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Title	Distance to the Virgo cluster galaxy M100 from Hubble Space Telescope observations of Cepheids
Authors	Freedman, Wendy L.; Madore, Barry F.; Mould, Jeremy R.; Hill, Robert; Ferrarese, Laura; Kennicutt, Robert C.; Saha, Abhijit; Stetson, Peter B.; Graham, John A.; Ford, Holland; Hoessel, John G.; Huchra, John; Hughes, Shaun M.; Illingworth, Garth D.
Bibcode	1994Natur.371..757F Search ADS ↗
Abstract	Accurate distances to galaxies are critical for determining the present expansion rate of the Universe or Hubble constant (H₀). An important step in resolving the current uncertainty in H₀ is the measurement of the distance to the Virgo cluster of galaxies. New observations using the Hubble Space Telescope yield a distance of 17.1 +/- 1.8 Mpc to the Virgo cluster galaxy M100. This distance leads to a value of H₀ = 80 +/- 17 km s^-1 Mpc^-1. A comparable value of H₀ is also derived from the Coma cluster using independent estimates of its distance ratio relative to the Virgo cluster.
Objects	4 Objects Search NED ↙

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