Celestial Atlas
PGC 6500 - 6999 ←     PGC Objects: PGC 7000 - 7499 Link for sharing this page on Facebook     → PGC 7500 - 7999
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Page last updated Jul 13, 2016

PGC 7090
A magnitude 13.5(?) spiral galaxy (type S(rs)a? pec) in
Cetus (RA 01 54 41.0, Dec -00 08 36)
Physical Information: PGC 7090 is an apparently elliptical galaxy surrounded (per NED) by a very faint, patchy, asymmetrical, and much extended corona. In visible light the corona is almost impossible to see (as shown in the first image). But recent observations in the ultraviolet have revealed that it is actually the core of a giant spiral galaxy, and still more recent observations at radio frequencies has shown that it is pervaded and surrounded by immense clouds of hydrogen gas, making it enormously larger and more massive than its bright core alone would suggest (much as modern observations of galaxies show them as far larger and brighter than century or two old visual observations, but even more so). Based on a recessional velocity of 5770 km/sec, PGC 7090 is about 255 to 260 million light years away (for H = 73 km/sec/Mpc), in good agreement with redshift-independent distance estimates of 250 to 295 million light years. Given that and its apparent size of about 1.5 by 1.0 arcmin, the bright core is about 110 to 115 thousand light years across, while the 7.5 by 4.8 arcmin apparent size of the galaxy's nearly invisible outer regions corresponds to about 560 to 565 thousand light years.
SDSS image of region near spiral galaxy PGC 7090
Above, a 12 arcmin wide SDSS image centered on PGC 7090
Below, a 12 arcmin wide UV/visible composite image of the same region
(Image Credit NASA/JPL/Caltech/SDSS/NRAO/GALEX)
SDSS/GALEX composite image of spiral galaxy PGC 7090
Below, a 12 arcmin wide UV/visible/radio composite image of the same region
(Image Credit as above, but including the VLA radio array)
SDSS/GALEX composite image of spiral galaxy PGC 7090

PGC 7359 (with
PGC 212878 = Arp 56)
A 15th-magnitude spiral galaxy (type Sbc?) in Aries (RA 01 57 26.8, Dec +17 13 14)
Physical Information: Based on a recessional velocity of 8055 km/sec, PGC 7359 is about 375 million light years away. Given that and its apparent size of 0.9 by 0.6 arcmin, it is about 100 thousand light years across.
SDSS image of spiral galaxy PGC 7359 and its apparent companion, PGC 212878, which comprise Arp 56
Above, a 2.4 arcmin wide closeup of PGC 7359 and its apparent companion, PGC 212878
Below, a 12 arcmin wide region centered on the pair
SDSS image of region near spiral galaxy PGC 7359 and its apparent companion, PGC 212878, which comprise Arp 56

PGC 212878 (with
PGC 7359 = Arp 56)
Listed here as an apparent companion of PGC 7359 (which see for images)
An 18th-magnitude galaxy (type pec?) or galaxy part in Aries (RA 01 57 25.1, Dec +17 13 04)
Physical Information: (Listed in NED as UGC 01432 NOTES01.) Apparent size 0.1 by 0.1 arcmin. Probably a small companion of PGC 7359, but possibly just an unusually active part of the larger galaxy. Distance unknown, but if at the same distance as PGC 7359 it would be about 10 thousand light years across
Celestial Atlas
PGC 6500 - 6999 ←     PGC Objects: PGC 7000 - 7499     → PGC 7500 - 7999