Carlisle Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.62

Bortle class

Class 6 (Class 6)

Darkness Quotient

42%

Dataset

July 2026

Bright suburban sky

Carlisle: The Practical Verdict

Carlisle, a small city in Cumberland, presents typical suburban sky conditions for stargazing. The overall stargazing experience here is limited due to moderate light pollution, positioning it as a less than ideal location for observing faint celestial objects. The primary limiting factor is the bright sky background, which obscures the Milky Way and reduces the visibility of many deep-sky objects.

Under these skies, the Moon, planets, double stars, and bright open clusters are your best targets. For those keen on using filters, narrowband imaging of bright nebula cores is viable, despite the bright backdrop. However, attempt to photograph broadband galaxies or faint nebulae, and you will struggle against the overpowering city glow.

For those seeking darker skies, Blencogo offers a marked improvement, located about 20 km to the west-south-west. Travelling this short distance brings you from moderate to much improved viewing conditions, making serious deep-sky observing far more rewarding.

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

Blencogo sits about 20 km west south west and reaches Bortle 3, roughly 4.8x darker.

Moderate dark window

Carlisle's limiting factor is not only light pollution. Around midsummer, Carlisle 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 Carlisle?

No. Carlisle is a Bortle Class 6 sky with SQM 19.62, 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 Carlisle?

Carlisle is Bortle Class 6 (SQM 19.62), a limited suburban sky for astronomy.

Is Carlisle good for stargazing?

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

Is Carlisle good for astrophotography?

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

What can you observe from Carlisle?

Primary targets from Carlisle 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 Carlisle?

The closest meaningfully darker mapped site is Blencogo, about 20 km west south west of Carlisle, reaching Bortle 3.

When is the sky darkest in Carlisle?

The sky over Carlisle is darkest around January, December. Significant summer limitation: around 88 nights per year have no true astronomical darkness.

Is light pollution in Carlisle getting better or worse?

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

• Blencogo

  Direction

  WSW

  Distance (km)

  19.9

  SQM

  21.32

  Bortle

  3

• Setmurthy

  Direction

  SW

  Distance (km)

  31.1

  SQM

  21.30

  Bortle

  3

• Stone Cove

  Direction

  S

  Distance (km)

  46.6

  SQM

  21.36

  Bortle

  3

• Broomhills

  Direction

  NNE

  Distance (km)

  62.1

  SQM

  21.60

  Bortle

  3

• Redesmouth

  Direction

  ENE

  Distance (km)

  53.2

  SQM

  21.09

  Bortle

  4

• Phenzhopehaugh Motte

  Direction

  WNW

  Distance (km)

  56.9

  SQM

  21.15

  Bortle

  4