June 28, 2017

Arp 125

Arp 125. SDSS.


Arp 125, UGC 10491. VV 501, 356 Mly. June 28, 2017. Cherry Springs, SQM 21.78. 16", 330x. Suggestion of star on S edge of companion. Main component fan-shaped, opens NW. SE end brighter.

Arp 124

Arp 124. SDSS.

Arp 124, NGC 6361. 167 Mly. June 28, 2017. Cherry Springs, SQM 21.78. 16", 330x. Companion slightly elongated. Edge-on very slightly S-shaped, curving away from the companion. N edge brightest E of core and contains a knot. Star NW of companion seen.

Arp 102

Arp 102. DSS.

Arp 102, UGC 10814. VV 10, 315 Mly.  June 28, 2017. Cherry Springs, SQM 21.78. 16", 330x. Component c is a streak W of a star. Repeated suggestion of bridge. Main component with arm along E side, which becomes especially pronounced to S (component b). MCG [+8-31] -41 compact.

Arp 73

Arp 73. SDSS.

Arp 73, IC 1222. 404 Mly.  June 28, 2017. Cherry Springs, SQM 21.78. 16", 330x. S-shaped. Bar ends in condensations. Both the SDSS companion and double star are glimpsed. Star unresolved streak.

Arp 66

Arp 66. SDSS.

Arp 66, UGC 10396. VV 472, 273 Mly.  June 28, 2017. Cherry Springs, SQM 21.78. 16", 330x. "Companion" elongated, arm points at it. Short extension opposite.

June 22, 2017

Arp 32

Arp 32. SDSS III.

Arp 32, "integral sign spiral". VV 89, UGC 10770. Dra. June 22, 2017. Cherry Springs, SQM 21.7. 16" F/4.5. Components resolved with 5.5 mm. Star in between. N component NS, SW end of S component bends sharply S, tapered.

Arp 30

Arp 30. SDSS III.

Arp 30, "spiral with one heavy arm". VV 232. NGC 6365. Dra. A 1996 paper argues that this is a first-pass interacting system.

June 22, 2017. Cherry Springs, SQM 21.7. 16" F/4.5, 5.5 mm. Double star resolved. Edge-on companion points outwards relative to double star and main galaxy center. Other end embedded in halo more than tangentially - hint of enhancement on edge of halo.

Arp 2

Arp 2. SDSS III.

Arp 2, UGC 10310. Her. "Low surface-brightness spiral." Magellanic at 33 Mly. June 22, 2017. Cherry Springs, SQM 21.7. 16" F/4.5, 8 mm. Core double [core and knot N of it on SDSS]. Compact enhancement on W edge.

June 18, 2017

Arp 103

Arp 103. SDSS.

Arp 103, MCG+8-31-3. VV 710, 411 Mly. Zwicky's Triplet.  June 28, 2017. Cherry Springs, SQM 21.78. 16", 330x. UGC 10586, NGC 6241 seen (not parts of the Arp triplet). PGC 59062 fainter than MCG+8-31-3. MCG+8-31-3A seen. (Zwicky's triplet is MCG...-3, -3A, and the PGC - see sketch in the original Zwicky and Humason paper.)