Kuragesma

Interval information

Ratio	43940/43923
Factorization	22 × 3-1 × 5 × 11-4 × 133
Monzo	[2 -1 1 0 -4 3⟩
Size in cents	0.6699288¢
Name	Kuragesma
Color name	3o31u4y2 ,Tritho-aquadlu-ayo 2nd
FJS name	[math]\displaystyle{ \text{m2}^{5,13,13,13}_{11,11,11,11} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	30.8459
Weil norm (log2 max(n, d))	30.8465
Wilson norm (sopfr(nd))	95
Comma size	unnoticeable
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43940/43923, the Kuragesma, is a no-sevens 13-limit unnoticeable comma measuring about 0.66993  ¢. It is the difference between 5/3, the classical major 6th, and 14641/8788 ([-2 0 0 0 4 -3⟩). Therefore 17576/14641 ([3 0 0 0 -4 3⟩), which is a stack of three 13/8's minus four 11/8's, approximates 6/5, the classical minor 3rd.

Etymology

The name was proposed by Misohito Nakai in 2025, named after his girlfriend (蒼瀬くらげ) who was interested in Xenharmonics.