GoodSeeing
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Gedeb

9.572° N   43.181° E  ·  1644 M
59 /100
PEAK
Worth setting up — 2 hours of workable sky from 03:00.
BEST WINDOW 03:00–05:00 · ASTRO DARK 21:00–05:00 · MOON 0%
Transparency
0.69
Seeing
0.73
Cloud
6%
Moon
0%

Good tonight

Hour by hour, local to Gedeb. 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
19
35
20
53
58
2
56
59
47
0
BEST WINDOW
Low cloud
2%
2%
1%
0%
0%
85%
0%
0%
2%
6%
Mid cloud
47%
9%
50%
16%
22%
85%
6%
17%
11%
5%
High cloud
81%
65%
70%
21%
12%
19%
0%
0%
0%
0%
Transparency
0.10
0.13
0.14
0.46
0.69
0.32
0.16
0.53
0.65
0.65
Seeing
0.68
0.68
0.73
0.58
0.52
0.54
0.52
0.46
0.43
0.44
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 Poor · 19/100
Starting from
100
Cloud
−69
Transparency
−11
Seeing
−2
Moonlight
−0
Darkness
−0
Score
19
CLOUD 90% LOW 2% MID 47% HIGH 81% SUN -36.3° MOON -34.5° / 0% WIND 5 TEMP 19°
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
What the GoodSeeing score actually measures

One number from 0 to 100 per hour, combining cloud, transparency, seeing, moonlight and darkness. Cloud gates everything else — no amount of steady, dark air rescues an overcast sky.

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 03:00–06:00 · 3H · MEAN 56

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

2123010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 06:00
SET UP 02:30 · OBSERVE 03:00–06:00 · 3H · MEAN 58

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

2123010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 06:00SEEING STAYS SOFT THROUGHOUT
SET UP 02:30 · OBSERVE 03:00–06:00 · 3H · MEAN 57

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

2123010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 06:00
SET UP 02:30 · OBSERVE 03:00–06:00 · 3H · MEAN 46

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

2123010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 06:00
SET UP 02:30 · OBSERVE 03:00–06:00 · 3H · MEAN 62

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

2123010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 06:00
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The next week of nights

Tonight · 12 Aug
59
Good
MOON 0%
03:00–05:00
Tomorrow · 13 Aug
72
Good
MOON 2%
23:00–05:00
Friday · 14 Aug
82
Excellent
MOON 6%
20:00–05:00
Saturday · 15 Aug
53
Fair
MOON 13%
21:00–22:00
Sunday · 16 Aug
73
Good
MOON 21%
03:00–04:00
Monday · 17 Aug
57
Good
MOON 30%
21:00–22:00
Tuesday · 18 Aug
67
Good
MOON 39%
03:00–04:00
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Nearby locations

About this forecast

Conditions for Gedeb, Ethiopia 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 →