245/242
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| Ratio | 245/242 |
| Factorization | 2-1 × 5 × 72 × 11-2 |
| Monzo | [-1 0 1 2 -2⟩ |
| Size in cents | 21.329642¢ |
| Name | frostma |
| Color name | luuzzy2, luluzozoyo 2nd |
| FJS name | [math]\text{M2}^{5,7,7}_{11,11}[/math] |
| Special properties | reduced |
| Tenney height (log2 nd) | 15.8555 |
| Weil height (log2 max(n, d)) | 15.8733 |
| Wilson height (sopfr (nd)) | 43 |
| Harmonic entropy (Shannon, [math]\sqrt{n\cdot d}[/math]) |
~3.80589 bits |
| Comma size | small |
| open this interval in xen-calc | |
The frostma (ratio: 245/242, monzo: [-1 0 1 2 -2⟩) is a small 11-limit comma named after Frostburn used in the construction of the frostburn temperament.
It can be factored into (243/242)(245/243).
When tempered out, it equates a stack of two 11/7s with a 5/2 major tenth.
History
Before the comma got the name frostma, it was known as the cassacot, probably derived from cassandra and tetracot. However, cassandra was a misnomer for andromeda. The temperament's name was later corrected. Since then, cassacot has lost its root, thus justifying the new name.
Quotes
"245/242 should be the frostma because 243/242 is the rastma…" —Praveen Venkataramana