Page last updated Dec 24, 2015|
A magnitude 18(?) spiral galaxy (type SBb? pec?) in Eridanus (RA 03 25 15.6, Dec -39 18 40)
Physical Information: Based on a recessional velocity of 53190 km/sec, a straightforward calculation indicates that PGC 111500 is about 2475 to 2480 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 2025 to 2030 million light years away at the time the light by which we see it was emitted, about 2200 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 0.2 by 0.15 arcmin, the galaxy is 115 to 120 thousand light years across. It appears to have outer extensions spanning about 0.35 by 0.3 arcmin, or about 205 thousand light years.
Above, a 12 arcmin wide DSS image centered on PGC 111500
Below, a 0.6 arcmin wide DSS image of the galaxy