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Lương Bằng

20.740° N   106.060° E  ·  7 M
74 /100
PEAK
Worth setting up — 6 hours of workable sky from 23:00.
BEST WINDOW 23:00–05:00 · ASTRO DARK 23:00–05:00 · MOON 0%
Transparency
0.39
Seeing
1.00
Cloud
0%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
23
00
01
02
03
04
05
06
71
74
73
52
46
49
9
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
1%
0%
4%
0%
0%
1%
High cloud
7%
0%
0%
56%
68%
64%
75%
88%
Transparency
0.38
0.36
0.36
0.39
0.39
0.38
0.37
0.37
Seeing
0.94
0.98
0.98
0.98
1.00
1.00
1.00
1.00
Moon clear
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
23 Good · 71/100
Starting from
100
Cloud
−4
Transparency
−24
Seeing
−1
Moonlight
−0
Darkness
−0
Score
71
CLOUD 7% LOW 0% MID 0% HIGH 7% SUN -51.3° MOON -49.9° / 0% WIND 3 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 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 60

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

23010305
TWILIGHT BEGINS 05:00
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 71

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

23010305
TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 62

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

23010305
SET UP 22:30 · OBSERVE 23:00–02:00 · 3H · MEAN 60

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

23010305
CLOUD RETURNS 02:00
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 61

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

23010305
TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
74
Good
MOON 0%
23:00–05:00
Tomorrow · 13 Aug
53
Fair
MOON 1%
20:00–00:00
Friday · 14 Aug
50
Fair
MOON 5%
23:00–03:00
Saturday · 15 Aug
36
Fair
MOON 10%
01:00–02:00
Sunday · 16 Aug
32
Poor
MOON 19%
Monday · 17 Aug
36
Fair
MOON 28%
01:00–02:00
Tuesday · 18 Aug
0
Clouded out
MOON 37%
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Nearby locations

About this forecast

Conditions for Lương Bằng, Vietnam 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 →