noon mark
The Noon mark is a type of sundial that at its simplest is a vertical line on a south facing wall or a north-south line on a horizontal pavement. When the shadow of a point (or a projected image of the Sun) crosses the line it will be midday. Noon in local standard time is defined as when the sun is overhead, however clocks and watches use mean time which varies from standard time by a few minutes each day.
noon mark
Bene16 · CC BY-SA 3.0
- Field
- sundial
Reference Check
Propose documentary evidence for noon mark. A contribution is never written directly as fact: identity, source, rights and evidence gates still decide.
Sign in to contribute
World of VALÉORINE
Documentary connections
Only confirmed graph relationships appear here. Images are shown only when their identity and reuse rights both pass the documentary gate.
Documentary evidence
Documentary basis
Authority files
wikidata · Q955484 · wikipedia · Noon mark
In this article
Overview
The difference is calculated using the equation of time and this can be shown on the noon mark by drawing an analemma, or using a correction table. • Illustration — A noon mark on the facade of the Palace of the Dukes of Burgundy in Dijon
Dessin de la table d'une méridienne obtenu à partir du logiciel Shadows.
Aubry Gérard
Détermination de l'instant de l'équinoxe.
Aubry Gérard
Text attribution
Licensing
Text attribution
Part of the biographical narrative on this page reuses licensed material. Its origin, revision and licence are recorded here.
The biographical narrative on this page is based on the Wikipedia article Noon mark, revision 1359694828 (EN edition), by its contributors. VALÉORINE has edited that text and built its own documentary record around it. The reused material is available under CC BY-SA 4.0, and this page's reuse of it is offered under the same licence. Everything else on this page — the chronology, the holdings, the evidence, the plates and the connections — is VALÉORINE's own record. Sources and licences.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Waugh, 1973, pp=18–28
Bibliography printed in the source article · 4
- Mayall, R. N. Sundials: Their Construction and Use. Sky Publishing. 1994. 0-933346-71-9.
- Michnik, Hugo. Theorie einer Bifilar-Sonnenuhr. Astronomische Nachrichten. 217. 5190. 81–90. 1923. 10.1002/asna.19222170602.
- Rohr, R. R. J. Sundials: History, Theory, and Practice. Dover. 1996. 0-486-29139-1.
- Waugh, A. E. Sundials: Their Theory and Construction. Dover. 1973. 0-486-22947-5.
References
Citations
References
Each reference names the institution holding it, so a reader may go to the document itself.
reference work
Secondary witness
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
Elsewhere in Scientific instruments
736 published records in this field, each with its sources named.
- Newton telescopeTerminology
- Next-Generation Transit SurveyTerminology
- Nicholas U. Mayall TelescopeTerminology
- nocturnalTerminology
- Nordic Optical TelescopeTerminology
- Northeastern Space Radio ObservatoryTerminology
- Northern Extended Millimeter ArrayTerminology
- Noyes Armillary SphereTerminology
Best supported in this field
For owners
Own an object connected with noon mark?
A specialist will read what you send and tell you what the house can establish, what it cannot, and whether the object is suited to sale. There is no charge and no obligation. The object stays with you throughout; nothing is shipped to us unless it is arranged in writing beforehand.