Preston Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.72

Bortle class

Class 8 (Class 8)

Darkness Quotient

30%

Dataset

May 2026

City sky

Preston: The Practical Verdict

Preston is a small city in Lancashire with high light pollution. Stargazing here is limited by a generally poor city sky where only the brightest objects punch through the glow. Observations of deep-sky objects are greatly compromised due to the lack of Milky Way visibility.

While the Moon and planets offer achievable targets, the city lights significantly diminish the view of more delicate celestial objects. For those focused on double stars and solar system events, Preston still provides some worthwhile opportunities. Avoid broad deep-sky observing and attempt narrowband imaging only with caution.

Those seeking a darker sky should consider heading to Bodffordd, to the west-south-west, about 120 km away. This location presents a more promising sky for deep-sky observations with a noticeable improvement over the conditions in Preston.

At a Glance

Overall

Poor city sky - This is a poor city sky. The Milky Way is not visible and most deep-sky observing is unrealistic from the location itself.

Milky Way

Not visible - The Milky Way is erased by the bright urban sky background.

Best targets from here

Moon, planets, bright stars, double stars, solar system events, narrowband imaging only with care

Do not prioritise

visual deep-sky observing, broadband galaxies, reflection nebulae, widefield Milky Way

Best nearby upgrade

Bodffordd sits about 120 km west south west and reaches Bortle 3, roughly 11x darker.

Moderate dark window

Preston's limiting factor is not only light pollution. Around midsummer, Preston loses true astronomical darkness entirely, so deep-sky observing and imaging are strongly seasonal. Plan serious sessions around the darker months.

Frequently Asked Questions

Can you see the Milky Way from Preston?

No. Preston is a Bortle Class 8 sky with SQM 18.72, 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 Preston?

Preston is Bortle Class 8 (SQM 18.72), a poor city sky for astronomy.

Is Preston good for stargazing?

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

Is Preston good for astrophotography?

Broadband deep-sky imaging is heavily compromised from Preston and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Preston without careful processing.

What can you observe from Preston?

Primary targets from Preston include Moon, planets, bright stars, double stars, solar system events. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.

Where are darker skies near Preston?

The closest meaningfully darker mapped site is Upper Rawcliffe-with-Tarnacre, about 14 km north west of Preston, reaching Bortle 5.

When is the sky darkest in Preston?

The sky over Preston is darkest around January, December. Significant summer limitation: around 79 nights per year have no true astronomical darkness.

Is light pollution in Preston getting better or worse?

Long-term light pollution over Preston has been broadly stable across the available measurements.

• Upper Rawcliffe-with-Tarnacre

  Direction

  NW

  Distance (km)

  14.1

  SQM

  20.40

  Bortle

  5

• Scarisbrick

  Direction

  SW

  Distance (km)

  18

  SQM

  20.10

  Bortle

  6

• Bodffordd

  Direction

  WSW

  Distance (km)

  119.7

  SQM

  21.36

  Bortle

  3

• Raise

  Direction

  NE

  Distance (km)

  118.9

  SQM

  21.11

  Bortle

  4

• Kirby Hill

  Direction

  ENE

  Distance (km)

  94.6

  SQM

  20.50

  Bortle

  5

• Mainsriddle

  Direction

  NNW

  Distance (km)

  133.8

  SQM

  21.16

  Bortle

  4