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00:00 site local. Astronomical dark, moon down. Sun -79°. Moon 1% waning crescent. Median SQM 21.9. No long moonless night in the published window

Book a Night

90 mm hydrogen-alpha solar telescope

Solano

Aperture
90 mm
Focal ratio
f/8.0
First light
2019
Limiting mag

Double-stacking gets the bandwidth down to about half an angstrom, which is the difference between a flat orange disc and a surface with structure on it. Prominences change visibly over a two-hour session; on a good day you can watch one detach.

This exists because the middle of the day at 2,480 m is otherwise dead time. Guests arrive in the afternoon, cannot observe for six hours, and are usually too wired to sleep. Solano fills that gap with something real.

What it is not for

Night. It is a solar telescope.