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Sagamihara

Kanagawa, Japan
Today
Feb 21, 2026
Fair

Decent Observing Night

0% cloud cover with waxing gibbous conditions (14% moon). Bright objects only — Moon, planets, and open clusters.

Tonight's Forecast
0
/ 100
First Light Index
Fair
Our proprietary metric combining sky clarity, moon interference, and light pollution for optimal stargazing conditions.
0
/ 100
Shutter Score
Fair
Photography-specific metric factoring cloud quality and golden hour potential for landscape shooters.

Light Windows Today

Blue HourGolden HourGolden HourBlue Hour
4 AM12 PM11 PM
Sunrise
6:22 AM
Golden: 51min
Sunset
5:30 PM
Golden: 51min
True Darkness
6:55 PM
Stars visible

Add to Calendar

Get reminders for golden hour and dark sky windows

Morning Golden Hour
6:06 AM - 6:56 AM
Evening Golden Hour
4:55 PM - 5:46 PM
Dark Sky Window
6:55 PM onwards
📱 How to use:
  1. 1. Download the .ics file above
  2. 2. Open it with your calendar app (iPhone Calendar, Google Calendar, Outlook)
  3. 3. Events will be added automatically
  4. 4. You'll get 30-minute reminders before each window
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Moon Phase

14%
Phase
Waxing Gibbous
Illumination
14%
💡 Slight Moon Interference
Moon may affect darkest sky observations

Light Pollution

6
Class 1
DarkClass 5
SuburbanClass 9
City
Sagamihara Classification
Moderate for Astronomy
Bortle Class 6: Bright Suburban Sky

Bright suburban sky

Visible Tonight

No Milky Way visible, only brightest Messier objects visible

🌙 Moderate Light Pollution
Good for bright objects. Milky Way visible but washed out. UHC filters recommended for nebulae.
💡 Tip: Check "Nearby Dark Sky" section below to find better observing sites within driving distance

Weather Conditions

Cloud Cover
3%
Ideal scattered clouds for vibrant sunset colors
Morning
0%
Evening
0%
Overnight
17%
Precipitation
8%
Very unlikely
Wind
13
km/h avg
Gusts up to 34 km/h
🟡 Breezy - May affect tracking
Humidity
60%
Moderate
Visibility
24.1
km
Excellent clarity
Temperature
14°C
High
/
1°C
Low
Seeing
4
/ 5
Excellent - Atmospheric stability
Transparency
2
/ 5
Moderate - Air clarity
Conditions Summary
🌫️ Hazy conditions - Bright objects only, consider light pollution filters

Nearby Dark Sky Locations

Within 100km

Aizu-misato Machi

Bortle
6
3
Significant improvement
210.7km·~2h 38min

Kumano

Bortle
6
3
Significant improvement
340.1km·~4h 15min
💡 These locations have significantly darker skies (6 → 3). Expect 8x more visible stars.

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