Franklin Park, IL Night Sky Brightness
What the night sky looks like over Franklin Park, IL
Satellite radiance puts Franklin Park in the urban band. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Franklin Park's sky is brighter than 87.7% of the 3,206 cities in this dataset.
The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class - the Bortle scale guide covers why.
How far Franklin Park is from a meaningfully darker sky
3 miles from Franklin Park, straight-line, sits Elmwood Park, IL, the nearest city here with a darker sky than Franklin Park's own urban band.
Elmwood Park, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Franklin Park against the rest of the dataset
Franklin Park, IL has a population of about 18,110, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Franklin Park ranks 2,795 from darkest to brightest, 1 being the darkest measured, by the sampling the methodology guide documents.