Code Obsession

Mac software for astrophotographers who care about their data.

You spend the night getting the photons. We build the tools that take care of what comes next: knowing what you have, finding it again, and getting it ready for processing. All three apps are native Mac software, they work on the files you already have, and none of them changes them behind your back.

Explore FITSit Explore SolFITS Explore Observatory

Three apps, one goal

Fewer hours on housekeeping, more under the stars

FITSit

Look after your FITS files.

FITSit is the quick tool for the folder in front of you. Blink a night’s frames to spot the clouds and the satellite trails, measure every frame’s stars and tick the ones that fall short, rename files from their own headers, and fix a wrong OBJECT or FILTER across a whole session in one edit.

Blink a folder like a slide show
Measure star count, HFD, FWHM and eccentricity for every frame
Rename files from a template of their own keywords
Read and edit FITS headers, in one file or many

USD 9.99 · 14-day free trial Explore FITSit

SolFITS

Plate solve a night in one go.

SolFITS plate solves a whole folder of FITS images on your Mac, even those with no position in their headers. Save the solutions in the FITS header, a .wcs file or an extended attribute, and let SolFITS name the targets of your images from what they really show.

Solve whole folders, and optionally their subfolders, offline
Finds its own starting points where the header has none
Save the solution where you want it, and delete it again
Suggests the OBJECT name from what the image shows

USD 9.99 · 14-day free trial Explore SolFITS

Observatory

Your astrophotography library.

Drop your imaging folder on Observatory and it builds a library that organizes everything by session, target and equipment, without copying or modifying a single file. See how much integration time you have on every target and filter, find any frame in seconds, and plate solve to tag and label everything in the picture. It also downloads research images from professional observatories, and adds Quick Look, Finder thumbnails and Spotlight search for FITS, XISF and SBIG files to your Mac.

Sessions, targets, equipment and tags, organized automatically
Integration reports for every target and filter
Plate solving with object overlays, down to comets and asteroids
Albums, smart albums, ratings, notes and bulk metadata editing
10+ professional archives at your fingertips

USD 59.99 · free demo available Explore Observatory

Better together

Imaging nights follow the same path

Each app has its place on it.

Tidy the folder

FITSit

Cull the bad frames, fix the headers, give the files sensible names.

Find the position

SolFITS

Plate solve the folder and save where each image is in the sky.

In your library

Observatory

Organize, search and plate solve everything you’ve ever shot.

	Tidy the folder	Find the position	In your library
The job	Clean up a fresh folder: cull the bad frames, fix the headers, give the files sensible names	Plate solve the folder, save the solutions with the files and name the targets	Organize, search and plate solve everything you’ve ever shot
The app	FITSit	SolFITS	Observatory
Best for	A folder, right now	A folder, right now	Your whole imaging history

Tidy the night with FITSit, solve it with SolFITS, then let Observatory catalog it. Your frames arrive with the right names, headers and positions, and the bad ones never clutter your library.

Use any of them alone, too. None needs the others, and all three are regular one-time purchases. Observatory has a free demo, and FITSit and SolFITS each come with a 14-day free trial, so you can try any of them before you buy.

Our promise

What you can count on

Your originals stay yours

Observatory never copies, moves or alters your master images. FITSit and SolFITS write to a file only when you ask them to, and move nothing to the Trash without your say-so.

Made for the Mac

Native apps for Apple silicon and Intel, built on the macOS features you already use: Quick Look, Spotlight, the Finder, Metal and Time Machine.

Made for real astrophotography

FITS files from any camera, one-shot-color or monochrome (and XISF, SBIG and RAW in Observatory), from a night’s hundred frames to a decade’s tens of thousands.

No AI

No invented pixels and no “enhancing.” What you see is your data.

The details

And the small things that add up

Finder integration

Observatory’s Quick Look and Spotlight plugins give your FITS, XISF and SBIG files thumbnails, previews with their headers, and search in every Mac, whether or not you use a library.

Acorn plugin

Open your FITS, XISF and SBIG images at full bit depth in the Acorn image editor.

Documentation

All three apps include a Help book that covers every window and shortcut.

Get started

Pick the app for the job

Explore FITSit Explore SolFITS Get Observatory

Questions or feedback? We’d love to hear from you: support@codeobsession.com