The main dip of the eastern horizon is a half-month north of the equinox. The tomb's passage is centred about a week south of the equinox but is wide enough that the sun probably shone into it for the full half-month leading up to and including spring equinox.
Vertical scale x2, maxpic 3200x1600.
Orange lines mark the annual solar round. Lunistice positions over the 18.6 year lunar nodal cycle are blue. More about the Solar Calendar More about the Lunar Calendar More about this placeLook West
West Kennet Long Barrow: Luni-solar rises
The main dip of the eastern horizon is a half-month north of the equinox. The tomb's passage is centred about a week south of the equinox but is wide enough that the sun probably shone into it for the full half-month leading up to and including spring equinox.
- Silbury Hill is visible c.950m north-west (327°)
- Avebury henge & stone circles are c.2.3km north-north-west (355°)
- East Kennet Long Barrow is visible c.1.4km south-east (129°) but is NOT open to the public.
- Stoney Littleton Long Barrow is the only other Long Barrow that has been surveyed so far.
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