Sofia Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.14

Bortle class

Class 8 (Class 8)

Darkness Quotient

24%

Dataset

August 2026

City sky

Sofia: The Practical Verdict

Sofia, the capital city of Bulgaria, is heavily influenced by high light pollution, typical of major urban areas. With a poor city sky rating, the conditions here significantly limit astronomical quality. The brightest objects are the most reliable targets due to the urban glow.

From within the city's confines, the Milky Way is completely obscured by the bright urban sky, erasing any hint of its structure. Observers must focus on the Moon, planets, bright stars, and double stars. Narrowband imaging is feasible with care, but deeper sky exploration is not practical. Avoid attempting visual deep-sky observing or capturing broadband galaxies.

For a marked improvement in stargazing quality, heading to Karlievo, Sofia, about 65 km east, offers a Bortle 4 sky and a meaningfully darker environment ideal for serious deep-sky observing.

At a Glance

Overall

Poor city sky - This is a poor city sky. The Milky Way is not visible and most deep-sky observing is unrealistic from the location itself.

Milky Way

Not visible - The Milky Way is erased by the bright urban sky background.

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

Karlievo, Sofia sits about 65 km east and reaches Bortle 4, roughly 15x darker.

Good dark window

Sofia's longest dark windows fall in December and January, with the shortest nights around June and July. Plan deep-sky sessions around the autumn and winter months for the best combination of long nights and true astronomical darkness.

Frequently Asked Questions

Can you see the Milky Way from Sofia?

No. Sofia is a Bortle Class 8 sky with SQM 18.14, 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 Sofia?

Sofia is Bortle Class 8 (SQM 18.14), a poor city sky for astronomy.

Is Sofia good for stargazing?

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

Is Sofia good for astrophotography?

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

What can you observe from Sofia?

Primary targets from Sofia 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 Sofia?

The closest meaningfully darker mapped site is Katrishte, Kyustendil, about 60 km south west of Sofia, reaching Bortle 5.

When is the sky darkest in Sofia?

The sky over Sofia is darkest around January, December.

Is light pollution in Sofia getting better or worse?

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

• Karlievo, Sofia

  Direction

  E

  Distance (km)

  65.1

  SQM

  21.09

  Bortle

  4

• Katrishte, Kyustendil

  Direction

  SW

  Distance (km)

  59.9

  SQM

  20.77

  Bortle

  5

• Crvena Jabuka

  Direction

  WNW

  Distance (km)

  71.9

  SQM

  21.00

  Bortle

  4

• Kremen, Blagoevgrad

  Direction

  SSE

  Distance (km)

  110

  SQM

  21.08

  Bortle

  4

• Spancevac

  Direction

  WSW

  Distance (km)

  125.8

  SQM

  20.62

  Bortle

  5

• Belene, Pleven

  Direction

  NE

  Distance (km)

  176.5

  SQM

  21.06

  Bortle

  4