Curitiba Stargazing & Astronomy Report
Light pollution and stargazing locations near Curitiba
- City
- Curitiba
- Country
- Brazil
- Latitude
- -25.4284
- Longitude
- -49.2733
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 17.67
- Bortle class
- Class 9 (Class 9)
- Darkness Quotient
- 20%
- Dataset
- March 2026
Inner city sky
Stargazing in Curitiba
Curitiba is a major state capital in southern Brazil, known for its highland setting, urban planning and large metropolitan footprint.
The city generally experiences Extreme Light Pollution, with a Darkness Quotient of 20% — placing it among the more light-polluted major cities for astronomy.
For practical observing from within the city, the most reliable targets are the Moon, bright planets, double stars and the brightest open clusters. Fainter deep-sky objects are heavily washed out by the urban skyglow, with only a few showpiece objects such as the Orion Nebula or the brightest globular clusters appearing with compromise.
Genuinely darker skies require leaving the metropolitan glow well behind. The nearest reasonable step up is roughly 140 kilometres to the north-east, near Eldorado, São Paulo, where conditions reach Bortle 4.
The map shows Curitiba as a strong urban light source, with an intense bright core surrounded by a broad halo of elevated skyglow. That glow spreads well beyond the centre, so the city stands out sharply against the darker countryside around it.
The most subdued colours appear mainly away from the urban concentration, especially towards the east over the large dark area on the map and in pockets to the north and north-west between smaller settlements. By contrast, the south-east side is marked by a more continuous chain of brighter zones, suggesting a more built-up corridor and a less clean escape from city light.
Overall, Curitiba is much brighter than its immediate surroundings, but the map also suggests that darkness improves unevenly depending on direction. The cleaner-looking routes are generally towards the north, north-east and parts of the west, while the southern and south-eastern horizons appear more compromised by extended light domes.
What the sky overhead is like
Looking straight up from Curitiba, the zenith is still heavily affected by city light, consistent with an inner-city sky rather than anything close to rural darkness. The background sky remains bright enough to mute contrast across much of the field, especially for faint stars and diffuse deep-sky objects.
Familiar constellations are still there, but they appear in a simplified form, with the brighter pattern stars standing out while weaker links and surrounding star fields fade away. The Milky Way is effectively lost from the city sky, and the sense of depth that comes with a darker overhead view is largely absent.
This is the sort of sky where binocular sessions and casual naked-eye observing work best when focused on bright, high-contrast targets. For rich star fields, nebula hunting or wide-field astrophotography, a trip beyond the metropolitan glow makes a far bigger difference than small gains within the city.
north - marginal
About 15 kilometres north of Curitiba, the sky is still only marginal, at roughly Bortle 6, so urban glow remains very noticeable. Conditions improve strongly further out, with genuinely dark skies reached at around 50 kilometres in this direction.
north-north-east - poor
Around 15 kilometres north-north-east, the sky remains poor at about Bortle 7, with bright background glow still dominating. It improves well with distance though, becoming good by roughly 50 kilometres and reaching genuinely dark conditions at around 100 kilometres.
north-east - poor
At around 15 kilometres to the north-east, conditions are still poor, around Bortle 7, so only brighter targets are comfortable from a quick outing. The direction improves markedly farther out, with good skies by about 50 kilometres and genuinely dark skies at around 100 kilometres.
east-north-east - poor
About 15 kilometres east-north-east of the city, the sky is still poor at around Bortle 7. It becomes a much better option with a longer drive, reaching good conditions by roughly 50 kilometres and genuinely dark skies at around 100 kilometres.
east - poor
Around 15 kilometres east of Curitiba, the sky remains poor, at roughly Bortle 7, with strong residual skyglow. The improvement is slower here at first, but genuinely dark conditions do appear farther out at around 100 kilometres.
east-south-east - poor
At about 15 kilometres east-south-east, the sky is poor, around Bortle 8, so city light remains very intrusive. It does improve to good conditions at roughly 50 kilometres, and the darkest skies in this direction arrive much farther out at around 200 kilometres.
south-east - poor
Around 15 kilometres south-east of the city, conditions are still poor at about Bortle 8. There is a worthwhile improvement by roughly 50 kilometres to good skies, but genuinely dark conditions only turn up much farther out, at around 200 kilometres.
south-south-east - poor
At roughly 15 kilometres south-south-east, the sky is poor, around Bortle 8, with heavy light pollution still obvious. This direction does improve somewhat farther out, but genuinely dark skies are not reached within the sampled distance.
south - poor
Around 15 kilometres south of Curitiba, the sky remains poor at about Bortle 8. There is some meaningful improvement farther out, reaching good conditions by around 50 kilometres, but genuinely dark skies are not available within the sampled range in this direction.
south-south-west - poor
At about 15 kilometres south-south-west, the sky is still poor, around Bortle 8, and the city glow remains prominent. Conditions become better with distance and can reach good territory farther out, but genuinely dark skies are not reached within the sampled radius.
south-west - poor
Around 15 kilometres south-west of the city, the sky remains poor at about Bortle 7. It improves gradually with distance, and genuinely dark conditions are reached at around 100 kilometres in this direction.
west-south-west - poor
At roughly 15 kilometres west-south-west, the sky is poor, around Bortle 7, so the background remains bright for deep-sky work. A longer drive helps a lot here, with good skies by around 50 kilometres and genuinely dark conditions at about 100 kilometres.
