YozoraAtlas

How dark is the sky in Borsod-Abaúj-Zemplén?

Sky darkness for 5 towns and parks in Borsod-Abaúj-Zemplén, worked out from NASA satellite images of light at night (2025). 2 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Aggtelek National Park (21.49, Bortle 4), the brightest Miskolc (19.11, Bortle 6). Milky Way season in Borsod-Abaúj-Zemplén runs May to July: on moonless nights the bright core stands clear of the horizon, climbing to about 13° at its highest.

19 Bortle class, 1 pristine to 9 city center park or dark-sky place city

Numbers like 21.95 or 16.97 are the brightness of the sky overhead on a clear, moonless night, in mag/arcsec². The scale runs backwards: a lower number means a brighter sky, from about 22 for a natural sky to about 17 in a city center.
How the readings are made

NASA satellite night-lights map of Borsod-Abaúj-Zemplén with every place marked

Darkest skies in Borsod-Abaúj-Zemplén

  1. Aggtelek National ParkBortle 421.49
  2. Bükk National ParkBortle 421.20

Among the places on this site. Plenty of land between them is just as dark, with no town or park to name it by.

Brightest city skies in Borsod-Abaúj-Zemplén

  1. MiskolcBortle 619.11
  2. KazincbarcikaBortle 519.73
  3. ÓzdBortle 520.38

All 5 places in Borsod-Abaúj-Zemplén

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Aggtelek National Park4Bükk National Park4Kazincbarcika5Miskolc6Ózd5