File:Ancient Roman time keeping hora hora noctis vigilia length.png
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Summary
editDescriptionAncient Roman time keeping hora hora noctis vigilia length.png |
English: Lengths of 1/12 of the day, 1/12 of the nigth and 1/4 of the nigth corresponding respectively to ancient Roman hora (hours: hora prima, secunda, tertia etc), hora noctis (night hours: hora prima noctis, hora secunda noctis, hora tertia noctis etc) and vigilia (derived from watches: vigilia prima, secunda, tertia and quarta). The surise and sunset times for this diagram are calculated for Forum Romanum 41°53′33″N 12°29′07″E / 41.892426°N 12.485167°E / 41.892426; 12.485167 AD 8 (the Julian calendar). Sunrise and sunset times are used as boundaries of day and night. Many sources however are ambiguous because of confusing terms sunrise with dusk and sunset with dawn. This is important, because times of dusk and dawn differ significantly from times of sunrise and sunset. The semidiameter of the sun and atmospheric refraction are taken into account. Equinoxes and solstices are computed too, not set by Romans. |
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Source | Own work |
Author | Darekk2 |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:38, 11 March 2016 | 800 × 1,312 (157 KB) | Darekk2 (talk | contribs) | equinoxes and solstices | |
03:54, 11 March 2016 | 800 × 1,312 (155 KB) | Darekk2 (talk | contribs) | labels of seasons positions | ||
03:28, 11 March 2016 | 800 × 1,312 (155 KB) | Darekk2 (talk | contribs) | corrected the grid ... | ||
19:02, 10 March 2016 | 800 × 1,312 (155 KB) | Darekk2 (talk | contribs) | replace O h by 0 h | ||
18:55, 10 March 2016 | 800 × 1,312 (155 KB) | Darekk2 (talk | contribs) | replaced word length by duration | ||
18:40, 10 March 2016 | 800 × 1,312 (155 KB) | Darekk2 (talk | contribs) | User created page with UploadWizard |
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