Apparent size 0.5 by 0.3 arcmins (no other data available)

Apparent size 1.4 by 0.8 arcmins (no other data available).

Apparent size 1.2 by 0.3 arcmins (no other data available)

Presumably misidentified as a nebula because of optical imperfections in Bigourdan's telescope.

Based on recessional velocity of 9610 km/sec, about 430 million light years distant. Given that and its apparent size of 1.4 by 0.9 arcmins, about 180 thousand light years in diameter.

Historical Identification: Per Dreyer, IC 5305 (Kobold (#21), 1860 RA 23 10 59, NPD 80 28.1), is "pretty faint, very small, 7594 near." The position precesses to RA 23 18 01.8, Dec +10 17 45, just over 1 arcmin west-southwest of the galaxy listed above, the description fits (including the relative nearness of NGC 7594) and there is nothing else nearby, so the identification is certain.
Discovery Information: Per Gottlieb, Andrew Common observed the region near the future NGC 7594 in August of 1880. Common wrote (about the future NGC 7594) "following (to the east of) 3 stars in a line 90 degrees (north-south) pointing to another fainter nebula (to the) south." An image of the region near NGC 7594 shows that the northernmost of the "3 stars in a line" must have been the future IC 5305, but since he did not realize that it was nebulous, credit for the discovery goes to Kobold. (For more about Common's observation, see IC 1478.)
Physical Information: Based on a recessional velocity relative to the Cosmic Background Radiation of about 10120 km/sec (and H₀ = 70 km/sec/Mpc), a straightforward calculation indicates that IC 5305 is about 470 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 450 to 455 million light-years away at the time the light by which we see it was emitted, a little over 460 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 0.58 by 0.33 arcmin (from the images below), the galaxy is about 75 thousand light-years across.
Classification Note: LEDA calls this a spiral of type Sa, while NED lists no "type". In the images below, there are small hints of spiral structures on the edge of an otherwise featureless image, so it appears that this is a lenticular galaxy very close to the dividing line between lenticular and spiral structures, whence the type shown in the description line near the top of this entry.

Apparent size 0.6 by 0.25 arcmins (no other data available). In the image above, IC 5306 is the brighter spiral, aligned east and west (horizontally) at bottom center. The fainter spiral running north and south (vertically) next to it is the much more distant CGCG 431-036 NED01(= PGC 1376799, which is almost always misidentified as part of IC 5306.
NED 3K Vr 7227 km/sec; therefore not connected with PGC 1376799

Historical Misidentification: Often listed as part of IC 5306, but far too faint to be part of what Kobold saw, and although an "apparent" companion of IC 5306, actually a far more distant background galaxy.
NED RIDE1 213 Mpc, 3K Vr 11830 km/sec, z z 0.0394608
Physical Information: To be added ASAP

Apparent size 0.4 by 0.25 arcmins (no other data available). See the image above (?).

Nothing exists at the recorded position

Nothing exists at the recorded position