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This app is only available on the App Store for iOS devices.


The Triatlas app contains the most detailed, speedy star chart available for smartphones and tablets!

- Stars up to mag 12.6
- Galaxies up to mag 15.5 (PGC). 37000 in total!
- 1200 planetary nebulae
- 1800 open clusters, all globulars
- Others: SH-2, RCW,LDN / Barnard
- Double stars whose main star is brighter than 11th magnitude (35,000 double stars)
- Variable stars whose maximum reaches the 12.5 magnitude (29,000 variable stars)

- Flexible Night vision mode
- Landscape-portrait mode
- Flip and mirror (Supporting telescope orientation)
- Chart-to-chart navigation using the black corners.

Based on the charts made by Jose Torres. Used with permission.

What's New in Version 1.2.1

iOS 8 ready
UI optimizations


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPad Screenshot 1
iPad Screenshot 2

Customer Reviews

Excellent App!

The Triatlas is one of my favorite sky atlases. I like having the app so I only need to print the 50 or so pages of the "A" set, and I can access the other two sets when I am outside with my telescope. I really enjoy being able to turn the brightness way down and turn on red on black to preserve night vision. After using it, I tend to wait a while before starting a new sketch for my eyes to get rid of the faint light.

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This app is designed for both iPhone and iPad
  • Free
  • Category: Education
  • Updated:
  • Version: 1.2.1
  • Size: 486 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.1 or later. Compatible with iPhone, iPad, and iPod touch.

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