopher, best known for his discovery of prime numbers of the form 2n-1 and that n is then necessarily also prime. The number 8191 = 213-1 is the fifth Mersenne prime. Mersenne correctly verified that the numbers are prime also for n = 17 , 19 and 31---and that they are not prime for n = 11 , 23 and 29. The largest prime Mersenne correctly established was for n = 127 . Name proposed by the discoverer, following a suggestion by B. G. Marsden, who wrote the citation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980411/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1993 OX9 = 1980 VA4 = 1990 SG20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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