GoodSeeing
Home › Locations › Hotaka

Hotaka

36.340° N   137.882° E  ·  547 M
54 /100
PEAK
Marginal, but there is a 1 hour gap from 02:00.
BEST WINDOW 02:00–03:00 · ASTRO DARK 02:00–04:00 · MOON 0%
Transparency
0.38
Seeing
1.00
Cloud
27%
Moon
0%

Fair tonight

Hour by hour, local to Hotaka. 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
54
32
12
0
BEST WINDOW
Low cloud
24%
35%
37%
41%
Mid cloud
1%
0%
2%
2%
High cloud
4%
56%
88%
23%
Transparency
0.35
0.37
0.38
0.38
Seeing
1.00
1.00
1.00
1.00
Moon clear
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
02 Fair · 54/100
Starting from
100
Cloud
−28
Transparency
−19
Seeing
−0
Moonlight
−0
Darkness
−0
Score
54
CLOUD 27% LOW 24% MID 1% HIGH 4% SUN -30.7° MOON -30.5° / 0% WIND 1 TEMP 18°
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 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 53

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

0204
CLOUD RETURNS 03:00
SET UP 01:30 · OBSERVE 02:00–04:00 · 2H · MEAN 51

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

0204
CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 50

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

0204
CLOUD RETURNS 03:00
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 39

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

0204
CLOUD RETURNS 03:00
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 53

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

0204
CLOUD RETURNS 03:00
Advertisement
Reserved

The next week of nights

Tonight · 12 Aug
54
Fair
MOON 0%
02:00–03:00
Tomorrow · 13 Aug
41
Fair
MOON 1%
22:00–23:00
Friday · 14 Aug
39
Fair
MOON 5%
03:00–04:00
Saturday · 15 Aug
20
Poor
MOON 8%
Sunday · 16 Aug
40
Fair
MOON 19%
21:00–22:00
Monday · 17 Aug
31
Poor
MOON 28%
Tuesday · 18 Aug
42
Fair
MOON 37%
03:00–04:00
Advertisement
Reserved

Nearby locations

About this forecast

Conditions for Hotaka, Japan 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 →