Smeird Astro Weather
Night mission control

Monday 7 September 2026

A complete observing plan, from sunset through morning twilight.

Ten-day outlook
Possible imaging0h

No strict three-way overlap

Full darkness6h 47m

Astronomical darkness

Moon-free sky6h 45m

Waning crescent · 16% lit

Clearest hour100%

At 20:00

Peak seeing0.0/10

Best atmospheric stability

Avg transparency5.5/10

Mean column clarity

Night at a glance

Observing timeline

See exactly where usable sky, full darkness and a moon-free horizon overlap.

No ideal imaging window · green sky, full darkness and moon below do not overlapWaning crescent · 16% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
20:00 · 100% cloud · seeing 0.0/1021:00 · 100% cloud · seeing 0.0/1022:00 · 100% cloud · seeing 0.0/1023:00 · 100% cloud · seeing 0.0/1000:00 · 100% cloud · seeing 0.0/1001:00 · 100% cloud · seeing 0.0/1002:00 · 100% cloud · seeing 0.0/1003:00 · 100% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/1005:00 · 100% cloud · seeing 0.0/1006:00 · 100% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 16% illuminated
19:3820:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:19
GoodMixedPoorFull darknessMoon above
Hour by hour

Condition matrix

Exact values stay visible; stronger imaging conditions are shown in green.

Local timeHourly forecast
20:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:00
Imaging qualityCloud + seeing
PoorPoorPoorPoorPoorPoorPoorPoorPoorPoorPoor
Total cloudLower is better
100%100%100%100%100%100%100%100%100%100%100%
SeeingHigher is better
0.0/100.0/100.0/100.0/100.0/100.0/100.0/100.0/100.0/100.0/100.0/10
TransparencyHigher is better
7.0/106.0/106.0/106.0/106.0/106.0/105.0/105.0/105.0/105.0/104.0/10
PickeringHigher is better
6.0/106.0/106.0/106.0/106.0/106.0/106.0/106.0/106.0/106.0/103.0/10
Low cloudLower is better
0%0%0%0%8%0%5%88%14%6%100%
Mid cloudLower is better
100%100%100%100%100%100%100%100%100%100%100%
High cloudLower is better
100%100%100%100%100%100%100%100%93%0%0%
DarknessTwilight stage
NauticalAstroDarkDarkDarkDarkDarkDarkAstroNauticalCivil
MoonHorizon position
DownDownDownDownDownDownUpUpUpUpUp
Seeing

Atmospheric steadiness, using cloud, turbulence and low-level wind. Higher values mean sharper potential detail.

Transparency

Clarity through the full air column, influenced by atmospheric moisture. Higher values favour faint targets.

Pickering

Expected light distortion from turbulence, wind and temperature changes aloft. Higher values mean steadier stars.

Astronomy planner

Ten-day night-sky outlook

Scan cloud cover, sunset, sunrise and moon timing to find the strongest observing windows.

Forecast view
ThuThursday 3 September

0hPossible imaging
99%Average cloud
Waning gibbous · 55%19:47 sunset · 6:13 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapWaning gibbous · 55% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
20:00 · 100% cloud · seeing 0.0/1021:00 · 100% cloud · seeing 0.0/1022:00 · 100% cloud · seeing 0.0/1023:00 · 85% cloud · seeing 0.0/1000:00 · 100% cloud · seeing 0.0/1001:00 · 100% cloud · seeing 0.0/1002:00 · 100% cloud · seeing 0.0/1003:00 · 100% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/1005:00 · 100% cloud · seeing 0.0/1006:00 · 100% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 55% illuminated
19:4720:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:13
GoodMixedPoorFull darknessMoon above
FriFriday 4 September

Sunny

0hPossible imaging
29%Average cloud
Last quarter · 44%19:44 sunset · 6:15 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapLast quarter · 44% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
20:00 · 100% cloud · seeing 0.0/1021:00 · 100% cloud · seeing 0.0/1022:00 · 99% cloud · seeing 0.0/1023:00 · 0% cloud · seeing 8.0/1000:00 · 0% cloud · seeing 8.0/1001:00 · 0% cloud · seeing 8.0/1002:00 · 0% cloud · seeing 8.0/1003:00 · 0% cloud · seeing 8.0/1004:00 · 0% cloud · seeing 8.0/1005:00 · 0% cloud · seeing 8.0/1006:00 · 0% cloud · seeing 8.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 44% illuminated
19:4420:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:15
GoodMixedPoorFull darknessMoon above
SatSaturday 5 September

