California Sky Quality Observations

California Sky Quality Observations
Skykeepers
skykeepers.org founded September 1, 1999

Sky Quality Meter Readings taken in Northern California

Location Name	topozone.com Map Link	Meter Reading	Date Time	Sky Condition Notes, Observer
Alpine County Airport, Indian Creek Recreation Area	topozone map	21.50	9/7/07 22:25	No Moon, Milkyway visible, Some Smoke, Class 3 Bortle Sierra Summer Star Party Location 38.73010 & -119.76805
		21.71	9/7/07 23:55	No Moon, Milkyway visible, Some Smoke, Class 3 Bortle Sierra Summer Star Party Location 38.73010 & -119.76805
		21:61	9/8/07 22:02	No Moon, Milkyway visible, Clouds, Class 3 Bortle Sierra Summer Star Party Location 38.73010 & -119.76805
Black Butte Lake Camp Ground	topozone map	21.61	5/12/07 17:55	No Moon, Milkyway visible, Very Clear SKy, JES
		21.60	5/15/07 03:15	No Moon, Milkyway visible, Very Clear SKy, JES
Blue Canyon-Nyack Airport	topozone map			Measurement anticipated
Bucks Lake, Sundew Camp Ground	topozone map	21.61	7/17/07 22:30	Clear, No moon, JES, Class 3 Bortle
Cameron Park Rotary Club Community Observatory				Measurement anticipated
Citrus Heights, Rusch Park	topozone map
Citrus Heights, Woodbriar Way	topozone map	18.75	8/26/06	Clear, No moon, JES
		18.57	6/09/07 24:00	Clear, No moon, JES
		18.47	6/11/07 04:10	Clear, Crescent moon low in the east. Local street light on. JES
Dear Creek Hills, Sacramento Co. North of Rancho Murieta (topozone)	topozone map	20.5	8/26/06	Clear Sky, No Moon, Milky Way visible, 4.0 Bortle - JES Location, Latrobe Road, at gate to pond 38.52671 & -121.07441
	topozone map	20.36	8/26/06	Clear Sky, No Moon, Milky Way visible, Locaton, Corner of Latrope Road and Stone House Road 38.51902 & -121.10048
	topozone map	20.40	8/11/07 22:00	Clear Sky, No Moon, Milky Way visible, 4.5 Bortle - JES Location at pond, 38.52105 & -121.07042
Doran Campground, Bodega Bay	topozone map			Measurement anticipated
Lodgepole Campground, Cisco Grove	topozone map			Measurement anticipated
Ridgewood Ranch, Mendocino County	topozone map	21.42	6/24/07 03:00	Clear, No Moon, Milky Way visible, Golden Rule RV Park south of space 129
Shingletown Airport,	topozone map	21.61	7/12/07 21:00	Some Clouds, No Moon JES, Class 3 Bortle 2007 Shingletown Star Party
		21.63	7/13/07 22:27	Clear Sky, No Moon JES, Class 3 Bortle 2007 Shingletown Star Party
		21.50	7/13/07 23:15	Some Clouds, No Moon, JES, Class 3 Bortle 2007 Shingletown Star Party
		21.72	7/13/07 23:44	Clear Sky, No Moon JES, Class 3 Bortle 2007 Shingletown Star Party
Sugar Pine Camp Ground, Foresthill	topozone map			Measurement anticipated
Tony Hallas Observatory, Foresthill				Measurement anticipated
Bob Fera Observatory, Foresthill				Measurement anticipated

NOTE: Time is local time 24 and NOT Universal Time

GLOBE at Night, Participation in GLOBE at Night is open to anyone. GLOBE (Global Learning and Observations to Benefit the Environment) is a worldwide hands-on, primary and secondary school-based education and science program. More than half the people on Earth are expected to be living in cities. Because of the ambient light of urban landscapes, many city dwellers have never seen a sky full of stars. This is your chance do document Light Pollution in your area.

Unihedron Sky Quality Meter (SQM) - Makers of the Sky Quality Meter
Unihedron SQM Statistics

The primary Sky Quality Meter used for this data set was received in early September 2006.
Most geographic coordinates are taken with a Magellan eXplorist 100 portable handheld GPS unit or based on street addresses.

Introducing the Bortle Dark-Sky Scale, by Jeff Jeff Burton
The Bortle Dark-Sky Scale, (Sky and Telescope)
John Bortle's Dark Sky Scale, Frosty Drew Observatory

Ben Sugerman's Limiting Magnitude calculations page.

HOW DARK IS MY SKY?

TopoZone.Com California Location Index

15 FEB 2008

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