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Chenghua

23.461° N 116.770° E · 13 M

60 /100
PEAK

Worth setting up — 2 hours of workable sky from 03:00.

BEST WINDOW 03:00–05:00 · ASTRO DARK 00:00–05:00 · MOON 0%

Transparency

0.27

Seeing

0.91

Cloud

16%

Moon

Good tonight

Hour by hour, local to Chenghua. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state

Lighter = daylight and twilight · unshaded = astronomical dark

Score

BEST WINDOW

Low cloud

15%

Mid cloud

High cloud

59%

87%

73%

34%

14%

17%

59%

Transparency

0.27

0.26

0.25

0.24

0.22

0.21

Seeing

0.61

0.67

0.63

0.74

0.82

0.91

0.94

Moon clear

down

Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Why this hour scored what it did

00 Fair · 39/100

Starting from

100

Cloud

−38

Transparency

−18

Seeing

−4

Moonlight

−0

Darkness

−0

Score

CLOUD 63% LOW 8% MID 1% HIGH 59% SUN -51.3° MOON -50.1° / 0% WIND 6 TEMP 29°

Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

Deep-sky visualPlanetary & lunarWide-field imagingLong exposureMeteor watching

SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 57

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

00020406

HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00

SET UP 01:30 · OBSERVE 02:00–06:00 · 4H · MEAN 56

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

00020406

CLOUD RETURNS 06:00MOONLIGHT IGNORED FOR THIS TARGET

SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 51

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

00020406

HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00

SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 40

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

00020406

HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00

SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 60

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

00020406

HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00

The next week of nights

Tonight · 12 Aug

Good

MOON 0%
03:00–05:00

Tomorrow · 13 Aug

Fair

MOON 1%
22:00–03:00

Friday · 14 Aug

Poor

MOON 5%

Saturday · 15 Aug

Fair

MOON 10%
02:00–03:00

Sunday · 16 Aug

Poor

MOON 19%

Monday · 17 Aug

Poor

MOON 28%

Tuesday · 18 Aug

Poor

MOON 37%

Nearby locations

About this forecast

Conditions for Chenghua, China are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →