PGC 52803 (with PGC 2802352 = Arp 47)
A 16th-(B)magnitude spiral galaxy (type SBc?) in Bootes (RA 14 47 15, Dec +18 51 30)
Listed as Arp 47, as an example of a spiral galaxy with a faint companion. Based on recessional velocity of 12350 km/sec, about 550 million light years away. Given that and apparent size of 0.75 by 0.4 arcmin, about 120 thousand light years across. The main companion (to the west, or to the right in the images below) is PGC 2802352. There are also much smaller companions to the east of the eastern component, and to the right of the western component, but they are not dealt with here (save for being visible in the closeup of the multiple system). PGC 2802352 (at RA 14 47 13, Dec +18 51 33) is a 16th-(B) magnitude spiral galaxy (type Sb?) with an apparent size of 0.6 by 0.4 arcmin. Its recessional velocity is unknown, but presuming it is at the same distance as PGC 52803, it is about 90 thousand light years across. |
Above, a 1 arcmin wide closeup of Arp 47
Below, a 12 arcmin wide region centered on the object
PGC 52935 (with PGC 52940 = Arp 261)
A 14th-magnitude peculiar galaxy (type IB(s)m pec) in Libra (RA 14 49 32.9, Dec -10 09 51)
Based on a recessional velocity of 1855 km/sec, PGC 52935 is about 86 million light years away. Given that and its apparent size of 1.7 by 0.85 arcmin, it is about 40 thousand light years across. PGC 52935 is part of an interacting or collisional pair (or perhaps triplet) listed as Arp 261. The interaction between the galaxies has considerably distorted their shapes, and caused spectacular bursts of star formation. The interaction also proves that whatever their distance, both galaxies are at essentially the same distance from us, as they are obviously in direct physical contact. |
Above, a closeup of the interacting galaxies (Image Credits: ESO)
Below, a labeled version of the image above
Below, a 12 arcmin wide composite view centered on the object
PGC 52940 (with PGC 52935 = Arp 261)
A 13th-magnitude galaxy (type IB(s)m pec) in Libra (RA 14 49 30.6, Dec -10 10 24)
Based on a recessional velocity of 1835 km/sec, PGC 52940 is about 85 million light years away, in reasonable agreement with a redshift-independent distance estimate of 94 million light years. Given that and its apparent size of 3.0 by 2.0 arcmin, it is about 75 thousand light years across. PGC 52940 is part of an interacting or collisional pair with PGC 52935, which see for images, listed as Arp 261. The interaction between the galaxies has considerably distorted their shapes, and caused spectacular bursts of star formation. The interaction also proves that whatever their distance, both galaxies are at essentially the same distance from us, as they are obviously in direct physical contact. |
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