Peoria Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.03

Bortle class

Class 8 (Class 8)

Darkness Quotient

23%

Dataset

April 2026

City sky

Peoria: The Practical Verdict

Peoria, a small city in Arizona, lies under high light pollution conditions. Observing quality here is poor with significant urban sky brightness from nearby Phoenix to the south-east. This results in an illuminated sky unsuitable for deep-sky observations.

Under these conditions, the Moon, planets, and bright stars are the most feasible objects to target, alongside occasional narrowband imaging on the brightest nebulae. The Milky Way is entirely invisible, and visual deep-sky astronomy is unviable from this location.

To access darker skies, Mohave County located to the north-west offers a substantial improvement in observing quality. At approximately 215 km away, it features significantly reduced light pollution, making it a strong choice for visual and imaging-based deep-sky astronomy.

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

Mohave County, Arizona sits about 214 km north west and reaches Bortle 4, roughly 18x darker.

Good dark window

Peoria'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 Peoria?

No. Peoria is a Bortle Class 8 sky with SQM 18.03, 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 Peoria?

Peoria is Bortle Class 8 (SQM 18.03), a poor city sky for astronomy.

Is Peoria good for stargazing?

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

Is Peoria good for astrophotography?

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

What can you observe from Peoria?

Primary targets from Peoria 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 Peoria?

The closest meaningfully darker mapped site is Yavapai County, Arizona, about 70 km north east of Peoria, reaching Bortle 6.

When is the sky darkest in Peoria?

The sky over Peoria is darkest around January, December.

Is light pollution in Peoria getting better or worse?

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

• Yavapai County, Arizona

  Direction

  NE

  Distance (km)

  69.8

  SQM

  20.03

  Bortle

  6

• Yuma County, Arizona

  Direction

  SW

  Distance (km)

  169.2

  SQM

  20.88

  Bortle

  4

• Mohave County, Arizona

  Direction

  NW

  Distance (km)

  214.3

  SQM

  21.15

  Bortle

  4