How dark is the sky in Derby, CT?

Derby reads as suburban on this dataset's scale. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 68.9% of the 3,206 cities measured here read darker than Derby.

Worth remembering: this is satellite radiance, not a ground observation. A true Bortle rating needs a human eye at night, this is the closest large-scale substitute.

Where to go for a darker sky near Derby

Ansonia, CT, about 1 miles away as the crow flies, measures in the suburban edge band, one step darker than Derby. Actual driving distance will run longer than that straight-line figure.

Ansonia, CT is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

Derby against the rest of the dataset

Derby, CT has a population of about 12,915, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Derby ranks 2,198 from darkest to brightest, 1 being the darkest measured.