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Rānīganj

23.616° N   87.131° E  ·  103 M
47 /100
PEAK
Marginal, but there is a 3 hours gap from 01:30.
BEST WINDOW 01:30–04:30 · ASTRO DARK 22:30–04:30 · MOON 0%
Transparency
0.21
Seeing
1.00
Cloud
51%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
22
23
00
01
02
03
04
05
13
29
24
40
47
41
13
0
BEST WINDOW
Low cloud
6%
4%
8%
1%
1%
8%
16%
23%
Mid cloud
59%
4%
27%
3%
2%
9%
23%
8%
High cloud
97%
92%
88%
70%
49%
51%
53%
72%
Transparency
0.10
0.10
0.19
0.19
0.19
0.21
0.21
0.22
Seeing
1.00
1.00
0.95
1.00
0.95
0.96
1.00
1.00
Moon clear
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
22 Clouded out · 13/100
Starting from
100
Cloud
−79
Transparency
−8
Seeing
−0
Moonlight
−0
Darkness
−0
Score
13
CLOUD 98% LOW 6% MID 59% HIGH 97% SUN -47.1° MOON -45.7° / 0% WIND 2 TEMP 26°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

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 01:00 · OBSERVE 01:30–04:30 · 3H · MEAN 41

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

22000204
HIGH CLOUD CLEARS 01:30TWILIGHT BEGINS 04:30
SET UP 01:00 · OBSERVE 01:30–04:30 · 3H · MEAN 52

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

22000204
HIGH CLOUD CLEARS 01:30TWILIGHT BEGINS 04:30MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:00 · OBSERVE 02:30–03:30 · 1H · MEAN 38

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

22000204
HIGH CLOUD CLEARS 02:30
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

22000204
CLOUD NEVER DROPS BELOW 51%
SET UP 01:00 · OBSERVE 01:30–04:30 · 3H · MEAN 40

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

22000204
HIGH CLOUD CLEARS 01:30TWILIGHT BEGINS 04:30
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The next week of nights

Tonight · 12 Aug
47
Fair
MOON 0%
01:30–04:30
Tomorrow · 13 Aug
14
Clouded out
MOON 2%
Friday · 14 Aug
31
Poor
MOON 6%
Saturday · 15 Aug
26
Poor
MOON 13%
Sunday · 16 Aug
29
Poor
MOON 21%
Monday · 17 Aug
32
Poor
MOON 30%
Tuesday · 18 Aug
26
Poor
MOON 39%
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Nearby locations

About this forecast

Conditions for Rānīganj, India 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 →