Buenos Aires Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

16.92

Bortle class

Class 9 (Class 9)

Darkness Quotient

15%

Dataset

August 2026

Inner city sky

Buenos Aires: The Practical Verdict

Buenos Aires, an extensive urban centre in Argentina, presents challenging astronomical conditions. The severe urban sky means that the light pollution is overwhelming, registering at extreme levels. The primary limiting factor here is the intense light dome, which obscures all but the brightest celestial objects.

Observing from Buenos Aires allows primarily for views of the Moon, planets, and several bright stars. Double stars and solar system events can still provide some interest. However, the Milky Way is not visible, making visual deep-sky observing unfeasible. Narrowband imaging requires careful planning and is only feasible for the brightest nebulae.

The best nearby option for considerably darker skies lies about 280 km to the north-east. This location, at 21.56 SQM, offers an escape from the extreme light pollution, promising a more diverse array of celestial targets.

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

282 km NE sits about 282 km north east and reaches Bortle 3, roughly 72x 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 16.92, 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 16.92), 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 Arroyo Borches, Buenos Aires, about 57 km north north west 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?

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

• Arroyo Borches, Buenos Aires

  Direction

  NNW

  Distance (km)

  56.9

  SQM

  20.12

  Bortle

  6

• El Bote, Buenos Aires

  Direction

  SE

  Distance (km)

  144.8

  SQM

  19.80

  Bortle

  6

• 282 km NE

  Direction

  NE

  Distance (km)

  282.4

  SQM

  21.56

  Bortle

  3

• Casupá, Lavalleja

  Direction

  E

  Distance (km)

  275.8

  SQM

  21.16

  Bortle

  4

• Paso Monzón, Paysandú

  Direction

  N

  Distance (km)

  279.5

  SQM

  21.11

  Bortle

  4

• Barrio Alborada, Entre Ríos Province

  Direction

  NNW

  Distance (km)

  290.9

  SQM

  21.26

  Bortle

  4