Page last updated June 26, 2017|
A magnitude 15(?) spiral galaxy (type Sbc) in Virgo (RA 14 34 50.5, Dec +03 38 43)
Physical Information: Based on a recessional velocity of 8590 km/sec (and H0 = 70 km/sec/Mpc), a straightforward calculation indicates that PGC 52112 is about 400 million light years away. However, for objects at such distances we should take into account the expansion of the Universe during the time it took their light to reach us. Doing that shows that the galaxy was about 385 to 390 million light years away at the time the light by which we see it was emitted, about 390 to 395 million years ago (the difference between the two numbers being due to the expansion of the intervening space during the light-travel time). Given that and an apparent size for the main galaxy of about 0.35 by 0.3 arcmin, and for its fainter outer regions of about 0.5 by 0.4 arcmin (from the HST images below), the galaxy is about 40 thousand light years across, and its fainter outer regions span more than 55 thousand light years. PGC 52112 is a Seyfert galaxy (type Sy 1), and a strong X-ray emitter.
Above, a 12 arcmin wide SDSS image centered on PGC 52112
Below, a 0.6 arcmin wide SDSS image of the galaxy
Below, a 0.6 arcmin wide HST image of the galaxy (Image Credit ESA/Hubble & NASA)
Below, the above image enhanced to show fainter outer regions