दृश्य परिमाण कैलकुलेटर — सूत्र

Apparent Magnitude

Apparent magnitude (m) is how bright a star appears from Earth.

Distance Modulus

m = M + 5 log10(d / 10)

  • *M* = absolute magnitude (brightness at 10 pc)
  • *d* = distance in parsecs

    • Lower magnitudes are brighter. Each magnitude step is a factor of ≈2.512 in brightness.

    हल किया गया उदाहरण

    The Sun has M = 4.83. How bright would it be at 10 pc?

    1. m = M + 5 log10(d/10)
    2. m = 4.83 + 5 log10(10/10)
    3. m = 4.83 + 5 × 0 = 4.83
    4. At 10 pc the Sun would be a modest naked-eye star.