Buenos Aires Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.04

Bortle class

Class 9 (Class 9)

Darkness Quotient

16%

Dataset

April 2026

Inner city sky

Buenos Aires: The Practical Verdict

Buenos Aires is a major world city with extreme light pollution, sitting at the centre of a dense urban environment. The sky's brightness severely limits observational quality, classifying it under the 'Severe urban sky' label.

From within Buenos Aires, the Milky Way is completely absent, and deep-sky observing is effectively impossible. Observable targets include the Moon, planets, and double stars, with narrowband imaging possible but challenging due to pervasive sky glow.

To substantially improve your stargazing prospects, consider travelling north to Paysandú, approximately 285 km away. This site offers a Bortle 3 sky, making deep-sky targets much more accessible and worth the drive for serious observers.

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

Paysandú sits about 283 km north and reaches Bortle 3, roughly 52x darker.

Good dark window

Buenos Aires's longest dark windows fall in June and July, with the shortest nights around December and January. For deep-sky imaging, winter gives the best combination of long nights and true astronomical darkness.

Frequently Asked Questions

Can you see the Milky Way from Buenos Aires?

No. Buenos Aires is a Bortle Class 9 sky with SQM 17.04, 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 Buenos Aires?

Buenos Aires is Bortle Class 9 (SQM 17.04), a severe urban sky for astronomy.

Is Buenos Aires good for stargazing?

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

Is Buenos Aires good for astrophotography?

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

What can you observe from Buenos Aires?

Primary targets from Buenos Aires 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 Buenos Aires?

The closest meaningfully darker mapped site is Magdalena, Buenos Aires, about 97 km east south east of Buenos Aires, reaching Bortle 6.

When is the sky darkest in Buenos Aires?

The sky over Buenos Aires is darkest around June, July.

Is light pollution in Buenos Aires getting better or worse?

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

• Magdalena, Buenos Aires

  Direction

  ESE

  Distance (km)

  96.9

  SQM

  19.82

  Bortle

  6

• Partido de Castelli, Buenos Aires

  Direction

  SSE

  Distance (km)

  185.9

  SQM

  20.55

  Bortle

  5

• Durazno

  Direction

  NE

  Distance (km)

  279.1

  SQM

  21.28

  Bortle

  4

• Paysandú

  Direction

  N

  Distance (km)

  283.2

  SQM

  21.34

  Bortle

  3

• Partido de Ayacucho, Buenos Aires

  Direction

  S

  Distance (km)

  262.9

  SQM

  20.90

  Bortle

  4

• Distrito Raíces al Sur, Entre Ríos Province

  Direction

  NNW

  Distance (km)

  286.5

  SQM

  21.17

  Bortle

  4