APPARENT  MAGNITUDES  OF  SELECTED  OBJECTS

Object

 mv  

Object

 mv
 Sun    -26.73   *Saturn       0.6
 100-watt Light Bulb @ 10' (efficiency = 10%)    -16.3    Altair (11)       0.76
 Full Moon    -12.6    Betelgeuse (12)       0.8ª
 First/Last Quarter Moon    -10.1    Spica (15)       0.96
 Crab Supernova (plausible guess)      -6.0    α U Mi (Polaris)       2.02ª
         
*Venus      -4.4    β U Mi    "Bowl" stars      2.08
*Jupiter      -2.7    γ U Mi      3.05
*Mars      -2.0   δ U Mi      4.32
 Sirius (stellar brightness rank = 1)      -1.46    ε U Mi      4.95
*Mercury      -0.4    M 31      4.5
         
 Arcturus (4)      -0.06    Dark-sky, naked-eye limit (depends on eyesight) 6.0 to 6.5
 Vega (5)     +0.04    Binocular limit     ≈ 9.
 Capella (6)       0.08    6-inch telescope visual limit   ≈ 12.
 Rigel (7)       0.14     200-inch telescope visual limit   ≈ 19.
 Procyon (8)       0.37    Hubble Space Telescope (CCD)   ≈ 30.
         
*Given planetary magnitudes refer to maximum brightnesses     ªVariable star.  Given magnitude refers to mean brightness.