Fair

0hPossible imaging
83%Average cloud
Last quarter · 34%19:42 sunset · 6:16 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapLast quarter · 34% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
20:00 · 77% cloud · seeing 1.0/1021:00 · 69% cloud · seeing 1.0/1022:00 · 63% cloud · seeing 1.0/1023:00 · 73% cloud · seeing 1.0/1000:00 · 87% cloud · seeing 0.0/1001:00 · 82% cloud · seeing 0.0/1002:00 · 87% cloud · seeing 0.0/1003:00 · 95% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/1005:00 · 93% cloud · seeing 0.0/1006:00 · 83% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 34% illuminated
19:4220:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:16
GoodMixedPoorFull darknessMoon above
SunSunday 6 September

Fair

1h 20mPossible imaging
65%Average cloud
Waning crescent · 24%19:40 sunset · 6:18 sunrise
21:39–23:00 ideal overlap · green sky, full darkness, moon belowWaning crescent · 24% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
20:00 · 0% cloud · seeing 8.0/1021:00 · 5% cloud · seeing 8.0/1022:00 · 6% cloud · seeing 7.0/1023:00 · 37% cloud · seeing 2.0/1000:00 · 96% cloud · seeing 0.0/1001:00 · 99% cloud · seeing 0.0/1002:00 · 97% cloud · seeing 0.0/1003:00 · 99% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/1005:00 · 100% cloud · seeing 0.0/1006:00 · 100% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 24% illuminated
Strongest overlap starts 21:39Strongest overlap ends 23:00Best imaging windowBest
19:4020:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:18
GoodMixedPoorFull darknessMoon aboveBest window bounds
MonMonday 7 September

Partly Cloudy

0hPossible imaging
100%Average cloud
Waning crescent · 16%19:38 sunset · 6:19 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapWaning crescent · 16% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
20:00 · 100% cloud · seeing 0.0/1021:00 · 100% cloud · seeing 0.0/1022:00 · 100% cloud · seeing 0.0/1023:00 · 100% cloud · seeing 0.0/1000:00 · 100% cloud · seeing 0.0/1001:00 · 100% cloud · seeing 0.0/1002:00 · 100% cloud · seeing 0.0/1003:00 · 100% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/1005:00 · 100% cloud · seeing 0.0/1006:00 · 100% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 16% illuminated
19:3820:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:19
GoodMixedPoorFull darknessMoon above
TueTuesday 8 September

Sunny

6h 5mPossible imaging
3%Average cloud
Waning crescent · 9%19:35 sunset · 6:21 sunrise
22:00–04:05 ideal overlap · green sky, full darkness, moon belowWaning crescent · 9% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
22:00 · 0% cloud · seeing 6.0/1001:00 · 5% cloud · seeing 6.0/1004:00 · 5% cloud · seeing 8.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 9% illuminated
Strongest overlap starts 22:00Strongest overlap ends 04:05Best imaging windowBest
19:3520:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:21
GoodMixedPoorFull darknessMoon aboveBest window bounds
WedWednesday 9 September

Partly Cloudy

0hPossible imaging
100%Average cloud
Waning crescent · 4%19:33 sunset · 6:23 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapWaning crescent · 4% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
22:00 · 100% cloud · seeing 0.0/1001:00 · 100% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizonMoon above horizon · 4% illuminated
19:3320:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:23
GoodMixedPoorFull darknessMoon above
ThuThursday 10 September

Partly Cloudy

0hPossible imaging
100%Average cloud
New moon · 1%19:31 sunset · 6:24 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapNew moon · 1% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
22:00 · 100% cloud · seeing 0.0/1001:00 · 100% cloud · seeing 0.0/1004:00 · 97% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizon
19:3120:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:24
GoodMixedPoorFull darknessMoon above
FriFriday 11 September

Sunny

3hPossible imaging
51%Average cloud
New moon · 0%19:28 sunset · 6:26 sunrise
22:00–01:00 ideal overlap · green sky, full darkness, moon belowNew moon · 0% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
22:00 · 5% cloud · seeing 8.0/1001:00 · 100% cloud · seeing 0.0/1004:00 · 40% cloud · seeing 2.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizon
Strongest overlap starts 22:00Strongest overlap ends 01:00Best imaging windowBest
19:2820:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:26
GoodMixedPoorFull darknessMoon aboveBest window bounds
SatSaturday 12 September

Cloudy

0hPossible imaging
100%Average cloud
New moon · 1%19:26 sunset · 6:28 sunrise
No ideal imaging window · green sky, full darkness and moon below do not overlapNew moon · 1% illuminated
Sky / seeingCloud and stability
DarknessTwilight levels
MoonAbove or below
22:00 · 100% cloud · seeing 0.0/1001:00 · 100% cloud · seeing 0.0/1004:00 · 100% cloud · seeing 0.0/10
Civil twilightNautical twilightAstronomical twilightAstronomical darknessAstronomical twilightNautical twilightCivil twilight
Moon below horizon
19:2620:0021:0022:0023:0000:0001:0002:0003:0004:0005:0006:0006:28
GoodMixedPoorFull darknessMoon above