IC 4051 and NGC 4908 are often confused with each other (for instance, Wikisky and HyperLeda show each with the other's label). Part of galaxy cluster Abell 1656. Based on a recessional velocity of 8795 km/sec, IC 4051 is about 410 million light years away. Given that and its apparent size of 0.9 by 0.5 arcmin, it is about 110 thousand light years across.

(See IC 4053 for images.)

Listed as questionable in the Index Catalog.

Apparent size 0.8 by 0.6 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 0.3 by 0.3 arcmin?

Apparent size 0.7 by 0.5 arcmin?

Apparent size 0.3 by 0.2 arcmin? Secondary component 0.2 by 0.2 arcmin?

Apparent size 0.5 by 0.4 arcmin.

Apparent size 0.2 by 0.2 arcmin?

Apparent size 1.6 by 1.2 arcmin?

Apparent size 0.8 by 0.4 arcmin?

Apparent size 0.3 by 0.3 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 0.3 by 0.1 arcmin?

Apparent size 0.4 by 0.2 arcmin?

Apparent size 0.8 by 0.5 arcmin?

Apparent size 0.85 by 0.35 arcmin.

Apparent size 0.3 by 0.3 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 0.3 by 0.3 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Per Dreyer, IC 4079 (= Wolf list VI #155, 1860 RA 12 55 03, NPD 69 59.7) is "very faint, very small, attached to next", 'next' referring to IC 4080, which is just northeast of IC 4079. Wolf's original paper adds that there is a 14th magnitude star preceding the object, and that the star's position is what he measured. (See IC 4080 for a further discussion showing that the identifications of IC 4079 and 4080 are certain.) Apparent size 0.35 by 0.2 arcmin. (Shown in Wikisky as PGC 1585609)

Per Dreyer, IC 4080 (= Wolf list VI #156, 1860 RA 12 55 04, NPD 69 59.6) is "faint, very small, 14th magnitude star 0.3 arcmin to west, 15th magnitude star to southeast". The 14th magnitude star is clearly the one mentioned in Wolf's notes for IC 4079, and his notes for IC 4080 add that the 15th magnitude star is 0.4 arcmin to the southeast of that object. These notes and Wolf's positions make it certain that IC 4080 is the pair of galaxies listed above, and IC 4079 is the brighter galaxy immediately to their southwest. Apparent size of PGC 3800908 is about 0.25 by 0.1 arcmin; apparent size of PGC 4538148 is about 0.14 by 0.1 arcmin.

Apparent size 0.3 by 0.2 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 0.4 by 0.3 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 0.9 by 0.8 arcmin?

Apparent size 0.4 by 0.3 arcmin?

Historical Identification: Per Dreyer, IC 4088 (Bigourdan #309, 1860 RA 12 55 09, NPD 60 13) is "extremely faint, suspected; 11th or 12th magnitude star following (to the east) 1.4 arcmin." The position precesses to RA 13 01 52.7, Dec +29 01 45, about 2.1 arcmin east-southeast of the galaxy usually listed as IC 4088, which is a bit bothersome, given Bigourdan's usual accuracy, and 3 arcmin west-northwest of the star that Bigourdan claimed was only 1.4 arcmin away. Looking at images of the region, it seems obvious that "extremely faint, suspected," was correct, and the galaxy usually identified as IC 4088 is not what Bigourdan saw, and IC 4088 is, as shown above, the star lying exactly 1.4 arcmin west-northwest of the magnitude 11.6 star noted by Bigourdan. Given that, I consider the identification above to be certain.
Discovery Note: It seems odd that Bigourdan would have recorded such a faint star and ignored the much brighter galaxy to its west, which as noted above is universally misidentified as Big 309, and therefore IC 4088. But the IC1 was published only four months before Bigourdan observed this region, and although his detailed papers discuss NGC objects and 'novae', they do not mention IC objects. So perhaps he did see the galaxy, but since its position is essentially the same as the IC1 position for IC 843, he presumed that it had already been discovered, and just ignored its existence in his published papers. (If possible, more research needs to be done about that possibility.)
Historical Misidentifications: This is just one of many misidentifications in this region. For instance, the galaxy usually listed as IC 4088 is actually Truman Safford's "IC 843", and the galaxy listed as IC 843 is probably Lawrence Parsons' NGC 4912 (not that Parsons called it that, as that designation was created 23 years after he observed the region). Given the presumably long period of time that "IC 843" and "IC 4088" have been misidentified, whether their identifications will ever be corrected is uncertain; but that is a story for the future.
WARNING: Everything Below Refers To The Galaxy Usually Misidentified As IC 4088, But Is Actually IC 843
*Hopefully this mess will be cleaned up ASAP, and links to corrected entries provided*
Physical Information: Apparent size 1.5 by 0.4 arcmin. A starburst galaxy.

Apparent size 0.2 by 0.2 arcmin?

Apparent size 0.3 by 0.1 arcmin?

Per Dreyer, IC 4094 (= Wolf list V #179, 1860 RA 12 55 26, NPD 51 27.1) is "faint, very small, irregular figure, nuclear". The position precesses to RA 13 01 59.0, Dec +37 47 39, right on the galaxy listed above, so the identification is certain. (There is an apparent companion just to the south (PGC 4351761) that is sometimes mentioned as a possible part of the IC entry, so it is discussed immediately below; but there is nothing in the historical record to indicate that it should be thought of in that way.) Apparent size 0.45 by 0.3 arcmin.

Very unlikely to be part of IC 4094 (which see for images), whose historical position would almost certainly be further south if PGC 4351761 had had any effect on Wolf's measurement. Apparent size 0.25 by 0.1 arcmin.

Apparent size 0.5 by 0.2 arcmin?

Apparent size 0.2 by 0.2 arcmin?

Apparent size 0.5 by 0.35 arcmin.

Apparent size 0.2 by 0.2 arcmin?