Load from FITS Header
Paste your plate-solved FITS header below and click Parse. This will auto-fill all WCS fields. Supports CD matrix, CDELT+PC matrix, and CDELT+CROTA2 formats.
WCS Parameters (Manual Entry)
Or enter values manually from your plate solve solution
CD matrix values from FITS header (= CDELT × PC matrix)
Rotation Correction
Y-flip ON is standard for plate-solved FITS + JPEG export. Rotation should be near 0°.
Computed Info
Load an image to compute
Query Parameters
Query by Category
Show Object Types
Density per Type
Max annotations shown per category
Filter visibility of already-queried objects
Query Log
Font
Title
Master Label Style
Global defaults — override per-type below
Extra gap between name, type, and distance lines
Per-Type Style Overrides
Leave blank to use master defaults
Circles
Leader Lines
Scale Bar
Set the distance and physical length to match your target
Visibility
Label Layout
Drop image here
Astro Annotator
Drop an astrophotography image here or click Open Image
Supports JPEG, PNG & TIFF
All files stay local in your browser — nothing is uploaded