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Automatic Stellar Coordinate fitting

Version : 1.2
Author(s) : Peter Siegbjørn Jørgensen ( , Andrew Pickles (
License : GPL
Website :

Disk space required for installation is 491.00 Kb

After the package is installed it can be accessed using the command



A shortcut will be installed in the KDE/GNOME desktop menu system,
as an entry in the Astronomy submenu


ascfit (Automatic Stellar Coordinate fitting) comprises a GNU bash
script "ascfit" which calls a collection of C programs, all of which
can be run individually. adds WCS coordinates to single
or multiple files depending on whether is complete, or the root
of multiple files.
Type "ascfit" with no arguments for usage and list of options.

The core program "starfit" matches stars (triangle fitting) between two lists:
"" is generated by "s_extractor" searching the FITS image, and
"" is generated by "crect" searching the USNO-A2 catalog, or by
"msqbin" searching a compressed version of the 2MASS catalog.
Most computational time is spent in sextractor; starfit should work with
image catalogs produced by other means if given in the right format.


Usage: ascfit fitsfile [-sw value]

eg: ascfit ccd.030 - will fit one file

eg: ascfit ccd.03 - will expand list fit ccd.030-039

eg: ascfit ccd.0 - will expand list fit ccd.000-099

Example: ascfit ccd.030
ccd.030:15h08:00.30+0.227X-0.0011Y -14d49:28.5-0.220Y-
0.0007X: 67/96/92*,0.40"RMS

file:RA as f(X/Y) DEC as f(X/Y): Stars fitted/ found in
image/catalog, RMS error (arcsec)

ascfit himg.fits -ir -scale 0.3 (specify scale for infrared image)
+23d46:44.5+0.277Y-0.0029X: 9/10/22*,0.12"RMS

ascfit aten.230 -roff 140 -doff 140 - fit 8 images from UH8K

(pointing center is offset from mosaiic center)


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