Welcome to pyastrometry’s documentation!¶

Using pyastrometry_cli_main.py¶

Introduction¶

The script “pyastrometry_cli_main.py” handles taking an image and plate solveing it to find the current position of the mount.

Invocation¶

The invocation of autofocus_auto_star.py is:

usage: pyastrometry_cli <operation> [<args>]

The accepted commands are:
   solvepos     Take an image and solve current position
   solveimage <filename>    Solve position of an image file
   sync         Take an image, solve and sync mount
   slewsolve  <ra> <dec>  Slew to position and plate solve and slew until within threshold

Astromentry CLI

positional arguments:
  operation   Operation to perform

optional arguments:
  -h, --help  show this help message and exit

Command Details¶

solvepos:

Takes an image with the camera and solves it. Drivers can be specified via a astroprofile or command line arguments.

usage: pyastrometry_cli solvepos [<args>]

Solve Parameters

optional arguments:
  -h, --help            show this help message and exit
  --profile PROFILE     Name of astroprofile
  --mount               Name of mount driver
  --camera              Name of camera driver
  --exposure            Exposure time
  --binning             Camera binning
  --solver SOLVER       Solver to use
  --pixelscale PIXELSCALE
                        Pixel scale (arcsec/pixel)
  --downsample DOWNSAMPLE
                        Downsampling
  --outfile OUTFILE     Output JSON file with solution
  --force               Overwrite output file

Valid solvers are:
    astrometryonline
    astrometrylocal
    platesolve2

solveimage:

Solves an existing image.

usage: pyastrometry_cli solveimage <filename> [<args>]

Solve Parameters

optional arguments:
  -h, --help            show this help message and exit
  --profile PROFILE     Name of astro profile
  --solver SOLVER       Solver to use
  --pixelscale PIXELSCALE
                        Pixel scale (arcsec/pixel)
  --downsample DOWNSAMPLE
                        Downsampling
  --outfile OUTFILE     Output JSON file with solution
  --force               Overwrite output file

Valid solvers are:
    astrometryonline
    astrometrylocal
    platesolve2

sync:

Takes an image with the camera and solves it and syncs mount to solution.

usage: pyastrometry_cli sync [<args>]

Solve Parameters

optional arguments:
  -h, --help            show this help message and exit
  --profile PROFILE     Name of astroprofile
  --mount               Name of mount driver
  --camera              Name of camera driver
  --exposure            Exposure time
  --binning             Camera binning
  --solver SOLVER       Solver to use
  --pixelscale PIXELSCALE
                        Pixel scale (arcsec/pixel)
  --downsample DOWNSAMPLE
                        Downsampling
  --outfile OUTFILE     Output JSON file with solution
  --force               Overwrite output file

Valid solvers are:
    astrometryonline
    astrometrylocal
    platesolve2

slewsolve:

Given an RA/DEC position slew to that position and refine slew using plate solving.

usage: pyastrometry_cli slewsolve <ra> <dec> [<args>]

Solve Parameters

optional arguments:
  -h, --help            show this help message and exit
  --profile PROFILE     Name of astroprofile
  --mount               Name of mount driver
  --camera              Name of camera driver
  --exposure            Exposure time
  --binning             Camera binning
  --solver SOLVER       Solver to use
  --pixelscale PIXELSCALE
                        Pixel scale (arcsec/pixel)
  --downsample DOWNSAMPLE
                        Downsampling
  --outfile OUTFILE     Output JSON file with solution
  --force               Overwrite output file

Valid solvers are:
    astrometryonline
    astrometrylocal
    platesolve2

Using an astroprofile¶

If specified an astroprofile will be used to get camera and mount driver information as well as the pixelscale used for platesolving.

pyastrometry¶

pyastrometry package¶

Submodules¶

pyastrometry.ASTAP module¶

pyastrometry.AstrometryNetLocal module¶

pyastrometry.Pinpoint module¶

pyastrometry.PlateSolve2 module¶

pyastrometry.PlateSolveSolution module¶

class pyastrometry.PlateSolveSolution.PlateSolveSolution(radec, pixel_scale, angle, binning)¶

Bases: object

Stores solution from plate solve engine

Parameters

radec (SkyCoord) – RA/DEC of center of image.
pixel_scale (float) – Pixel scale in arc-seconds/pixel
angle (Angle) – Sky roll angle of image.

Create solution object