Sutton Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

20.61

Bortle class

Class 5 (Class 5)

Darkness Quotient

60%

Dataset

July 2026

Suburban sky

Sutton: The Practical Verdict

Sutton is a small village in Quebec, not far from the bright lights of Montreal. The overall stargazing experience here is compromised but usable, with moderate light pollution affecting the sky quality. The brightest parts of the sky are towards the north-west, while the south-east offers the cleanest views.

The Milky Way appears weak and often conditional in Sutton, rendering some objects like faint galaxies and reflection nebulae difficult to observe. However, the Moon, planets, double stars, and bright open clusters are all visible. Narrowband nebulae and brighter emission nebulae also show reasonably well here, making specific object classes rewarding.

While Sutton itself is a decent spot for certain targets, nearby darker sites offer slight improvements. Heading about 110 km south-south-east to Lyman, New Hampshire, is an option for better darkness, though the gain will be subtle rather than dramatic.

At a Glance

Overall

Compromised but usable - This is a compromised but usable sky. Bright deep-sky objects and some imaging are possible, but contrast is noticeably reduced.

Milky Way

Weak or conditional - The Milky Way is usually weak from this sky and may only appear as a faint suggestion under good conditions.

Best targets from here

Moon, planets, double stars, bright open clusters, globular clusters, narrowband nebulae

Do not prioritise

faint galaxies, reflection nebulae, low surface-brightness nebulae, serious Milky Way photography

Limited nearby upgrade

Lyman, New Hampshire is the strongest nearby option but remains Bortle 3; the improvement is real but modest.

Good dark window

Sutton'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 Sutton?

Conditionally. From Sutton the Milky Way may show as a faint suggestion under transparent, moonless conditions, but it lacks dark-site contrast.

What Bortle class is Sutton?

Sutton is Bortle Class 5 (SQM 20.61), a compromised but usable for astronomy.

Is Sutton good for stargazing?

Partly. Sutton offers a compromised but usable where many bright targets remain accessible, but the faintest deep-sky work is compromised.

Is Sutton good for astrophotography?

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

What can you observe from Sutton?

Primary targets from Sutton include Moon, planets, double stars, bright open clusters, globular clusters. Targets such as faint galaxies, reflection nebulae, low surface-brightness nebulae are not realistic from this sky.

Where are darker skies near Sutton?

The closest meaningfully darker mapped site is Lyman, New Hampshire, about 110 km south south east of Sutton, reaching Bortle 3.

When is the sky darkest in Sutton?

The sky over Sutton is darkest around January, December.

Is light pollution in Sutton getting better or worse?

There is not yet enough long-term data to give a confident trend for Sutton.

• Garrick Corners, Quebec

  Direction

  W

  Distance (km)

  18.4

  SQM

  21.05

  Bortle

  4

• Gilman Corner, Quebec

  Direction

  W

  Distance (km)

  10

  SQM

  20.93

  Bortle

  4

• Lyman, New Hampshire

  Direction

  SSE

  Distance (km)

  110.3

  SQM

  21.49

  Bortle

  3