Home/Calculators/India on Aletheia

Patna

Bihar, India
Today
Feb 21, 2026
Poor

Marginal — Try Binoculars

0% cloud cover makes this a coin flip. If gaps appear, binoculars on the Moon or bright planets are your best bet.

Tonight's Forecast
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
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
6:19 AM
Golden: 45min
Sunset
5:46 PM
Golden: 45min
True Darkness
7:03 PM
Stars visible

Add to Calendar

Get reminders for golden hour and dark sky windows

Morning Golden Hour
6:05 AM - 6:51 AM
Evening Golden Hour
5:15 PM - 6:00 PM
Dark Sky Window
7:03 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
30-min reminders
All calendar apps
Timezone aware
No sign-up needed

Moon Phase

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

Light Pollution

8
Class 1
DarkClass 5
SuburbanClass 9
City
Patna Classification
Poor for Astronomy
Bortle Class 8: City Sky

City sky

Visible Tonight

Sky glows whitish gray, only brightest stars visible, M44 invisible

💡 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
39%
Moderate cloud cover - potential for dramatic skies
Morning
78%
Evening
0%
Overnight
96%
Precipitation
0%
Very unlikely
Wind
12
km/h avg
Gusts up to 32 km/h
🟡 Breezy - May affect tracking
Humidity
66%
Moderate
Visibility
24.1
km
Excellent clarity
Temperature
29°C
High
/
20°C
Low
Seeing
4
/ 5
Excellent - Atmospheric stability
Transparency
3
/ 5
Clear - Air clarity
Conditions Summary
👍 Good conditions for most observations

Nearby Dark Sky Locations

Within 100km

Reoti

Bortle
8
3
Dramatic improvement
81.2km·~1h 1min

Sāhibganj

Bortle
8
3
Dramatic improvement
81.8km·~1h 1min

Mehsi

Bortle
8
3
Dramatic improvement
84.5km·~1h 3min
💡 These locations have significantly darker skies (8 → 3). Expect 32x more visible stars.

Need to calculate camera settings?

Use our free calculators for shutter speed, hyperfocal distance, and field of view

Open Calculators