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NGC 121

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Distance from Sun: 64900 pc Age: 10.5 Gyr V-band magnitude: 10.61 Mass: 2.1 · 105 M☉ Half-mass radius: 8.86 pc Power-law MF slope: α = -0.96

Image Source: NASA, Wikisky

Observations
Proper motion	Velocity Dispersion
HST photometry	Color magnitude diagram	Mass function
N-body Fits
Surface density	Proper motions	Radial velocities
Remnant fraction	Mass-to-light ratio