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Chanika

-5.417° S   38.017° E  ·  673 M
72 /100
PEAK
Worth setting up — 8 hours of workable sky from 20:00.
BEST WINDOW 20:00–04:00 · ASTRO DARK 20:00–06:00 · MOON 0%
Transparency
0.65
Seeing
1.00
Cloud
3%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
20
21
22
23
00
01
02
03
04
05
06
07
37
63
72
69
65
65
65
65
1
0
0
0
BEST WINDOW
Low cloud
5%
0%
0%
0%
0%
0%
0%
0%
88%
100%
100%
100%
Mid cloud
3%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
93%
32%
3%
6%
13%
12%
9%
5%
2%
6%
0%
0%
Transparency
0.65
0.46
0.35
0.29
0.26
0.24
0.21
0.18
0.15
0.16
0.16
0.16
Seeing
0.83
0.90
0.95
0.98
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
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
20 Fair · 37/100
Starting from
100
Cloud
−55
Transparency
−6
Seeing
−2
Moonlight
−0
Darkness
−0
Score
37
CLOUD 94% LOW 5% MID 3% HIGH 93% SUN -22.3° MOON -21.1° / 0% WIND 4 TEMP 21°
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 19:30 · OBSERVE 20:00–04:00 · 8H · MEAN 62

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

202200020406
CLOUD RETURNS 04:00
SET UP 19:30 · OBSERVE 20:00–04:00 · 8H · MEAN 75

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

202200020406
CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:30 · OBSERVE 21:00–04:00 · 7H · MEAN 60

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

202200020406
HIGH CLOUD CLEARS 21:00CLOUD RETURNS 04:00
SET UP 20:30 · OBSERVE 21:00–04:00 · 7H · MEAN 51

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

202200020406
HIGH CLOUD CLEARS 21:00CLOUD RETURNS 04:00
SET UP 20:30 · OBSERVE 21:00–04:00 · 7H · MEAN 70

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

202200020406
HIGH CLOUD CLEARS 21:00CLOUD RETURNS 04:00
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The next week of nights

Tonight · 12 Aug
72
Good
MOON 0%
20:00–04:00
Tomorrow · 13 Aug
82
Excellent
MOON 2%
20:00–06:00
Friday · 14 Aug
72
Good
MOON 6%
20:00–04:00
Saturday · 15 Aug
47
Fair
MOON 13%
21:00–22:00
Sunday · 16 Aug
40
Fair
MOON 21%
21:00–22:00
Monday · 17 Aug
45
Fair
MOON 30%
21:00–22:00
Tuesday · 18 Aug
54
Fair
MOON 39%
21:00–22:00
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Nearby locations

About this forecast

Conditions for Chanika, Tanzania 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 →