Bath Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.69

Bortle class

Class 6 (Class 6)

Darkness Quotient

43%

Dataset

May 2026

Bright suburban sky

Bath: The Practical Verdict

Bath, a historic small city in the region of Bath and North East Somerset, offers a night sky hampered by moderate light pollution. The suburban environment yields a limited sky for astronomy, with the backdrop generally too bright to glimpse the Milky Way.

Despite these suburban conditions, planetary viewing and observing bright objects like the Moon, double stars, and open clusters remain feasible. Plan your sessions to focus on these targets. Anything faint is a challenge, with broadband galaxies and dim nebulae best avoided.

For a significant improvement, head south-south-west to Moor, about 55 km away. It offers much darker skies, better suited for deeper exploration of the night.

At a Glance

Overall

Limited suburban sky - This is a limited sky for astronomy. The brightest targets remain accessible, but faint deep-sky observing is heavily compromised.

Milky Way

Not visible - The sky background is generally too bright for a reliable Milky Way view.

Best targets from here

Moon, planets, double stars, bright open clusters, narrowband imaging, bright nebula cores

Do not prioritise

broadband galaxies, reflection nebulae, visual faint nebulae, Milky Way photography

Best nearby upgrade

Moor sits about 57 km south south west and reaches Bortle 4, roughly 3.7x darker.

Moderate dark window

Bath's longest dark windows fall in December and January, with the shortest nights around June and July. Plan deep-sky sessions around the autumn and winter months for the best combination of long nights and true astronomical darkness.

Frequently Asked Questions

Can you see the Milky Way from Bath?

No. Bath is a Bortle Class 6 sky with SQM 19.69, so the Milky Way is not visible from the city. For Milky Way photography, look for a Bortle 4 or darker site.

What Bortle class is Bath?

Bath is Bortle Class 6 (SQM 19.69), a limited suburban sky for astronomy.

Is Bath good for stargazing?

Not for serious deep-sky observing. Bath is a limited suburban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.

Is Bath good for astrophotography?

Broadband deep-sky imaging is heavily compromised from Bath and a Bortle 4 or darker site is strongly recommended. Narrowband imaging of bright emission nebulae remains viable from Bath with appropriate Ha or OIII filters.

What can you observe from Bath?

Primary targets from Bath include Moon, planets, double stars, bright open clusters, narrowband imaging. Targets such as broadband galaxies, reflection nebulae, visual faint nebulae are not realistic from this sky.

Where are darker skies near Bath?

The closest meaningfully darker mapped site is Henstridge, about 42 km south of Bath, reaching Bortle 4.

When is the sky darkest in Bath?

The sky over Bath is darkest around January, December. Significant summer limitation: around 58 nights per year have no true astronomical darkness.

Is light pollution in Bath getting better or worse?

The long-term trend for Bath is gradually improving, with the sky darkening by about 0.04 SQM per year.

• Henstridge

  Direction

  S

  Distance (km)

  42.3

  SQM

  21.03

  Bortle

  4

• Compton Chamberlayne

  Direction

  SE

  Distance (km)

  44

  SQM

  20.89

  Bortle

  4

• Moor

  Direction

  SSW

  Distance (km)

  57.2

  SQM

  21.12

  Bortle

  4

• Thelbridge

  Direction

  WSW

  Distance (km)

  107.4

  SQM

  21.06

  Bortle

  4