Belo Horizonte Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.96

Bortle class

Class 9 (Class 9)

Darkness Quotient

23%

Dataset

May 2026

Inner city sky

Belo Horizonte: The Practical Verdict

Belo Horizonte, the major city in Minas Gerais, Brazil, is a place where urban density and high light pollution severely impact stargazing. The sky is classified as having severe urban sky conditions, with the Milky Way completely absent from view. The primary limiting factor is the brightness of the city lights themselves.

In this light-polluted environment, the best practical targets are the Moon, planets, and bright stars, along with narrowband imaging if approached carefully. Double stars and solar system events remain visible. However, deep-sky observations, especially of faint nebulae and galaxies, are strongly impaired and should be avoided.

For those seeking a significant improvement in sky quality, travelling to a site 186 km east-south-east, which offers Bortle 4 conditions, is advised. This site provides a reasonable upgrade for deep-sky stargazing, making the drive worthwhile for 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

186 km ESE sits about 186 km east south east and reaches Bortle 4, roughly 17x darker.

Good dark window

Belo Horizonte retains astronomical darkness throughout the year, so seasonality is less extreme than at higher latitudes. The main limitation is light pollution, not the length of the dark window.

Frequently Asked Questions

Can you see the Milky Way from Belo Horizonte?

No. Belo Horizonte is a Bortle Class 9 sky with SQM 17.96, 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 Belo Horizonte?

Belo Horizonte is Bortle Class 9 (SQM 17.96), a severe urban sky for astronomy.

Is Belo Horizonte good for stargazing?

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

Is Belo Horizonte good for astrophotography?

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

What can you observe from Belo Horizonte?

Primary targets from Belo Horizonte 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 Belo Horizonte?

The closest meaningfully darker mapped site is Santa Efigênia, Minas Gerais, about 42 km south south east of Belo Horizonte, reaching Bortle 6.

When is the sky darkest in Belo Horizonte?

The sky over Belo Horizonte is darkest around June, July.

Is light pollution in Belo Horizonte getting better or worse?

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

• Santa Efigênia, Minas Gerais

  Direction

  SSE

  Distance (km)

  41.6

  SQM

  20.18

  Bortle

  6

• 48 km ENE

  Direction

  ENE

  Distance (km)

  48.4

  SQM

  20.04

  Bortle

  6

• 186 km ESE

  Direction

  ESE

  Distance (km)

  185.7

  SQM

  21.03

  Bortle

  4

• Piraúba, Minas Gerais

  Direction

  SSE

  Distance (km)

  179.2

  SQM

  20.83

  Bortle

  4