1445/1444

Interval information
Ratio	1445/1444
Factorization	2-2 × 5 × 172 × 19-2
Monzo	[-2 0 1 0 0 0 2 -2⟩
Size in cents	1.198501¢
Name	aureusma
FJS name	[math]\displaystyle{ \text{P1}^{5,17,17}_{19,19} }[/math]
Special properties	superparticular,; reduced
Tenney norm (log2 nd)	20.9927
Weil norm (log2 max(n, d))	20.9937
Wilson norm (sopfr(nd))	81
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1445/1444, the aureusma, is a 19-limit unnoticeable comma measuring about 1.20 cents. It is the difference between 5/4 and a stack of two 19/17's. It is also the difference between 153/152 and 171/170.

The term comes from Latin aureus, meaning golden, for its possible association with golden meantone.

Temperaments

Tempering out this comma results in 5/4 being split into two 19/17's, and enables the essentially tempered aureusmic chord.