Pleasanton, CA Night Sky Brightness
How dark is the sky in Pleasanton, CA?
Pleasanton's sky measures suburban edge here. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Only 41% of the 3,206 cities measured here read darker than Pleasanton.
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, covered fully in the Bortle scale guide.
How far Pleasanton is from a meaningfully darker sky
San Ramon, CA, about 7 miles away as the crow flies, measures in the rural band, one step darker than Pleasanton. Actual driving distance will run longer than that straight-line figure.
San Ramon, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Pleasanton against the rest of the dataset
Pleasanton, CA has a population of about 75,664, one of 3,206 US cities of 10,000 or more residents in this dataset. Ranked against the other 3,206 cities here by the methodology guide's own sampling, Pleasanton comes in at 1,307, darkest to brightest.