Page last updated Dec 26, 2015|
A magnitude 15(?) spiral galaxy (type Sc?) in Grus (RA 21 39 21.4, Dec -41 56 02)
Physical Information: Based on a recessional velocity of 18835 km/sec, a straightforward calculation indicates that PGC 126500 is about 875 to 880 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 815 million light years away at the time the light by which we see it was emitted, about 840 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 0.25 by 0.2 arcmin, the galaxy is about 60 to 65 thousand light years across.
Above, a 12 arcmin wide DSS image centered on PGC 126500
Below, a 0.6 arcmin wide DSS image of the galaxy