[**moon-sighting v1.1.1**](../README.md)

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[moon-sighting](../README.md) / YALLOP\_THRESHOLDS

# Variable: YALLOP\_THRESHOLDS

> `const` **YALLOP\_THRESHOLDS**: `object`

Defined in: [types.ts:155](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L155)

Published q thresholds (Yallop 1997, NAO TN 69):
  A: q > +0.216   — Easily visible to the naked eye
  B: q > -0.014   — Visible under perfect conditions
  C: q > -0.160   — May need optical aid to find; visible to naked eye
  D: q > -0.232   — Optical aid needed; will not be visible to naked eye
  E: q > -0.293   — Not visible even with telescope
  F: q <= -0.293  — Below Danjon limit (Moon too close to Sun)

## Type Declaration

### A

> `readonly` **A**: `0.216` = `0.216`

### B

> `readonly` **B**: `-0.014` = `-0.014`

### C

> `readonly` **C**: `-0.16` = `-0.16`

### D

> `readonly` **D**: `-0.232` = `-0.232`

### E

> `readonly` **E**: `-0.293` = `-0.293`