Sofia Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.96

Bortle class

Class 9 (Class 9)

Darkness Quotient

23%

Dataset

April 2026

Inner city sky

Sofia: The Practical Verdict

Sofia, a major city and capital of Bulgaria, is heavily affected by urban brightness due to its size and dense development. The overall sky quality is characterised as a severe urban sky, unsuitable for deep-sky observations or Milky Way viewing.

From within the city, stargazing is limited to bright celestial objects such as the Moon, planets, bright stars, and double stars. Narrowband imaging is possible with care, targeting only the brightest nebulae. However, deeper astrophotography and broadband observing are virtually impossible due to the pervasive light pollution dominating the entire sky.

For a significantly improved experience, travelling north-north-west to Berkovitsa, Montana, about 55 km away, offers a meaningful upgrade with darker skies suitable for deep-sky astronomy. This nearby site provides opportunities for observing fainter deep-sky objects, free from the intense glow of Sofia’s urban surroundings.

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

Berkovitsa, Montana sits about 57 km north north west 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 9 sky with SQM 17.96, 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 9 (SQM 17.96), a severe urban sky for astronomy.

Is Sofia good for stargazing?

Not for serious deep-sky observing. Sofia is a severe urban 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 Berkovitsa, Montana, about 57 km north north west of Sofia, reaching Bortle 4.

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.

• Berkovitsa, Montana

  Direction

  NNW

  Distance (km)

  56.7

  SQM

  20.88

  Bortle

  4

• Tsarkvishte, Sofia

  Direction

  E

  Distance (km)

  62.4

  SQM

  20.20

  Bortle

  6

• Mezgraja

  Direction

  WNW

  Distance (km)

  90.9

  SQM

  20.65

  Bortle

  5

• Mizia, Vratsa

  Direction

  NNE

  Distance (km)

  105.3

  SQM

  20.89

  Bortle

  4

• Gospodintsi, Blagoevgrad

  Direction

  SSE

  Distance (km)

  119.9

  SQM

  21.03

  Bortle

  4

• Gornja Susaja

  Direction

  W

  Distance (km)

  142.1

  SQM

  20.75

  Bortle

  5