294/289

294/289, the nordic comma or the septendecimal neutral third comma, is a small 17-limit (also 2.3.7.17-subgroup) comma with a value of roughly 29.7 cents. It is significant in just intonation as the amount by which a stack of two 17/14 supraminor thirds fall short of 3/2 just perfect fifth. It is also difference between 17/14 and 21/17 submajor third.

Interval information

Ratio	294/289
Factorization	2 × 3 × 72 × 17-2
Monzo	[1 1 0 2 0 0 -2⟩
Size in cents	29.69599¢
Names	nordic comma, septendecimal neutral third comma
Color name	bisuzo unison
FJS name	[math]\displaystyle{ \text{A1}^{7,7}_{17,17} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	16.3746
Weil norm (log2 max(n, d))	16.3993
Wilson norm (sopfr(nd))	53
Comma size	small
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Temperaments

Tempering out this comma in the full 17-limit leads to the nordic rank-6 temperament.