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Herschel Astronomical Society Observatory

Herschel Astronomical Society Observatory

Eton, Windsor, Berkshire, SL4 6EF

Best time to visit

Located on the outskirts of Eton College the Herschel Astronomical Society Observatory has a range of instruments including a historic 6inch Cooke Refractor and large 23″ aperture Newtonian reflecting telescope. Please note that visiting the facility is strictly by prior arrangement. Contact the Society or attend one of their regular meetings at the nearby Marten Building for more information.

Herschel Astronomical Society Observatory is a private location and is only accessible out of normal hours for stargazing by prior arrangement or when public events are scheduled.

Location events organiser

Herschel Astronomical Society

Herschel Astronomical Society organises events at this location

Please contact Herschel Astronomical Society directly with any enquiries relating to visiting this location

Email: [email protected]
Website: Herschel Astronomical Society

Weather forecast

  • 01/06/26

    21° 53%

  • 01/06/26

    19° 89%

  • 01/06/26

    17° 93%

  • 02/06/26

    16° 95%

Weather forecast for Staines (6.2 miles away) updated 01/06/26 at 06:01. Powered by Met Office data.

Local light pollution

Herschel Astronomical Society Observatory is estimated to have light pollution levels similar to a suburban location based on the latest data from the VIIRS satellite. For more advanced light pollution data, view this location on DarkSkySites.

The above demonstrates the estimated effect of light pollution - graphics created using Stellarium.

Light pollution map of Herschel Astronomical Society Observatory

Best time to visit

The Moon has a big impact on the visibility of celestial bodies in the night sky. Try to plan your stargazing when there is no bright Moon at night as this is when the skies will be at their darkest.

The below chart shows when the skies will be at their darkest at this location and therefore the best time to visit. Moonlight is shown in light yellow and the Sun's twilight in light blue. Midnight on the date shown is shown as a white line with sunset to the left and sunrise the next morning to the right. A black background with stars shows the best times for stargazing. See our dark sky calendar for more details.

Moon phase on Mon 1st Jun

Mon 1st Jun

Full Moon
100 % illuminated
NO DARKNESS
Moon phase on Tue 2nd Jun

Tue 2nd Jun

Full Moon
98 % illuminated
Dark from 22:04 to 22:45
Dark for 0h 40m
Moon phase on Wed 3rd Jun

Wed 3rd Jun

Waning Gibbous
94 % illuminated
Dark from 22:06 to 23:16
Dark for 1h 9m
Moon phase on Thu 4th Jun

Thu 4th Jun

Waning Gibbous
88 % illuminated
Dark from 22:07 to 23:39
Dark for 1h 31m
Moon phase on Fri 5th Jun

Fri 5th Jun

Waning Gibbous
82 % illuminated
Dark from 22:09 to 23:57
Dark for 1h 47m
Moon phase on Sat 6th Jun

Sat 6th Jun

Waning Gibbous
73 % illuminated
Dark from 22:11 to 00:10
Dark for 1h 58m
Moon phase on Sun 7th Jun

Sun 7th Jun

Third Quarter
64 % illuminated
Dark from 22:12 to 00:22
Dark for 2h 9m

Find more dates

If you are planning to visit this location check our dark sky calendar to find out when is best!

Calendar

Events nearby

Display nearby events on a calendar

  • Aylesbury Astronomical Society meeting

    Monday 1st June 2026 from 19:30pm to 21:00pm

    Aylesbury Scout Hut, Aylesbury, HP20 1LL (23.5 miles away)

    More info

  • East Oxford Astronomy Club meeting and observing

    Tuesday 2nd June 2026 from 19:00pm to 20:00pm

    Leys College and African School, Oxford, OX4 6HN (29.6 miles away)

    More info

  • Guildford Astronomical Society lecture meeting

    Thursday 4th June 2026 from 19:30pm to 21:00pm

    University of Surrey, Guildford, GU2 7XH (17.5 miles away)

    More info

  • Maidenhead Astronomical Society meeting & observing

    Friday 5th June 2026 from 19:30pm to 21:30pm

    St James-the-Less Church Hall, Maidenhead, SL6 6QW (7.3 miles away)

    More info

  • Farnham Astronomical Society meeting

    Tuesday 9th June 2026 from 19:30pm to 21:30pm

    Aldershot Cricket Club, Aldershot, GU12 4BP (18.9 miles away)

    More info

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