west - marginal
About 15 kilometres west of Curitiba, the sky is marginal at roughly Bortle 6, offering a modest improvement over the city but still plenty of glow. Conditions become properly good by around 50 kilometres, with genuinely dark skies reached at about 100 kilometres.
west-north-west - marginal
Around 15 kilometres west-north-west, the sky is marginal, at about Bortle 6, so brighter deep-sky targets begin to improve but the sky is still far from dark. This direction eventually becomes very strong, with good skies by roughly 50 kilometres and excellent darkness much farther out, around 200 kilometres.
north-west - marginal
At roughly 15 kilometres north-west of the city, the sky is marginal at about Bortle 6. It improves to good territory by around 50 kilometres, and genuinely dark skies appear much farther out, at around 200 kilometres.
north-north-west - marginal
About 15 kilometres north-north-west, the sky is marginal, around Bortle 6, with noticeable but reduced urban glow. A longer drive improves things substantially, reaching good conditions by roughly 50 kilometres and genuinely dark skies at around 100 kilometres.
zenith - poor
Directly overhead in Curitiba, the sky is poor, consistent with Bortle 9 conditions at the zenith. You can still pick out the brighter stars and the main outlines of familiar constellations, but the background is bright, faint stars are suppressed, and the Milky Way is effectively invisible from the city centre.
-
Near Eldorado, São Paulo
- Direction
- NE
- Distance (km)
- 141.6
- SQM
- 21.29
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
-
Near Itapeva, São Paulo
- Direction
- NE
- Distance (km)
- 154
- SQM
- 21.27
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
-
Near Arapoti, Paraná
- Direction
- NNW
- Distance (km)
- 181
- SQM
- 21.24
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
Genuinely dark skies are not close at hand from Curitiba, and a worthwhile improvement means a fairly substantial journey out of the city.
The nearest good dark-sky option is about 140 kilometres to the north-east, near Eldorado, São Paulo, where conditions reach Bortle 4. In several directions the sky does improve within a shorter drive, but from the city itself the urban glow remains dominant for quite a long distance.
-
Within 200 km
- Place
- Near Eldorado, São Paulo
- Direction
- NE
- Distance (km)
- 141.6
- SQM
- 21.29
- Bortle
- 4
Long-term sky brightness trend
Curitiba's long-term measurements are fairly steady, with only a slight improvement over time rather than a dramatic change. The earliest reading in the series was 17.56 SQM and the latest is 17.67 SQM, a small upward shift.
Across 75 datasets, the mean value is 17.87 SQM, with readings ranging from 17.56 to 18.38 SQM. The trend slope is modest, so while the sky may have edged a little darker over the years, the city remains firmly in a very bright urban regime for stargazing.
In practical terms, that means observers in Curitiba should not expect the character of the night sky to have changed much from year to year. The same broad advice still applies: bright Solar System targets and a handful of showcase objects are the realistic focus from within the city.
From within Curitiba, bright and compact targets are the sensible choice. The Moon and planets cope well with urban conditions, and double stars or a few bright open clusters can still make rewarding observing projects.
A small number of headline deep-sky objects may be possible with patience, careful shielding from stray light and realistic expectations. The Orion Nebula and the brightest globular clusters are the sort of objects that can still show up, but with noticeably reduced contrast.
For the Milky Way, faint galaxies, large diffuse nebulae and meteor watching, a darker site outside the metropolitan glow makes an enormous difference. These are the targets that really reward the drive away from the city.
- Moon
- planets
- double stars
- brightest open clusters
- Orion Nebula (M42)
- brightest globular clusters
- Milky Way
- faint galaxies
- broadband nebulae
- meteor showers
Can you see stars from Curitiba?
Yes — you can still see stars from Curitiba, but mostly the brighter ones. The main constellation patterns remain visible, while many fainter stars are lost in the city's bright skyglow.
Can you see the Milky Way from Curitiba?
Not realistically from the city itself. With Curitiba's very bright urban sky, the Milky Way is effectively washed out from normal in-city observing spots.
What Bortle class is Curitiba?
Curitiba is Bortle Class 9, which corresponds to an inner-city sky. In practical terms, that means severe light pollution and a strong focus on the brightest astronomical targets.
What is the SQM in Curitiba?
The measured sky brightness is 17.67 SQM. That is firmly in bright urban territory rather than anything approaching rural darkness.
Where are the nearest dark skies to Curitiba?
The nearest listed reasonable dark-sky site is near Eldorado, São Paulo, about 141.6 kilometres to the north-east, where conditions reach Bortle 4. Other nearby options in a similar direction include Near Itapeva, São Paulo and, farther away, Near Arapoti, Paraná.
Is Curitiba good for astrophotography?
It can work for lunar, planetary and some bright narrow-field targets, but it is not a strong city for deep-sky astrophotography from within the urban area. For nebulae, galaxies and wide-field nightscapes, travelling to a darker site is much more rewarding.
How far do you need to drive from Curitiba for darker skies?
For a clearly better sky, you need to get well outside the metropolitan glow. A good benchmark is about 140 kilometres to the north-east for Bortle 4 conditions near Eldorado, São Paulo, although some directions begin to improve noticeably within a shorter drive.