YozoraAtlas

How dark is the sky in Košice Region?

Sky darkness for 6 towns and parks in Košice Region, 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 Slovak Karst National Park (21.48, Bortle 4), the brightest Košice (18.82, Bortle 7). Milky Way season in Košice Region runs May to June: on moonless nights the bright core stands clear of the horizon, climbing to about 12° 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 Košice Region with every place marked

Darkest skies in Košice Region

  1. Slovak Karst National ParkBortle 421.48
  2. Latorica Protected Landscape AreaBortle 421.40

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 Košice Region

  1. KošiceBortle 718.82
  2. MichalovceBortle 520.06
  3. Spišská Nová VesBortle 520.07
  4. TrebišovBortle 520.14

All 6 places in Košice Region

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Košice7Latorica Protected Landscape Area4Michalovce5Slovak Karst National Park4Spišská Nová Ves5Trebišov5