Phoenix Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.27

Bortle class

Class 9 (Class 9)

Darkness Quotient

18%

Dataset

August 2026

Inner city sky

Phoenix: The Practical Verdict

Phoenix, located in Arizona, is a major global metropolis with a very dense urban setting. It suffers from extreme light pollution, making the city sky harsh for serious stargazing activities. The severe urban sky conditions mean that the Milky Way is not visible, with Bortle Class 9 and a darkness quotient of 18.

Observing from Phoenix is limited predominantly to the brightest celestial objects. The Moon, planets, and bright stars are the most accessible, with narrowband imaging possible only with meticulous care. The light-drenched skyline renders visual deep-sky observing impractical. Even bright open clusters and the brightest nebulae are challenging under these conditions.

To experience better stargazing, it's worth travelling to a vastly darker site such as Catron County in New Mexico, about 285 km east of Phoenix. This offers Bortle Class 3 skies, providing a significant improvement for deep-sky observing enthusiasts.

At a Glance

Overall

Severe urban sky - This is a severely light-polluted urban sky. Only the Moon, planets, bright stars, and a few specialist targets remain practical.

Milky Way

Not visible - The Milky Way is not visible from this sky.

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

Catron County, New Mexico sits about 285 km east and reaches Bortle 3, roughly 44x darker.

Good dark window

Phoenix'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 Phoenix?

No. Phoenix is a Bortle Class 9 sky with SQM 17.27, 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 Phoenix?

Phoenix is Bortle Class 9 (SQM 17.27), a severe urban sky for astronomy.

Is Phoenix good for stargazing?

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

Is Phoenix good for astrophotography?

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

What can you observe from Phoenix?

Primary targets from Phoenix 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 Phoenix?

The closest meaningfully darker mapped site is Camp Verde, Arizona, about 123 km north of Phoenix, reaching Bortle 4.

When is the sky darkest in Phoenix?

The sky over Phoenix is darkest around January, December.

Is light pollution in Phoenix getting better or worse?

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

• Camp Verde, Arizona

  Direction

  N

  Distance (km)

  123.4

  SQM

  20.83

  Bortle

  4

• Mohave County, Arizona

  Direction

  NW

  Distance (km)

  227.9

  SQM

  21.16

  Bortle

  4

• San Luis Río Colorado, Sonora

  Direction

  WSW

  Distance (km)

  253.3

  SQM

  21.08

  Bortle

  4

• Santa Rosalia, Sonora

  Direction

  S

  Distance (km)

  262.6

  SQM

  21.18

  Bortle

  4

• Catron County, New Mexico

  Direction

  E

  Distance (km)

  285.2

  SQM

  21.38

  Bortle

  3