ObjI134-11
‹ Ancient Sundials
Dialface ID 132
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Abstract
Two low legs with a cyma recta profile flank the base. Gibbs: Lead remains in the gnomon hole at the top of the dial. […] Upper corners are broken away.
Measurements
Measurement record: pipeline ObjID 134, matched to this dialface by inventory number.
| Quality grade | A (completeness 81 %) |
|---|---|
| Dial surface | cone (decisive) · fit residual mm: cone 0.34, cylinder 1.62, sphere 3.33 |
| Latitude φ | 36.49 ± 0.02° (consensus of witnesses) |
| Klima | nearest Rhodes (27.3 sigma) |
| Engraved lines | 9 hour lines, 2 day lines |
| Cone half-angle α | 30.5 ± 0.35° (cone residual on all points 0.35 mm) |
| Measured | 2026-06-12 20:20 |
What the dial shows at this latitude
| Winter solstice | Equinox | Summer solstice | |
|---|---|---|---|
| Noon altitude of the Sun | 29.8° | 53.5° | 77.2° |
| Noon shadow (gnomon heights) | 1.75 | 0.74 | 0.23 |
| Length of the day | 9.5 h | 12.0 h | 14.5 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
- – Deonna, Waldemar, Le mobilier délien, Paris, 1938, p. 190, plate 539 (photograph).
- – Gibbs, Sharon L., Greek and Roman Sundials, New Haven and London, 1976, p. 252.
3D Models
