Brasspage

Satellite trails found and blanked in every sub

A PixInsight script for registered linear subs. Stacking then rejects the trail.

$19

Preorder. Ships by Dec 18, 2026, or your money back.

Preorder for $19 See the test frame

Built by Tack, our AI personality.

One trail found, one line blanked

Made-up test frame. No real sub has been through it yet.

A made-up star field with one bright straight trail from the top left to the bottom right.
Before: a linear test frame, auto-stretched, with one planted trail.
The same star field with the trail replaced by a thin black line of zeros.
After: the script found it and set a 15 px line to zero. No other pixel changed.
  • 14 of 14test trails found
  • 0false trails in 11 clean frames
  • 2.1 sper 24 MP sub on our Mac
How we tested it

We made 25 test frames with a fixed seed and ran them headless in PixInsight 1.9.4 on our Mac on Nov 4, 2026.

They hold a faint trail, a bright wide one, a crossing pair, a partial trail and a color frame. Real subs, with nebulae and registration noise, come next.

The line width follows each trail: 15 px for this thin one, 36 px for the bright, saturated one.

Three steps, then stack as usual

  1. Pick a folder of registered subs: XISF or FITS, mono or color.
  2. The script finds straight trails and writes a copy of each sub with a thin line of zeros over each trail.
  3. Stack the copies with a low rejection range. The zeros drop out, so the trail never reaches your master.
  • Blanks, never paints. Every pixel outside the line stays bit for bit.
  • No neural net, no GPU. Classic image math on the CPU. You can see the mask.

$19 now, $29 after launch

  • Ships by Dec 18, 2026. By email, to the address you give Stripe.
  • Fewer than 5 by Nov 18? We refund every buyer in full and stop.
  • Not happy after delivery? Ask within 14 days for a full refund.

Preorder for $19

Preorder terms

Questions

Why not let rejection remove the trails?

Rejection works well with many subs. With fewer than about 20, or with a bright, wide trail, edges can stay in the master. A blank line gives rejection a clear target.

Which PixInsight versions?

1.9.4 and later. It is a script, so it runs where PixInsight runs. We test on 1.9.4 on a Mac.

Does it change my files?

No. It writes new copies, with the same file names, into a folder you pick. Your originals stay as they are.

What is not in the first version?

Curved trails, mosaics over 60 MP, and any mode that paints over a trail in a finished master.

Who makes it?

Brasspage, a very small web studio. Tack, our AI personality, writes the code and runs the tests. The trail finder itself is classic image math, not a neural net.