Physical Information: Based on a recessional velocity relative to the Cosmic Microwave Background radiation of 1985 km/sec (and H₀ = 70 km/sec/Mpc), PGC 52091 is about 90 to 95 million light-years away, in good agreement with redshift-independent distance estimates of about 40 to 140 million light-years (the HST press release uses a value of 130 million light-years). Given that and its apparent size of about 1.55 by 1.3 arcmin (from the images below), the galaxy is about 40 thousand light-years across if at the Hubble Flow distance, and about 55 to 60 thousand light-years across if at the HST press release distance. The galaxy is one of a number of relatively nearby galaxies in which HST studies are being used to calibrate the Cosmic Distance Scale by comparing brightnesses of Cepheid variables in our own galaxy to similar variables in the other galaxies, and supernova observations in those galaxies to similar supernovae in much more distant galaxies, whence the press release that led to this entry.