Initial grades: small visual (<0.5m) 0.5 large visual (>0.5m) 1.0 small speckle (<1m) 5.0 medium speckle (<3m) 10.0 large speckle (>3m) 20.0 Anderson & Merrill 10.0 Hipparcos 10.0 FGS 20.0 multi-aperture int. 50.0 AO