PGC 49280 has a recessional velocity of 12180 km/sec. Its obvious interaction with PGC 3442468 implies that the galaxies are at about the same distance. Given that galaxy's recessional velocity of 12415 km/sec, a straightforward calculation based on their average recessional velocity indicates a distance for the pair of about 575 million light years. However, for objects at such distances we should take into account the Universal expansion during the time it took their light to reach us. Doing that shows that the pair was about 545 million light years away at the time the light by which we see them was emitted, about 555 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 0.6 by 0.6 arcmin, IC 950 is about 95 thousand light years across. This does not take into account the pair's extensive region of interaction, which spans about 1.1 arcmin, or 175 thousand light years.

As noted in the entry for IC 950 (which see for images and further discussion), PGC 3442468's recessional velocity of 12415 km/sec, when combined with the recessional velocity for the larger galaxy, yields an approximate distance of 545 million light years. Given that and its apparent size of 0.3 by 0.2 arcmin, PGC 3442468 is about 50 thousand light years across.

Apparent size 1.2 by 1.2 arcmin?

Apparent size 1.3 by 0.4 arcmin?

Per Corwin, this is one of several objects (including IC 955 and 957) that are probably irretrievably lost. The next iteration of this page will include a position based on the IC coordinates. (Steinicke lists this as a star at RA 13 54 57.0, Dec -30 17 00, but there is nothing there.)

Apparent size 1.1 by 0.6 arcmin?

Per Corwin, this is one of several objects (including IC 953 and 957) that are probably irretrievably lost.

Apparent size of PGC 49444 is about 0.3 by 0.3 arcmin? of PGC 3441829 about 0.4 by 0.3 arcmin?

Per Corwin, this is one of several objects (including IC 953 and 955) that are probably irretrievably lost.

Historical Identification: Per Dreyer, IC 958 (Swift list IX (#39), 1860 RA 13 48 45, NPD 84 16.7) is "most extremely faint, pretty small, irregularly round". The position precesses to RA 13 55 47.0, Dec +05 02 02, about 3.7 arcmin northwest of the galaxy listed above, the description is fairly reasonable and there is nothing else nearby, so the identification is essentially certain.
Minor Identification Caveat: Corwin notes that Swift's error in the position was pretty typical of his wide-field observations, and feels almost certain that IC 958 is a duplicate observation of NGC 5360. His only concern is that Swift did not mention the much larger and brighter NGC 5364, which is only a few arcmin to the east of NGC 5360. However, it is conceivable that the first NGC having already been in print Swift realized that the brighter galaxy was already known, and therefore didn't bother to note the fact that his IX #39 was to the west of that (a bit atypical for him, but not unprecedented). In any event, no one has suggested that IC 958 is any other object, or objected to its assignment as a duplicate observation of NGC 5360.
Physical Information: Given the probable duplicate entry, see NGC 5360 for anything else.

Apparent size 1.7 by 1.0 arcmin?

Apparent size of PGC 49535 is about 1.4 by 0.7 arcmin(?); of PGC 49536 is about 0.9 by 0.2 arcmin(?)

Apparent size 0.7 by 0.7 arcmin?

Apparent size 0.8 by 0.8 arcmin?

Apparent size 0.7 by 0.5 arcmin? (Steinicke says "double system")

Apparent size 0.3 by 0.3 arcmin?

Apparent size 0.9 by 0.7 arcmin?

Apparent size 0.8 by 0.7 arcmin?

Apparent size 0.8 by 0.4 arcmin?

Apparent size of PGC 49866 about 0.8 by 0.5 arcmin(?); of PGC 1080186, about 0.5 by 0.3 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 1.0 by 0.3 arcmin?

The second IC adds "Description is: Fine spiral, pretty large, much brighter middle (per Wolf, A.N. 4013.)" Apparent size 2.3 by 1.3 arcmin?

Apparent size 0.9 arcmin?

Apparent size 0.5 by 0.3 arcmin?

Apparent size 1.5 by 0.7 arcmin?

Apparent size 0.7 by 0.6 arcmin?

Apparent size 0.7 by 0.3 arcmin?

Apparent size 1.0 by 0.7 arcmin?

Apparent size 0.5 by 0.5 arcmin?

Apparent size 0.7 by 0.3 arcmin?

Apparent size 1.0 by 1.0 arcmin? Used by the Arp Atlas as an example of an elliptical galaxy close to and perturbing a spiral galaxy (IC 983).

Apparent size 3.9 by 2.6 arcmin? Used by the Arp Atlas as an example of an elliptical galaxy (IC 982) close to and perturbing a spiral galaxy.

Apparent size 1.9 by 0.5 arcmin?

Apparent size 0.5 by 0.3 arcmin?

Apparent size 0.6 by 0.6 arcmin?

Apparent size 1.3 by 0.6 arcmin?

Apparent size 0.5 by 0.4 arcmin?

Apparent size 1.3 by 1.1 arcmin?

Historical Identification:
Discovery Notes: See here for a discussion of Dreyer's probable observation of IC 990.
Physical Information: Based on a recessional velocity of 7680 km/sec, a straightforward calculation indicates that IC 990 is about 355 to 360 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 345 to 350 million light years away at the time the light by which we see it was emitted, about 350 to 355 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 0.6 by 0.4 arcmin, the galaxy is about 60 thousand light years across.

Apparent size 1.5 by 0.9 arcmin?

Apparent size 1.3 by 0.8 arcmin?

Apparent size 0.3 by 0.2 arcmin?

Apparent size 1.3 by 0.5 arcmin?

Apparent size 1.6 by 0.4 arcmin?

Apparent size 1.4 by 0.2 arcmin?

Per Dreyer, IC 997 (= Swift list X (#4), 1860 RA 14 12 38, NPD 93 50.0) is "pretty faint, small, round, star to north". The position precesses to RA 14 19 55.9, Dec -04 28 45, only a couple of arcmin south southwest of the galaxy listed above, and there is a 12th magnitude star north of it, so the identification seems certain. Apparent size of PGC 51220 about 1.4 by 0.7 arcmin(?); of PGC 1057935 about 1.0 by 0.5 arcmin?

Per Dreyer, IC 998 (= Swift list X (#5), 1860 RA 14 12 56, NPD 93 49.0) is "most extremely faint, small, round, very difficult". The position precesses to RA 14 20 13.9, Dec -04 27 43, several arcmin from the only object that seems a reasonable candidate, but since IC 998 was observed on the same night as the nearby IC 997, their relative IC positions may be a better indicator of the correct coordinates. That would place IC 998 at RA 14 20 18, Dec -04 26 10, only an arcmin south of the galaxy listed above, and the relative brightness of the two galaxies matches Swift's descriptions, so the identification seems certain. Apparent size 0.95 by 0.25 arcmin?

Apparent size 0.8 by 0.4 arcmin?