Based on a recessional velocity of 749t km/sec, NGC 5652 is about 335 million light years away, in good agreement with redshift-independent distance estimates of 350 to 370 milion light years. Given that and its apparent size of 2.0 by 1.4 arcmin, it is about 200 thousand light years across.

The second IC lists a corrected NPD (per Bigourdan) of 75 25. Apparent size 1.1 by 0.9 arcmin. (Note: NGC 5655 is often erroneously called NGC 5649, which see for the reason, and an image.)

The first IC lists a corrected RA (per Ormond Stone) of 14 27 05. The second IC adds "RA is 14 26 04 according to Howe, but Ormond Stone has 14 27 05". (Obviously a situation ripe for a multiple listing.) Apparent size 0.8 by 0.3 arcmin.

NGC 5665 is one of Arp's examples of a spiral galaxy with a small bright companion. However, as shown by the box superimposed on the main galaxy image, the compact (0.08 by 0.07 arcmin) "companion" (NGC 5665A) may simply be a brighter part of the larger galaxy. Its recessional velocity is within the error bar for the recessional velocity of NGC 5665, and it lies along one of the spiral arms, where hot bright clusters of stars might be expected to lie. In fact, there is a large population of such regions in NGC 5665, which suggest an episode of "starburst" formation, presumably due to an interaction with some other galaxy about half a billion years ago. Based on a recessional velocity of 2230 km/sec, NGC 5665 is about 105 million light years away, in good agreement with redshift-independent distance estimates of 65 to 115 million light years. Given that and its apparent size of 2.05 by 1.1 arcmin, it is about 60 thousand light years across.

NGC 5665 is one of Arp's examples of a spiral galaxy with a small bright companion, said companion being listed as NGC 5665A. However, as shown by the box superimposed on the closeup of NGC 5665 above, the compact (0.08 by 0.07 arcmin) "companion" may simply be a brighter part of the larger galaxy. Its recessional velocity is within the error bar for the recessional velocity of NGC 5665, and it lies along one of the spiral arms, where hot bright clusters of stars might be expected to lie. In fact, there is a large population of such regions in NGC 5665, which suggest an episode of "starburst" formation, presumably due to an interaction with some other galaxy about half a billion years ago. The recessional velocity for NGC 5665A suggests a distance of about 110 million light years, essentially the same as for NGC 5665. Given that and its apparent size, it is less than 2 thousand light years across, which is far more likely to make it a stellar birthplace within NGC 5665 than a separate galaxy.

Apparent size 1.1 by 0.7 arcmin. Recessional velocity 8655 km/sec. Probably an optical double with its supposed companions.

Apparent size 0.8 by 0.4 arcmin. Recessional velocity 7675 km/sec. Probably a companion of "NGC 5679C", but an optical double with NGC 5679, which see for images.

Apparent size 0.3 by 0.2 arcmin. Recessional velocity 7790 km/sec. Probably a companion of "NGC 5679A", but an optical double with NGC 5679, which see for images. Listed in NED as NGC 5679 NED03.

Although Herschel was the prior observer, a one degree error in his sister's reduction of his observations meant that his object was essentially "lost" until Dreyer discovered the error during a 1912 compilation of Herschel's observations. So Stephan's discovery was completely independent, and due to his more accurate position, the galaxy came to be known as NGC 5706 despite that designation referring to the later observation. For that reason this entry contains only historical information, and physical data and pictures are provided at the entry for NGC 5706.