# Sun in hydrogen alpha: Mercury transit 2

Sun in hydrogen alpha: Mercury transit 2. Photograph of the sun by Giancarlo Erra. Prints and merchandise available.

- **Category:** Solar
- **Equipment:** Skywatcher HEQ5 – Skywatcher Esprit 100 F/5.5 Triplet Super APO (550mm) – Daystar Quark Chromosphere HA – ASI174MM-COOL
- **Published:** 2026-08-21

![Sun in hydrogen alpha: Mercury transit 2](https://astro.observer/images/sun-in-hydrogen-alpha-mercury-transit-2/sun-in-hydrogen-alpha-mercury-transit-2-2400.jpg?v=20f8305f88)

Prints and merchandise: https://www.redbubble.com/i/photographic-print/Mercury-Sun-transit-2-by-giancarloerra/21842088/zltf

Copyright Giancarlo Erra, all rights reserved. Licence: https://astro.observer/licence/

Previous: https://astro.observer/image/sun-in-hydrogen-alpha-mercury-transit-1/
Next: https://astro.observer/image/sun-in-hydrogen-alpha-mercury-transit-3/
Gallery: https://astro.observer/