Celestial Atlas
PGC 59500 - 59999 ←     PGC Objects: PGC 60000 - 60499 Link for sharing this page on Facebook     → PGC 60500 - 60999
Click here for Introductory Material
Page last updated Aug 29, 2015

PGC 60067 (with
PGC 60070 = Arp 102)
A 15th-magnitude elliptical galaxy (type E0?) in Hercules (RA 17 19 14.5, Dec +48 58 49)
Apparent size about 0.75 by 0.75 arcmin. Used in the Arp Atlas as an example of an elliptical galaxy connected to a spiral galaxy (PGC 60070). A Seyfert galaxy (type Sy 1).
DSS image of elliptical galaxy PGC 60067, a component of Arp 102
Above, a 2.4 arcmin wide closeup of PGC 60067 (see PGC 60070 for additional images)

PGC 60070 (with
PGC 60067 = Arp 102)
A 15th-magnitude spiral galaxy (type SABb? pec) in Hercules (RA 17 19 21.4, Dec +49 02 26)
Apparent size about 3.5 by 0.75 arcmin. Used in the Arp Atlas as an example of an elliptical galaxy (PGC 60067) connected to a spiral galaxy.
DSS image of spiral galaxy PGC 60070 and elliptical galaxy PGC 60067, which comprise Arp 102
Above, an approximately 4 by 7 arcmin wide closeup of Arp 102
Below, a 12 arcmin wide region centered on Arp 102
DSS image of region near spiral galaxy PGC 60070 and elliptical galaxy PGC 60067, which comprise Arp 102

PGC 60171 (with
PGC 60174 = NGC 6365 = Arp 30)

PGC 60174 (with
PGC 60171 = NGC 6365 = Arp 30)

PGC 60379, part of the Sacred Mushroom
Nickname from Arp & Madore's "Catalogue of Southern Peculiar Galaxies and Associations" (1987)
A magnitude 12(?) lenticular galaxy (type (R)SAB0(s)/a? pec) in
Ara (RA 17 29 09.5, Dec -62 26 44)
Physical Information: PGC 60379 is obviously interacting with PGC 60386, so they must be at the same distance from us, and their average recessional velocity should be a better indicator of their distance than either of their individual radial velocities. The radial velocity for PGC 60379 is 4640 km/sec, and for PGC 60386 is 4800 km/sec, so their average recessional velocity is 4720 km/sec, which corresponds to a distance of about 220 million light years, in fair agreement with a single redshift-independent distance estimate for PGC 60379 of about 180 million light years. Given that and its apparent size of about 2.3 by 1.5 arcmin, PGC 60379 is 145 to 150 thousand light years across, and the apparent size of the system (the two galaxies and the material between them) of about 3.85 by 2.3 arcmin corresponds to 245 to 250 thousand light years.
System Dynamics: The spiral galaxy down and to the left (that is, to the southeast) of PGC 60379 is moving down and to the left relative to our line of sight (unfortunately, at an unknown speed, as there is no way to measure sideways motions in distant galaxies), and away from us relative to the larger galaxy at about 100 miles per second (almost 2000 times slower than the speed of light). This means it takes the best part of 2000 years for it to move a light year closer to or away from the larger galaxy, and about 150 million years to move a distance equal to its own size. A thousand million years ago the spiral would have been somewhat up and to the right (northwest) of PGC 60379, and a couple of hundred thousand light years in front of it, but due to its motion it gradually moved toward, through and then away from the larger galaxy, so that it is now behind it. If their collision had been a direct hit, the core of the larger galaxy would have been blown out of the galaxy, leaving behind only a gradually spreading ring of new stars caused by the compression of gases by a "shock wave" expanding away from the position of the "impact", and the resulting wave of star formation passing through the remnants of the galaxy (the stars would not be moving outwards, just the "wave" of star formation). However, the impacting spiral apparently hit just "above" the core, still causing a gradually expanding wave of star formation, but leaving much of the original galaxy structure more or less in place. (Keep in mind that since the galaxies are over 200 million light years away, "now" means at the time the light by which we see them was emitted, over 200 million years ago.)
DSS image of region near peculiar lenticular galaxy PGC 60379 and peculiar spiral galaxy PGC 60386, which comprise the so-called Sacred Mushroom
Above, a 12 arcmin wide DSS image centered on PGC 60379, also showing PGC 60386
Below, a 4.5 arcmin wide image of the pair (Image Credit & © Capella Observatory; used by permission)
Capella Observatory image of peculiar lenticular galaxy PGC 60379 and peculiar spiral galaxy PGC 60386, which comprise the so-called Sacred Mushroom
Below, a 2.8 arcmin wide version of the image above
Capella Observatory image of peculiar lenticular galaxy PGC 60379, part of the so-called Sacred Mushroom

PGC 60386, part of the Sacred Mushroom
Nickname from Arp & Madore's "Catalogue of Southern Peculiar Galaxies and Associations" (1987)
A magnitude 13.5(?) spiral galaxy (type SB(s)ab? pec) in
Ara (RA 17 29 25.3, Dec -62 28 50)
Physical Information: PGC 60386 is obviously interacting with PGC 60379, so they must be at the same distance from us, and their average recessional velocity should be a better indicator of their distance than either of their individual radial velocities. The radial velocity for PGC 60379 is 4640 km/sec, and for PGC 60386 is 4800 km/sec, so their average recessional velocity is 4720 km/sec, which corresponds to a distance of about 220 million light years, in fair agreement with a single redshift-independent distance estimate for PGC 60379 of about 180 million light years. Given that and its apparent size of about 1.1 by 0.45 arcmin, PGC 60386 is about 70 thousand light years across, and the apparent size of the system (the two galaxies and the material between them) of about 3.85 by 2.3 arcmin corresponds to 245 to 250 thousand light years.
System Dynamics: See PGC 60379 for a discussion of the system dynamics.
Capella Observatory image of peculiar spiral galaxy PGC 60386, part of the so-called Sacred Mushroom
Above, a 2 arcmin wide image of PGC 60386; for wider-field images see PGC 60379
(Image Credit & © Capella Observatory; used by permission)

PGC 60393 (=
NGC 6412 = Arp 38)
Celestial Atlas
PGC 59500 - 59999 ←     PGC Objects: PGC 60000 - 60499     → PGC 60500 - 60999