| Attribute name | Attribute type | Docstring | Unit | VO-UCD |
|---|
| CD1_1 | float | Value at (1,1) of pixel coordinate translation matrix | |
pos.wcs.cdmatrix |
| CD1_2 | float | Value at (1,2) of pixel coordinate translation matrix | |
pos.wcs.cdmatrix |
| CD2_1 | float | Value at (2,1) of pixel coordinate translation matrix | |
pos.wcs.cdmatrix |
| CD2_2 | float | Value at (2,2) of pixel coordinate translation matrix | |
pos.wcs.cdmatrix |
| CRPIX1 | float | Reference pixel in X | pixel |
pos.wcs.crpix |
| CRPIX2 | float | Reference pixel in Y | pixel |
pos.wcs.crpix |
| CRVAL1 | float | Physical value of the reference pixel X | deg |
pos.wcs.crval |
| CRVAL2 | float | Physical value of the reference pixel Y | deg |
pos.wcs.crval |
| CTYPE1 | str | Pixel coordinate system and projection of first axis (X) | |
pos.wcs.ctype |
| CTYPE2 | str | Pixel coordinate system and projection of second axis (Y) | |
pos.wcs.ctype |
| object_id | oidtype | The object identifier
The object identifier is an attribute shared by all persistent
instances. It is the prime key, by which object identity is established | |
|
