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Ali Sabih

11.156° N   42.712° E  ·  699 M
55 /100
PEAK
Worth setting up — 4 hours of workable sky from 21:00.
BEST WINDOW 21:00–01:00 · ASTRO DARK 21:00–05:00 · MOON 0%
Transparency
0.99
Seeing
0.77
Cloud
57%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
21
22
23
00
01
02
03
04
05
06
46
55
51
36
17
45
30
8
6
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
2%
6%
7%
7%
45%
16%
40%
85%
88%
7%
High cloud
90%
69%
76%
81%
97%
55%
54%
90%
81%
1%
Transparency
0.95
0.98
0.99
0.69
0.37
0.66
0.63
0.58
0.54
0.53
Seeing
0.75
0.74
0.77
0.20
0.22
0.44
0.15
0.24
0.33
0.31
Moon clear
down
down
down
down
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
21 Fair · 46/100
Starting from
100
Cloud
−50
Transparency
−1
Seeing
−3
Moonlight
−0
Darkness
−0
Score
46
CLOUD 90% LOW 0% MID 2% HIGH 90% SUN -35.2° MOON -33.4° / 0% WIND 5 TEMP 32°
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
When a clear gap is worth driving for

Ask how long the gap is relative to your setup time and your exposure length. A two-hour gap is a real session for a visual observer and close to worthless for someone doing four-minute subs on a target that needs three hours.

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 20:30 · OBSERVE 21:00–01:00 · 4H · MEAN 46

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

2123010305
SET UP 20:30 · OBSERVE 21:00–00:00 · 3H · MEAN 45

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

2123010305
SEEING DEGRADES AFTER 00:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:30 · OBSERVE 21:00–00:00 · 3H · MEAN 41

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

2123010305
SET UP 21:30 · OBSERVE 22:00–23:00 · 1H · MEAN 35

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

2123010305
HIGH CLOUD CLEARS 22:00
SET UP 20:30 · OBSERVE 21:00–01:00 · 4H · MEAN 42

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

2123010305
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The next week of nights

Tonight · 12 Aug
55
Good
MOON 0%
21:00–01:00
Tomorrow · 13 Aug
90
Excellent
MOON 2%
20:00–05:00
Friday · 14 Aug
91
Excellent
MOON 6%
20:00–05:00
Saturday · 15 Aug
98
Excellent
MOON 13%
21:00–22:00
Sunday · 16 Aug
99
Excellent
MOON 21%
21:00–22:00
Monday · 17 Aug
94
Excellent
MOON 30%
03:00–04:00
Tuesday · 18 Aug
90
Excellent
MOON 39%
21:00–22:00
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Nearby locations

About this forecast

Conditions for Ali Sabih, Djibouti 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 →