Kostenloser Distance Modulus Rechner
Berechnen Sie distance aus apparent und absolute magnitudes. Kostenloser distance modulus Rechner.
Entfernung
206.06 pc
Distance vs Apparent Magnitude (m)
Formel
Distance Modulus
The distance modulus (m - M) connects apparent and absolute magnitudes to distance.
Formula
d = 10^((m - M + 5) / 5) parsecs
This is the inverse of the magnitude-distance relation and is fundamental to the cosmic distance ladder.
Lösungsbeispiel
A Cepheid variable has m = 1.43 and M = -5.14.
- 01Distance modulus = m - M = 1.43 - (-5.14) = 6.57
- 02d = 10^((6.57 + 5)/5) = 10^(11.57/5) = 10^2.314
- 03d ≈ 206 pc ≈ 672 ly
Häufig Gestellte Fragen
What is a standard candle?
An object with a known absolute magnitude (like a Type Ia supernova or Cepheid variable), allowing distance measurement via the distance modulus.
What distance modulus corresponds to 10 Mpc?
m - M = 5 log10(10^7/10) = 5 × 6 = 30. Such large moduli apply to distant galaxies.
Does interstellar dust affect this?
Yes. Dust dims light (extinction), making objects appear farther than they are. Corrections for reddening are essential.