Telescope Data Sort
Organize any scope's FITS/TIFF
Only for Mac
Free
Mac
Free and open source. Sort TIFF, FITS and JPG from smart telescopes or any other telescope or camera into year and object folders. Not affiliated with telescope makers.
Telescope Data Sort helps you turn messy telescope download folders into a clean library. It works with smart telescopes and with data from any other telescope or camera, including classic setups, when the files are organized as described below.
Copy your sessions from the telescope to a Captures folder on your Mac (USB, FTP, or Wi-Fi). Choose that folder and the app recognizes the folder layout for you. Pick the file types to sort, review every move, and Sort. Files land in Targets {year}/{object} so multi-night captures of the same object stay together.
Smart-telescope folder layouts (detected automatically)
• Dated sessions from Vespera and Stellina telescopes
• Object albums from S30, S30 Pro, and S50 telescopes
• Session folders from DWARF 3, II, and mini telescopes
• Object-and-date folders from Origin Mark II telescopes
Using data from other telescopes
Images from any other telescope or camera, including a classic telescope with an astronomy camera or DSLR, sort the same way when:
• The files are TIFF or FITS (JPG optional). They are copied unchanged; nothing is converted.
• They sit in a folder named for the object, such as M31 or NGC 7000. Folders with no object name are listed so you can name them.
• The year comes from a dated folder name such as 2026-10-07, or else from the file date.
• Frames left inside Light, Dark, Flat, Bias, or Master folders are set aside, not sorted.
Example: Captures/2026-10-07/M31/frame_0001.fits goes to Targets 2026/M31.
Telescope names identify folder layouts only. Telescope Data Sort is an independent app. It is not affiliated with, endorsed by, or created by those manufacturers.
What the app does
• Detects smart-telescope folder layouts in your Captures folder
• Sorts TIFF, FITS, and JPG — choose any combination
• Previews every file and where it goes before anything changes
• Copies files into Targets {year}/{object}, checks each copy byte for byte, and asks twice before deleting the originals
• Never overwrites a file in your library; only byte-identical copies count as duplicates
• Moves plate solves next to their object's images
• Finds identical copies already in your library and keeps one of each
• Optional named backup first, as a zip or tarball, with a progress bar and Cancel
• Asks Yes or No before deleting finished session folders, and offers to sort file types you skipped
• Never deletes a folder that still holds files it doesn't recognize
• Sends removed files and folders to the Trash where the drive supports it
• Runs natively on Apple silicon and Intel Macs with macOS 15 or newer
What the app does not do
• It does not connect to or control your telescope
• It does not stack or process images
• It does not convert files, and it does not sort camera RAW or video files
• It does not use Apple Photos as a library source
Free and open source
Telescope Data Sort is free, and its source code is on GitHub. If you change it and share it, please credit BigSkyAstro with our logo and a link to bigskyastro.com.
Built by BigSkyAstro.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Smart Telescope Sort is now Telescope Data Sort. Your settings, folders and terms acceptance carry over.
- A new icon with an Open Source banner.
- Works with data from any telescope or camera, including classic setups, when the files are in folders named for the object. Smart-telescope layouts are still detected automatically.
- A new "Using data from other telescopes" section in the user manual, with the folder rules and an example.
- When no smart-telescope layout is found, the window says "Folders from any telescope or camera".
- A new Credits window, in the Telescope Data Sort menu, the Help menu and the sidebar. It lists the people behind the app and its data sources.
- A session folder at the top of your Capture Folder now shows its own name instead of "Captures".
- Rows with no files left to sort no longer appear after sorting.
- A notice at the top of the window and the manual: "This has not been tested with other telescopes, but there is no reason it will not work with almost any data that it supports!"
- Open-source freeware (MIT): the copyright line is gone from the app and the manual.
The developer, Richard Derry, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Richard Derry
- Size
- 3 MB
- Category
- Utilities
- Compatibility
Requires macOS 15.0 or later.
- Mac
Requires macOS 15.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Open-source freeware
