Gilbert Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.10

Bortle class

Class 8 (Class 8)

Darkness Quotient

24%

Dataset

May 2026

City sky

Gilbert: The Practical Verdict

Gilbert, a mid-sized city in Arizona, offers an inviting suburban setting. However, the stargazing experience here is significantly hampered by high light pollution. The sky is often washed out, severely limiting the range of observable celestial objects.

The Milky Way is completely erased by the urban glow. In this environment, observable targets are largely restricted to the Moon, planets, bright stars, and double stars. Attempting to view faint nebulae or widefield Milky Way details is impractical, as the brightness of the city sky renders them nearly invisible.

For those seeking a more rewarding astronomical experience, Coconino County, about 280 km to the north-east, offers significantly darker skies classified as Bortle 3. It is advisable to make the trip to escape the oppressive light pollution of Gilbert for deep-sky observations.

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

Coconino County, Arizona sits about 280 km north east and reaches Bortle 3, roughly 22x darker.

Good dark window

Gilbert'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 Gilbert?

No. Gilbert is a Bortle Class 8 sky with SQM 18.10, 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 Gilbert?

Gilbert is Bortle Class 8 (SQM 18.10), a poor city sky for astronomy.

Is Gilbert good for stargazing?

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

Is Gilbert good for astrophotography?

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

What can you observe from Gilbert?

Primary targets from Gilbert 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 Gilbert?

The closest meaningfully darker mapped site is Pima County, Arizona, about 164 km south west of Gilbert, reaching Bortle 5.

When is the sky darkest in Gilbert?

The sky over Gilbert is darkest around January, December.

Is light pollution in Gilbert getting better or worse?

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

• Sweetwater, Arizona

  Direction

  SSW

  Distance (km)

  176.8

  SQM

  21.13

  Bortle

  4

• Pima County, Arizona

  Direction

  SW

  Distance (km)

  163.9

  SQM

  20.59

  Bortle

  5

• Coconino County, Arizona

  Direction

  NE

  Distance (km)

  280.4

  SQM

  21.48

  Bortle

  3