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Tarch’a Sodo

7.151° N   37.172° E  ·  1362 M
49 /100
PEAK
Marginal, but there is a 2 hours gap from 23:00.
BEST WINDOW 23:00–01:00 · ASTRO DARK 21:00–06:00 · MOON 0%
Transparency
0.31
Seeing
1.00
Cloud
47%
Moon
0%

Fair tonight

Hour by hour, local to Tarch’a Sodo. 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
07
34
5
49
44
22
8
9
8
10
1
0
BEST WINDOW
Low cloud
1%
2%
2%
9%
28%
59%
59%
60%
59%
49%
37%
Mid cloud
23%
100%
9%
1%
7%
10%
15%
14%
12%
10%
24%
High cloud
73%
48%
40%
44%
65%
43%
38%
15%
10%
6%
23%
Transparency
0.31
0.31
0.29
0.25
0.21
0.18
0.18
0.10
0.18
0.10
0.10
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
Moon clear
down
down
down
down
down
down
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
21 Poor · 34/100
Starting from
100
Cloud
−53
Transparency
−13
Seeing
−0
Moonlight
−0
Darkness
−0
Score
34
CLOUD 80% LOW 1% MID 23% HIGH 73% SUN -31.9° MOON -30.1° / 0% WIND 1 TEMP 20°
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 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 45

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

212301030507
CLOUD BREAKS 23:00CLOUD RETURNS 01:00
SET UP 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 56

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

212301030507
CLOUD BREAKS 23:00CLOUD RETURNS 01:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 39

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

212301030507
CLOUD BREAKS 23:00CLOUD RETURNS 01:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

212301030507
CLOUD NEVER DROPS BELOW 47%
SET UP 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 44

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

212301030507
CLOUD BREAKS 23:00CLOUD RETURNS 01:00
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The next week of nights

Tonight · 12 Aug
49
Fair
MOON 0%
23:00–01:00
Tomorrow · 13 Aug
42
Fair
MOON 2%
20:00–22:00
Friday · 14 Aug
31
Poor
MOON 6%
Saturday · 15 Aug
34
Poor
MOON 13%
Sunday · 16 Aug
59
Good
MOON 21%
03:00–04:00
Monday · 17 Aug
52
Fair
MOON 30%
03:00–04:00
Tuesday · 18 Aug
51
Fair
MOON 39%
21:00–22:00
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Nearby locations

About this forecast

Conditions for Tarch’a Sodo, 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 →