Page last updated Dec 8, 2017
PGC 53183
A magnitude 14.2 spiral galaxy (type Sbc?) in Libra (RA 14 53 07.8, Dec -19 44 13)
Physical Information: Based on a recessional velocity of 3980 km/sec (and H0 = 70 km/sec/Mpc), PGC 53183 is about 185 million light years away, in reasonable agreement with redshift-independent distance estimates of about 115 to 185 million light years (the Dec 4, 2017 press release for the HST image quotes a distance of around 185 million light years). Given that and its apparent size of about 1.4 by 0.2 arcmin (from the images below), the galaxy is about 75 thousand light years across. It is of particular interest because it is the source of the second-closest gamma-ray burst thus-far detected (in October, 2011), and because the nature of the burst appears to be different from any previously observed.
Above, a 12 arcmin wide DSS image centered on PGC 53183
Below, a 1.5 arcmin wide PanSTARRS image of the galaxy
Below, a 1.4 by 1.35 arcmin wide HST image of the galaxy (Image Credit ESA/Hubble & NASA)
PGC 53466 (= western component of IC 4518)
A magnitude 14(?) spiral galaxy (type Sc? pec) in Lupus (RA 14 57 41.1, Dec -43 07 55)
(See IC 4518 for anything else)
PGC 53467 (= eastern component of IC 4518)
A magnitude 16(?) spiral galaxy (type Sc? pec) in Lupus (RA RA 14 57 44.5, Dec -43 07 53)
(See IC 4518 for anything else)
PGC 53471 (= PGC 53467, or nonexistent)
A mistaken entry. Nothing exists at its supposed position, except PGC 53467.
|