ObjID526-1
‹ Ancient Sundials
Dialface ID 614
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Abstract
Spherical sundial, situated in a stone block with triangle shaped base.
Measurements
Measurement record: pipeline ObjID 526, matched to this dialface by inventory number.
| Quality grade | B (completeness 62 %) |
|---|---|
| Dial surface | sphere (decisive) · fit residual mm: cone 2.15, cylinder 2.75, sphere 0.50 |
| Latitude φ | 37.69 ± 1.86° (consensus of witnesses) |
| Klima | Athens, Delos, Rhodes (IV) |
| Engraved lines | 8 hour lines, 2 day lines |
| Cone half-angle α | not shown: surface fit decisively sphere: cone-specific quantities do not apply |
| Measured | 2026-06-12 20:57 |
What the dial shows at this latitude
| Winter solstice | Equinox | Summer solstice | |
|---|---|---|---|
| Noon altitude of the Sun | 28.6° | 52.3° | 76.0° |
| Noon shadow (gnomon heights) | 1.83 | 0.77 | 0.25 |
| Length of the day | 9.4 h | 12.0 h | 14.6 h |
| Length of a seasonal hour | 47 min | 60 min | 73 min |
Computed for the measured latitude with the obliquity of the JPL ephemeris at 101 BC (year -100). The latitude is the one the dial was made for, not a find-spot coordinate.
References
3D Models
