Brownsville Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.78

Bortle class

Class 9 (Class 9)

Darkness Quotient

21%

Dataset

August 2026

Inner city sky

Brownsville: The Practical Verdict

Brownsville in Texas is a small city with a suburban setting, which unfortunately does not aid in observing the night sky. The sky falls into the 'Severe urban sky' category due to high light pollution. The Milky Way is not visible, and the city lights heavily impair many celestial targets.

From here, stargazing is limited to bright celestial objects such as the Moon, planets, bright stars, and solar system events. Double stars remain possible targets. However, visual deep-sky observing should be avoided, and widefield Milky Way images are unfeasible under these conditions.

For a significant improvement, travelling to Willacy County, Texas, which is around a two-hour drive north-north-east, offers a much darker Bortle 3 sky. This will be more suitable for those interested in deep-sky observations and broadband imaging.

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

Willacy County, Texas sits about 78 km north north east and reaches Bortle 3, roughly 30x darker.

Good dark window

Brownsville'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 Brownsville?

No. Brownsville is a Bortle Class 9 sky with SQM 17.78, 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 Brownsville?

Brownsville is Bortle Class 9 (SQM 17.78), a severe urban sky for astronomy.

Is Brownsville good for stargazing?

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

Is Brownsville good for astrophotography?

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

What can you observe from Brownsville?

Primary targets from Brownsville 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 Brownsville?

The closest meaningfully darker mapped site is Los Fresnos, Texas, about 19 km south of Brownsville, reaching Bortle 7.

When is the sky darkest in Brownsville?

The sky over Brownsville is darkest around January, December.

Is light pollution in Brownsville getting better or worse?

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

• Matamoros, Tamaulipas

  Direction

  ESE

  Distance (km)

  25.1

  SQM

  20.02

  Bortle

  6

• Palmito Hill Road, Texas

  Direction

  ENE

  Distance (km)

  19.8

  SQM

  19.63

  Bortle

  6

• Cameron County, Texas

  Direction

  NNE

  Distance (km)

  45

  SQM

  20.60

  Bortle

  5

• San Lorenzo, Tamaulipas

  Direction

  SSE

  Distance (km)

  43.8

  SQM

  20.37

  Bortle

  5

• Los Fresnos, Texas

  Direction

  S

  Distance (km)

  18.8

  SQM

  19.34

  Bortle

  7

• Willacy County, Texas

  Direction

  NNE

  Distance (km)

  77.8

  SQM

  21.49

  Bortle

  3