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Sironj

24.103° N   77.691° E  ·  472 M
57 /100
PEAK
Worth setting up — 4 hours of workable sky from 22:30.
BEST WINDOW 22:30–02:30 · ASTRO DARK 22:30–05:30 · MOON 0%
Transparency
0.19
Seeing
1.00
Cloud
21%
Moon
0%

Good tonight

Hour by hour, local to Sironj. 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
38
57
54
37
18
11
17
0
BEST WINDOW
Low cloud
20%
6%
13%
34%
63%
73%
73%
100%
Mid cloud
14%
2%
2%
11%
20%
20%
3%
4%
High cloud
35%
16%
8%
15%
14%
38%
1%
20%
Transparency
0.19
0.18
0.17
0.17
0.10
0.10
0.19
0.18
Seeing
1.00
1.00
0.96
0.97
0.98
1.00
0.99
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 Fair · 38/100
Starting from
100
Cloud
−43
Transparency
−18
Seeing
−0
Moonlight
−0
Darkness
−0
Score
38
CLOUD 54% LOW 20% MID 14% HIGH 35% SUN -42.0° MOON -40.5° / 0% WIND 2 TEMP 25°
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 22:00 · OBSERVE 22:30–02:30 · 4H · MEAN 46

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

22000204
CLOUD RETURNS 02:30
SET UP 22:00 · OBSERVE 22:30–02:30 · 4H · MEAN 58

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

22000204
CLOUD RETURNS 02:30MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:00 · OBSERVE 23:30–01:30 · 2H · MEAN 50

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

22000204
HIGH CLOUD CLEARS 23:30CLOUD RETURNS 01:30
SET UP 23:00 · OBSERVE 23:30–01:30 · 2H · MEAN 39

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

22000204
HIGH CLOUD CLEARS 23:30CLOUD RETURNS 01:30
SET UP 22:00 · OBSERVE 22:30–02:30 · 4H · MEAN 46

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

22000204
CLOUD RETURNS 02:30
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The next week of nights

Tonight · 12 Aug
57
Good
MOON 0%
22:30–02:30
Tomorrow · 13 Aug
30
Poor
MOON 2%
Friday · 14 Aug
22
Poor
MOON 6%
Saturday · 15 Aug
12
Clouded out
MOON 13%
Sunday · 16 Aug
0
Clouded out
MOON 21%
Monday · 17 Aug
0
Clouded out
MOON 30%
Tuesday · 18 Aug
17
Poor
MOON 39%
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About this forecast

Conditions for Sironj, 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 →