The Macclean Dome at the Norman Lockyer Observatory is a Grade II listed building in the East Devon local planning authority area, England. First listed on 6 July 1984. Observatory.
The Macclean Dome at the Norman Lockyer Observatory
- WRENN ID
- fading-cellar-vale
- Grade
- II
- Local Planning Authority
- East Devon
- Constituency
- Honiton and Sidmouth MP: Richard Foord (LD)
- Country
- England
- Date first listed
- 6 July 1984
- Type
- Observatory
- Address
- The Macclean Dome at the Norman Lockyer Observatory, Salcombe Hill, Sidmouth
- OS grid reference
- SY 139 883
- Coordinates
- 50.68824, -3.21992
- Source
- Historic England listing
Description
The McClean dome at the Norman Lockyer Observatory is an observatory dome built around 1912. It has a diameter of 6 meters and is constructed from concrete blocks with an aluminum dome. The structure features two light casement windows and an entrance extension with a boarded door. It was specifically designed to house twin equatorial 300mm refractors made by Crubb for Sir Norman Lockyer, intended for research on the spectra of bright-line stars.
Local climate
The Macclean Dome at the Norman Lockyer Observatory receives an average of 780 mm of rain a year. This makes it drier than 61% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 73% of listed buildings.
It experiences an average of 19 freeze-thaw cycles a year, fewer than 80% of listed buildings. Of these, 6 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- Sale history — 2 transactions since 2008
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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