| Attribute name | Attribute type | Docstring | Unit | VO-UCD |
|---|
| 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 | |
|
| r | float | Radius of circle | pixel |
|
| x | float | X position of center of circle | pixel |
|
| y | float | Y position of center of circle | pixel |
|
