Lima Stargazing & Astronomy Report

Light pollution and stargazing locations near Lima

City
Lima
Country
Peru
Latitude
-12.0464
Longitude
-77.0428

Key Sky Quality Metrics

SQM (mag/arcsec²)
16.98
Bortle class
Class 9 (Class 9)
Darkness Quotient
16%
Dataset
March 2026

Inner city sky

Stargazing in Lima

Lima is Peru’s vast coastal capital on the central Pacific shore, a major South American metropolis known for its dense urban sprawl and dramatic setting between ocean and desert. The city generally experiences Extreme Light Pollution, with a Darkness Quotient of just 16% — placing it among the most light-polluted major cities in the world.

For practical observing from within the city, the most reliable targets are the Moon, planets, double stars and the brightest open clusters. Fainter deep-sky objects are heavily washed out by the urban glow, with only a few showpiece objects offering limited views.

Truly dark skies are not close at hand from Lima, and a serious improvement requires a long drive away from the capital. The nearest top-quality site in the supplied data is around 295 kilometres to the east, near Monzón, Huánuco, with other strong options also lying inland to the east and south-east.

The map shows Lima as an intense bright core with a large white-pink centre, surrounded by broad red, orange, yellow and green halos that spread well beyond the urban footprint. This is the classic signature of a very large, strongly illuminated metropolitan area whose glow dominates the surrounding coast.

The Pacific side is markedly different: to the west the map quickly falls away into darker tones over the ocean, but that does not help much for land-based observing because the city’s light dome still expands strongly in that direction. Along the coast north and south of the main core, smaller bright knots continue the chain of development and keep the shoreline noticeably lit.

The darker terrain appears inland, especially towards the east, north-east and south-east, where the bright halo thins and gives way to much darker grey and black regions. Compared with its surroundings, Lima is by far the dominant source of artificial sky brightness in the map crop, with the best escape routes clearly lying away from the coastal strip and into the interior.

Looking up from the city

From central Lima, the sky overhead is dominated by a strong urban glow rather than a genuinely dark background. Even looking straight up, the city sits in Bortle 9 territory, so the sky tends to appear bright and low-contrast, with only the more obvious stars and familiar constellations punching through clearly.

In practice, this means the brightest patterns remain recognisable, but the richer background star field is badly thinned out. The Milky Way is effectively lost from the city, and subtle naked-eye detail is replaced by a washed-out sky that favours bright, high-contrast targets.

north - poor

Fifteen kilometres north of Lima, the sky is still poor for astronomy, remaining in Bortle 9 conditions with heavy urban glare. A much darker sky does become reachable farther out, with Bortle 3 conditions appearing at around 100 kilometres and even darker skies beyond that.

north-north-east - poor

At around 15 kilometres to the north-north-east, conditions are still poor, with the sky remaining in Bortle 9 territory. The outlook improves markedly farther inland, reaching good conditions by about 50 kilometres and genuinely dark sky at around 100 kilometres.

north-east - poor

To the north-east, a short drive still leaves you under poor skies, with the 15-kilometre sample at Bortle 8. This is one of the more promising escape directions, though, with good conditions around 50 kilometres out and excellent darkness by about 100 kilometres.

east-north-east - poor

Fifteen kilometres east-north-east of the city, the sky remains poor and heavily light-polluted at Bortle 9. Conditions improve steadily inland, with fair skies by roughly 50 kilometres and genuinely dark sky around 100 kilometres away.

east - poor

A short journey east still leaves you under poor skies, with the 15-kilometre sample firmly in Bortle 9. Much darker conditions do arrive farther from the city, with a strong improvement by about 100 kilometres.

east-south-east - poor

East-south-east of Lima, the sky is still poor at 15 kilometres, remaining in Bortle 9 conditions. The real improvement comes farther out, with moderate gains first and genuinely dark sky at around 100 kilometres.

south-east - poor

At 15 kilometres to the south-east, the sky is still poor for serious observing, with Bortle 9 brightness close to the city. Darker skies are reachable farther out in this direction, with genuinely dark conditions appearing at about 100 kilometres.

south-south-east - poor

South-south-east, the sky remains poor at 15 kilometres, still deep in Bortle 9 urban glow. It does improve with distance, reaching good conditions at around 100 kilometres, but genuinely dark sky is not reached within the sampled radius in this direction.

south - poor

To the south, a quick drive only improves matters slightly, and the 15-kilometre sky is still poor at Bortle 8. Much darker conditions are available farther out, with genuinely dark sky reached at about 100 kilometres.

south-south-west - poor

The south-south-west direction remains poor at 15 kilometres, with the sky still in Bortle 8 conditions. It becomes much better with distance, reaching good conditions around 50 kilometres out and genuinely dark sky by about 100 kilometres.

south-west - poor

South-west of the city, the 15-kilometre sky is still poor, sitting at Bortle 7 rather than anything truly dark. There is a worthwhile improvement farther out, with good conditions around 50 kilometres and genuinely dark sky at roughly 100 kilometres.

