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Maebaru-chūō

33.559° N   130.202° E  ·  12 M
64 /100
PEAK
Worth setting up — 2 hours of workable sky from 03:00.
BEST WINDOW 03:00–05:00 · ASTRO DARK 02:00–05:00 · MOON 0%
Transparency
0.36
Seeing
0.99
Cloud
14%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
02
03
04
05
06
31
64
56
11
0
BEST WINDOW
Low cloud
0%
3%
11%
15%
27%
Mid cloud
64%
11%
15%
14%
14%
High cloud
0%
0%
0%
0%
0%
Transparency
0.36
0.33
0.31
0.30
0.30
Seeing
0.94
0.99
0.99
0.99
1.00
Moon clear
down
down
down
down
0%
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
02 Poor · 31/100
Starting from
100
Cloud
−58
Transparency
−11
Seeing
−0
Moonlight
−0
Darkness
−0
Score
31
CLOUD 64% LOW 0% MID 64% HIGH 0% SUN -36.4° MOON -36.1° / 0% WIND 3 TEMP 25°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.
Tonight's limiting factor
Conditions for planets and the Moon

Seeing is everything. Darkness and moonlight barely matter, and a hazy, humid night that ruins deep-sky work is often the steadiest night of the year for planetary detail.

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

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

020406
CLOUD BREAKS 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.

020406
TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 56

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

020406
CLOUD BREAKS 03:00TWILIGHT BEGINS 05:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 46

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

020406
CLOUD BREAKS 03:00TWILIGHT BEGINS 05:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 62

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

020406
CLOUD BREAKS 03:00TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
64
Good
MOON 0%
03:00–05:00
Tomorrow · 13 Aug
68
Good
MOON 1%
21:00–03:00
Friday · 14 Aug
54
Fair
MOON 5%
23:00–03:00
Saturday · 15 Aug
32
Poor
MOON 8%
Sunday · 16 Aug
29
Poor
MOON 19%
Monday · 17 Aug
12
Clouded out
MOON 28%
Tuesday · 18 Aug
34
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Maebaru-chūō, Japan 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 →