Use these finders to locate the Arp targets discussed in the Going Deep column in the October 2021 issue.

In the October 2021 issue of Sky & Telescope, author Ivan Maly describes how to locate and observe a handful of peculiar galaxies that American astronomer Halton Arp first cataloged in 1966 in his Atlas of Peculiar Galaxies. Maly's selection are all well-placed in the autumn skies — you'll find them in southeastern Pisces and Cetus. We've collated finder charts here to guide the observer.

Finder for Going Deep October 2021
Ppeculiar Collection The Arp galaxies discussed here are located in Cetus and southeastern Pisces. Use this chart to locate the general area of the targets — detailed finders for individual objects are below. You can also use the coordinates in the table on page 57 of the October issue of Sky & Telescope. Click on the chart for a larger version. Click here for a black-and-white PDF for printing.
Finder for Arp 164
Arp 164. All finders here are Digitized Sky Survey images. Some of them, like the one pictured above, have criss-crossing satellite trails. Start your Arp adventure a little more than 4° southeast of Epsilon (ε) Piscium to bag Arp 164.
POSS-II / STScI / Caltech / Palomar Observatory (all images)
finder for Arp 121
Arp 121. Head to Eta (η) Ceti and from there look a little less than 6° north-northwest to find this field.
Finder for Arp 100
Arp 100. You'll come upon this scene about 3½° southeast of Iota (ι) Ceti.
Finder for Arp 133 and Arp 308
Arp 133 and 308. To snag this collection head to Theta (θ) Ceti and slew 6¾° almost due north.
Finder for Arp 230
Arp 230. Look for this tight duo 4½° north of Beta (β) Ceti.
Finder for Arp 126
Arp 126. Head back to Pisces and position your scope about halfway between Alpha (α) and Xi (ξ) Piscium to spot this peculiar galaxy.


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