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Vandiyūr

9.909° N   78.161° E  ·  131 M
52 /100
PEAK
Marginal, but there is a 2 hours gap from 21:30.
BEST WINDOW 21:30–23:30 · ASTRO DARK 21:30–05:30 · MOON 0%
Transparency
0.69
Seeing
0.92
Cloud
66%
Moon
0%

Fair tonight

Hour by hour, local to Vandiyūr. 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
52
42
34
35
34
34
37
34
12
0
BEST WINDOW
Low cloud
2%
0%
0%
0%
1%
0%
2%
1%
0%
0%
Mid cloud
2%
2%
6%
6%
9%
6%
5%
3%
2%
3%
High cloud
64%
86%
99%
99%
98%
99%
92%
100%
98%
98%
Transparency
0.69
0.69
0.62
0.62
0.60
0.58
0.58
0.58
0.57
0.54
Seeing
0.78
0.70
0.71
0.84
0.86
0.85
0.84
0.80
0.92
0.98
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 · 52/100
Starting from
100
Cloud
−38
Transparency
−8
Seeing
−3
Moonlight
−0
Darkness
−0
Score
52
CLOUD 66% LOW 2% MID 2% HIGH 64% SUN -40.5° MOON -39.3° / 0% WIND 4 TEMP 30°
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 21:00 · OBSERVE 21:30–23:30 · 2H · MEAN 45

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

2123010305
SET UP 21:00 · OBSERVE 21:30–23:30 · 2H · MEAN 45

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

2123010305
MOONLIGHT IGNORED FOR THIS TARGET
SET UP 21:00 · OBSERVE 21:30–22:30 · 1H · MEAN 43

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

2123010305
CLOUD RETURNS 22:30
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

2123010305
CLOUD NEVER DROPS BELOW 66%
SET UP 21:00 · OBSERVE 21:30–23:30 · 2H · 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
52
Fair
MOON 0%
21:30–23:30
Tomorrow · 13 Aug
76
Excellent
MOON 2%
20:30–05:30
Friday · 14 Aug
45
Fair
MOON 6%
20:30–23:30
Saturday · 15 Aug
42
Fair
MOON 13%
23:30–00:30
Sunday · 16 Aug
63
Good
MOON 21%
23:30–00:30
Monday · 17 Aug
73
Good
MOON 30%
23:30–00:30
Tuesday · 18 Aug
50
Fair
MOON 39%
23:30–00:30
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Nearby locations

About this forecast

Conditions for Vandiyūr, 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 →