如何將提取的星圖點與星表匹配

Question

我使用https://photutils.readthedocs.io/en/stable/從我的 FITS 圖像中提取星點，這在 python 中相對容易且整齊地管理。
現在，我想將圖像中提取的“可能”星星與目錄中的星星進行匹配，以獲取每個像素的星星 RA DEC 坐標。 有沒有人已經在python中做過這個？ 或者有什么指示？

Answer 1

您可以在本地下載、構建和運行 astrometry.net 代碼

https://astrometrynet.readthedocs.io/en/latest/build.html

http://astrometry.net/doc/readme.html#tricks-and-tips

solve-field 程序具有加快搜索速度的可選參數

SOLVE-FIELD(1)                  astrometry.net                  SOLVE-FIELD(1)

NAME
       solve-field - Main high-level command-line user interface.

SYNOPSIS
       solve-field  [options]  [image-file-1  image-file-2  ...]  [xyls-file-1
       xyls-file-2 ...]

[...]

   -3 RA, --ra RA
          RA of field center for search, format: degrees or hh:mm:ss

   -4 DEC, --dec DEC
          DEC of field center for search, format: degrees or hh:mm:ss

   -5 degrees, --radius degrees
          Only search in indexes within 'radius' of the field center given
          by --ra and --dec

   -d, --depth number or range
          Number  of  field  objects to look at, or range of numbers; 1 is
          the brightest star, so "-d 10" or "-d 1-10" mean look at the top
          ten brightest stars only.

   --objs int
          Cut  the  source list to have this many items (after sorting, if
          applicable).

[...]

   -z, --downsample int
          Downsample the image by factor int before running source extraction