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Fenghuang

27.936° N   109.600° E  ·  449 M
62 /100
PEAK
Worth setting up — 3 hours of workable sky from 02:00.
BEST WINDOW 02:00–05:00 · ASTRO DARK 01:00–05:00 · MOON 0%
Transparency
0.17
Seeing
1.00
Cloud
6%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
01
02
03
04
05
06
24
62
48
42
19
0
BEST WINDOW
Low cloud
3%
4%
19%
23%
25%
75%
Mid cloud
64%
3%
10%
20%
56%
8%
High cloud
18%
0%
5%
2%
4%
1%
Transparency
0.16
0.17
0.17
0.17
0.17
0.18
Seeing
1.00
1.00
1.00
0.98
1.00
1.00
Moon clear
down
down
down
down
down
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
01 Poor · 24/100
Starting from
100
Cloud
−64
Transparency
−12
Seeing
−0
Moonlight
−0
Darkness
−0
Score
24
CLOUD 67% LOW 3% MID 64% HIGH 18% SUN -47.0° MOON -46.1° / 0% WIND 1 TEMP 23°
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.

SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 51

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

010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 05:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 64

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

010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 46

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

010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 05:00
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 47

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

010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 03:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 52

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

010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
62
Good
MOON 0%
02:00–05:00
Tomorrow · 13 Aug
67
Good
MOON 1%
21:00–05:00
Friday · 14 Aug
64
Good
MOON 5%
21:00–02:00
Saturday · 15 Aug
74
Good
MOON 10%
02:00–03:00
Sunday · 16 Aug
75
Excellent
MOON 19%
02:00–03:00
Monday · 17 Aug
28
Poor
MOON 28%
Tuesday · 18 Aug
30
Poor
MOON 37%
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About this forecast

Conditions for Fenghuang, 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 →