Page last updated Dec 25, 2015|
A magnitude 17(?) galaxy (type S0?) in Sextans (RA 10 39 42.3, Dec -06 42 42)
Physical Information: Based on a recessional velocity of 38060 km/sec, a straightforward calculation indicates that PGC 113500 is about 1770 to 1775 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 1530 to 1535 million light years away at the time the light by which we see it was emitted, about 1625 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 its apparent size of about 0.15 by 0.1 arcmin, the galaxy is about 65 to 70 thousand light years across.
Above, a 12 arcmin wide DSS image centered on PGC 113500
Below, a 0.6 arcmin wide DSS image of the galaxy