west-south-west - poor

At 15 kilometres west-south-west, the sky remains poor in Bortle 8 conditions despite some improvement over the city centre. A stronger step up appears farther out, with good skies by about 50 kilometres and genuinely dark conditions around 100 kilometres away.

west - poor

Looking west from Lima, the sky at 15 kilometres is still poor, around Bortle 8. It improves significantly with distance, reaching good conditions by about 50 kilometres and genuinely dark sky at around 100 kilometres.

west-north-west - poor

West-north-west of the city, the 15-kilometre sample remains poor at Bortle 8. Better skies do lie farther away, with fair-to-good improvement first and genuinely dark conditions by about 100 kilometres.

north-west - poor

To the north-west, a short drive still leaves you under poor skies, with the 15-kilometre point remaining in Bortle 9. The situation improves much farther out, with genuinely dark sky appearing at around 100 kilometres.

north-north-west - poor

North-north-west is still poor at 15 kilometres, where the sky remains in Bortle 9 conditions. This direction improves more slowly than most, with only moderate gains at first and genuinely dark sky not appearing until around 200 kilometres out.

zenith - poor

Looking straight up from Lima, the zenith is poor, with a Bortle 9 sky and an SQM reading of 16.98. The brightest stars and the main outlines of familiar constellations can still be picked out, but the background sky is bright, the fainter star field is badly reduced, and the Milky Way is not visible.

  • Near MonzĂłn, Huánuco
    Direction
    E
    Distance (km)
    294.7
    SQM
    21.74
    Bortle
    2

    Milky Way, faint nebulae, deep-sky imaging

  • Near Mazamari, JunĂ­n
    Direction
    ENE
    Distance (km)
    290.4
    SQM
    21.65
    Bortle
    3

    Milky Way visible, broadband DSO imaging

  • Near Pilpichaca, Huancavelica
    Direction
    SE
    Distance (km)
    300.4
    SQM
    21.45
    Bortle
    3

    Milky Way visible, broadband DSO imaging

Genuinely dark skies require a significant journey from Lima rather than a quick hop out of town. The nearest clearly excellent option in the supplied data is about 295 kilometres to the east at Near Monzón, Huánuco, while Near Mazamari, Junín and Near Pilpichaca, Huancavelica offer similarly dark conditions a little farther inland.

There is some improvement after leaving the city behind, especially inland, but the real step-change to truly dark sky only arrives much farther from the capital.

  • Within 500 km
    Place
    Near Monzón, Huánuco
    Direction
    E
    Distance (km)
    294.7
    SQM
    21.74
    Bortle
    2

Long-term trend

Lima’s night sky has shown a gradual long-term decline in darkness across the available record. The earliest reading in the series was 17.37 SQM, while the latest stands at 16.98 SQM, making this the dimmest point in the dataset.

The overall trend works out at roughly -0.02 SQM per year, which is a slow but persistent brightening of the sky. Across all 76 datasets, the city has ranged from 16.98 to 18.66 SQM, so although conditions do vary, the broader direction has been towards a brighter urban night.

From within Lima itself, stargazing is mostly about bright, high-contrast targets. The Moon and planets show well, double stars remain rewarding, and a handful of the brightest clusters can still be worth a look.

A few showpiece deep-sky objects may be possible with care, especially if they are high in the sky, but contrast is the limiting factor. For the Milky Way, faint galaxies, wide nebulae and the full impact of meteor activity, you will get a vastly better experience by travelling well away from the city.

  • Moon
  • planets
  • double stars
  • brightest open clusters
  • bright nebulae such as M42
  • the brightest globular clusters
  • Milky Way
  • faint galaxies
  • broadband nebulae
  • meteor showers

Can you see stars from Lima?

Yes — you can still see stars from Lima, but far fewer than from a dark rural site. The brightest stars and the main constellation patterns remain visible, while fainter stars are lost in the city glow.

Can you see the Milky Way from Lima?

Not realistically from within the city. With Lima at Bortle 9 and 16.98 SQM, the Milky Way is effectively washed out by urban light pollution.

What Bortle class is Lima?

Lima is Bortle Class 9, which is an inner-city sky. In practical terms, that means severe light pollution and a strong loss of faint celestial detail.

What is the SQM reading for Lima?

The measured sky brightness for Lima is 16.98 SQM. That is a bright urban sky rather than a dark astronomical one.

Where are the nearest dark skies to Lima?

The nearest dark sites in the supplied data are inland rather than along the immediate coast. The closest listed option is Near Mazamari, Junín at 290.4 kilometres to the east-north-east, while the darkest listed site is Near Monzón, Huánuco at 294.7 kilometres to the east.

Is Lima good for astrophotography?

It is suitable for lunar, planetary and some bright-target astrophotography, but not ideal for faint deep-sky imaging from within the city. For nebulae, galaxies and Milky Way work, you would want to travel far beyond the urban glow.

How far do you need to drive from Lima for dark skies?

For a truly dark-sky experience, you are looking at roughly 290 to 300 kilometres from the city based on the listed nearby sites. The best supplied options lie inland to the east, east-north-east and south-east.