15625/15309

Interval information

Ratio	15625/15309
Factorization	3-7 × 56 × 7-1
Monzo	[0 -7 6 -1⟩
Size in cents	35.37137¢
Name	Arcturus comma
Color name	ry6-2, rutribiyo negative 2nd
FJS name	[math]\displaystyle{ \text{dd}{-2}^{5,5,5,5,5,5}_{7} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	27.8337
Weil norm (log2 max(n, d))	27.8631
Wilson norm (sopfr(nd))	58
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15625/15309, the Arcturus comma, is a no-2s 7-limit (3.5.7-subgroup) comma of about 35.4 ¢ in size. It is named as such because it is tempered out by the arcturus temperament. It factors in the no-2s 7-limit as (245/243)⋅(3125/3087), and tempering both of these out leads to 13edt, or the equal-tempered Bohlen-Pierce scale.

It is a ragisma sharp of 50/49, and a landscape comma sharp of 49/48. It is extremely close to half of 25/24, with two instances of this interval exceeding 25/24 by the euzenius comma of 0.07 ¢.