Two Arps: Arp 302 and Arp 177 (Richard Francis)

Celestial hemisphere: Northern · Constellation: Boötes (Boo) · Contains: HD131972 · HD132005 · HD132304 · HD132504 · HD132524

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Two Arps: Arp 302 and Arp 177

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Two Arps: Arp 302 and Arp 177

In the centre of this image, very small, are two interacting galaxies. One is face-on and the other edge-on. They are entry 302 in Arp's catalogue of peculiar galaxies.

This object is rather small for my imaging system but it was identified as the "Object of Interest" for May 2024 by the Deep Sky Section of the British Astronomical Association, so I thought I'd have a go at it. In fact my filed of view is sufficiently large that I captured another Arp, number 177, about 60% of the way from Arp 302 to the bottom edge.

Arp 302 turns out to be an interesting object: it is very luminous in the infrared (IR). According to a report in Astrophysical Journal Letters in 1997 it has the highest CO (carbon monoxide) luminosity known. The large spatial extent of the CO emission distinguishes it from starburst galaxies. Arp 302 is assumed to be in a pre-starburst phase.

AAA : Astronomes et Astrographes Amateurs
Astrophotographes (France)
Narrowband imaging
UK Astro-Imaging
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Status	Advanced success
Started	...
Astrometry.net job	9889540
PixInsight job	ERXYEH8HW91XU57MKBB693QHVUHIWB8C
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h56m53s.879
RA (top/left)	14h58m58s.231
RA (top/right)	14h59m00s.717
RA (bottom/right)	14h54m48s.517
RA (bottom/left)	14h54m48s.631

Dec (center)	+24°35′56″.82
Dec (top/left)	+23°57′45″.58
Dec (top/right)	+25°13′50″.65
Dec (bottom/right)	+25°14′02″.71
Dec (bottom/left)	+23°58′00″.32

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Two Arps: Arp 302 and Arp 177

Two Arps: Arp 302 and Arp 177

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Two Arps: Arp 302 and Arp 177

Two Arps: Arp 302 and Arp 177

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