The A sharp minor thirteenth chord is a 6-note chord consisting of the notes A#, C#, E#, G#, B# and F##.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as A#m13.
Chords that are a subset of A#m13. These contain less notes but all of them are included in A#m13.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the A#m13 chord. Feel free to save or share the image as needed.