IObservingConditions.SkyBrightness Property

IObservingConditionsSkyBrightness Property

Sky brightness at the observatory

Namespace: ASCOM.DeviceInterface
Assembly: ASCOM.DeviceInterfaces (in ASCOM.DeviceInterfaces.dll) Version: 6.0.0.0 (6.2.0.2774)

Syntax

double SkyBrightness { get; }

ReadOnly Property SkyBrightness As Double
	Get

property double SkyBrightness {
	double get ();
}

Type: Double
Sky brightness (Lux)

Exceptions

Exception	Condition
PropertyNotImplementedException	If this property is not available.
NotConnectedException	If the device is not connected and this information is only available when connected.

Remarks

Optional property, can throw a PropertyNotImplementedException

This property returns the sky brightness measured in Lux.

Luminance Examples in Lux

Illuminance	Surfaces illuminated by:
0.0001 lux	Moonless, overcast night sky (starlight)
0.002 lux	Moonless clear night sky with airglow
0.27–1.0 lux	Full moon on a clear night
3.4 lux	Dark limit of civil twilight under a clear sky
50 lux	Family living room lights (Australia, 1998)
80 lux	Office building hallway/toilet lighting
100 lux	Very dark overcast day
320–500 lux	Office lighting
400 lux	Sunrise or sunset on a clear day.
1000 lux	Overcast day; typical TV studio lighting
10000–25000 lux	Full daylight (not direct sun)
32000–100000 lux	Direct sunlight