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NGC 6638

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Distance from Sun: 9780 ± 340 pc Galactocentric distance: 2300 ± 250 pc V-band magnitude: 8.79 ± 0.10 Mass: 1.2 · 105 M☉ M/L ratio: 1.6 ± 0.3 M☉/L☉ Half-mass radius: 2.28 pc Power-law MF slope: α = 0.71 ± 0.22

Image Credit: PanSTARRS DR1, PS1 Science Consortium

Observations
Cluster distance	Proper motion	Radial velocity
Orbit over the last 500 Myr
Velocity dispersion profile	Rotation	Color magnitude diagram
HST photometry	Mass function	MF slope
N-body Fits
Surface density	Proper motions	Radial velocities
Remnant fraction	Mass-to-light ratio