Arp 75 (NGC 702)
Arp 75 is the group in the southeast (lower-left) corner of the image. The
edge-on galaxy with the bright core in the northwest corner is MCG 1-5-40.
Arp 75 is in the class Spirals with Small HSB Companions on Arms. The
companion that Dr. Arp was considering is almost certainly the one about 1' due
east of the core, because the Atlas notes say "very faint extension to
companion". There appears to be another companion right in a bright part
on the arm sweeping north and west, but that does not fit the note. The
extension is very faint, barely showing up in the negative image and, while more
obvious, not prominent in the false color image. The false color
image does show two more arms, one terminating at a faint companion and another
which does not terminate near any companion. Even with 71 minutes of
exposure, the extension and arm are just above the noise level.
|10-inch Newtonian, StarlightXpress MX716, 71 minutes|