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Batubulan

-8.624° S   115.262° E  ·  36 M
48 /100
PEAK
Marginal, but there is a 4 hours gap from 02:00.
BEST WINDOW 02:00–06:00 · ASTRO DARK 02:00–06:00 · MOON 0%
Transparency
0.28
Seeing
1.00
Cloud
26%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
02
03
04
05
06
07
35
44
48
46
8
0
BEST WINDOW
Low cloud
51%
36%
29%
29%
23%
23%
Mid cloud
1%
2%
2%
5%
6%
9%
High cloud
0%
0%
0%
0%
0%
0%
Transparency
0.27
0.26
0.25
0.27
0.28
0.27
Seeing
1.00
0.99
0.89
0.84
0.82
0.83
Moon clear
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
02 Fair · 35/100
Starting from
100
Cloud
−51
Transparency
−14
Seeing
−0
Moonlight
−0
Darkness
−0
Score
35
CLOUD 52% LOW 51% MID 1% HIGH 0% SUN -65.8° MOON -67.3° / 0% WIND 2 TEMP 23°
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 01:30 · OBSERVE 02:00–06:00 · 4H · MEAN 44

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

020406
TWILIGHT BEGINS 06:00
SET UP 01:30 · OBSERVE 02:00–07:00 · 5H · MEAN 49

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

020406
TWILIGHT BEGINS 07:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–06:00 · 3H · MEAN 44

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

020406
TWILIGHT BEGINS 06:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 02:30 · OBSERVE 03:00–06:00 · 3H · MEAN 47

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

020406
TWILIGHT BEGINS 06:00
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The next week of nights

Tonight · 12 Aug
48
Fair
MOON 0%
02:00–06:00
Tomorrow · 13 Aug
48
Fair
MOON 1%
20:00–00:00
Friday · 14 Aug
53
Fair
MOON 5%
03:00–05:00
Saturday · 15 Aug
30
Poor
MOON 10%
Sunday · 16 Aug
56
Good
MOON 19%
20:00–21:00
Monday · 17 Aug
55
Good
MOON 28%
20:00–21:00
Tuesday · 18 Aug
35
Fair
MOON 37%
20:00–21:00
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Nearby locations

About this forecast

Conditions for Batubulan, Indonesia 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 →