Hipparcos new reduction (van Leeuwen 2007), VizieR I/311; Gaia DR3 archive; SIMBAD V magnitudes. Used by scripts/pleiades_lost_sister.py
How it connects
This book or paper is where we read about
The six visible Pleiads are the six bright ones; then comes the biggest brightness step in the cluster
This book or paper is where we read about
Pleione is drifting toward Atlas: 5.0 arcmin apart now, about 8.6 arcmin 100,000 years ago