Duque de Caxias
Rio de Janeiro, Brazil
Today
Feb 21, 2026
0
/ 100
First Light Index
Poor
Our proprietary metric combining sky clarity, moon interference, and light pollution for optimal stargazing conditions.
0
/ 100
Shutter Score
Poor
Photography-specific metric factoring cloud quality and golden hour potential for landscape shooters.
Light Windows Today
4 AM12 PM11 PM
Sunrise
5:45 AM
Golden: 44min
Sunset
6:27 PM
Golden: 44min
True Darkness
7:45 PM
Stars visible
Add to Calendar
Get reminders for golden hour and dark sky windows
Morning Golden Hour
5:31 AM - 6:15 AM
Evening Golden Hour
5:57 PM - 6:42 PM
Dark Sky Window
7:45 PM onwards
📱 How to use:
- 1. Download the .ics file above
- 2. Open it with your calendar app (iPhone Calendar, Google Calendar, Outlook)
- 3. Events will be added automatically
- 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
9
Class 1
DarkClass 5
SuburbanClass 9
City
DarkClass 5
SuburbanClass 9
City
Duque de Caxias Classification
Poor for Astronomy
Bortle Class 9: Inner City Sky
Inner city sky
Visible Tonight
Entire sky brightly lit, only Moon, planets, and brightest stars visible
💡 Urban Sky Recommendation
Focus on lunar and planetary observation. Consider driving to a darker location for deep sky work.
💡 Tip: Check "Nearby Dark Sky" section below to find better observing sites within driving distance
Weather Conditions
Cloud Cover
78%
Heavy clouds - limited visibility and light
Morning
79%
Evening
79%
Overnight
84%
Precipitation
36%
Possible
Wind
15
km/h avg
Gusts up to 39 km/h
🟡 Breezy - May affect tracking
Humidity
81%
High - May cause haze
Visibility
18.4
km
Excellent clarity
Temperature
28°C
High
/
21°C
Low
Seeing
2
/ 5
Fair - Atmospheric stability
Transparency
1
/ 5
Hazy - Air clarity
Conditions Summary
🌪️ Poor seeing - Stick to wide-field imaging or wait for better atmospheric stability
Nearby Dark Sky Locations
Within 100km
Água Rasa
Bortle
9
3
Dramatic improvement
323.6km·~4h 3min
Pompéu
Bortle
9
3
Dramatic improvement
428.9km·~5h 22min
💡 These locations have significantly darker skies (9 → 3). Expect 64x more visible stars.
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