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On this page I compile my observations of the gravitationally bound galaxy pair Holm 46 in the constellation Triangulum, consisting of the barred spiral galaxies NGC 672 and IC 1727.
NGC 672 in the constellation Triangulum is a barred spiral galaxy with extensive star-forming regions. Together with the barred spiral galaxy IC 1727, which is less than 90,000 light years away, it forms the gravitationally bound galaxy pair Holm 46.
Three more galaxies can be seen on my Vespera Pro photo: NGC 670 (lenticular galaxy), NGC 684 (edge-on spiral galaxy) und IC 1731 (barred spiral galaxy) ; these three galaxies form the galaxy trio LGG 32.
| NGC 672 (Holm 46) | IC 1727 (Holm 46) | |||
| Size: 6' x 2.4' (Wikipedia) Distance: 25 mio. light years (Wikipedia) Rating: --- |
Size: 5.7' x 2.4' (Wikipedia) Distance: 21 mio. light years (Wikipedia) Rating: --- |
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| NGC 670 (LGG 32) | NGC 684 (LGG 32) | IC 1731 (LGG 32) | ||
| Size: 2,1' x 0,9' (Wikipedia) Distance: 171 Millionen Lichtjahre (Wikipedia) Rating: --- |
Size: 3,2' × 0,6' (Wikipedia) Distance: 163 Millionen Lichtjahre (Wikipedia) Rating: --- |
Size: 1,50' × 1,0' (Wikipedia) Distance: 162 Millionen Lichtjahre (Wikipedia) Rating: --- |
The gravitationally bound galaxy pair Holm 46 in the constellation Triangulum, consisting of the barred spiral galaxies NGC 672 and IC 1727 (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)
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NGC 672 and IC 1727 - Oct 9, 2021 |
NGC 672 and IC 1727 - Oct 9, 2021, the arrow points to the galaxy PGC 1803573 |
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NGC 672 and IC 1727 - Oct 9, 2021, photo on top processed |
NGC 672 and IC 1727 - Oct 9, 2021, ditto |
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NGC 672 and IC 1727 - Nov 21, 2025, 2400 (111 frames = 18:30 min), section |
NGC 672 and IC 1727 - Nov 21, 2025, 2400 (111 frames = 18:30 min), section, processed |
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NGC 672 and IC 1727 - Nov 21, 2025, 2400 (111 frames = 18:30 min), section, processed and denoised (TP) |
NGC 672 and IC 1727 - Nov 21, 2025, evaluation with nova.astronomy.net |
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NGC 672 and IC 1727 - Nov 22, 2025, 2000 (280 frames = 46 min), section |
NGC 672 and IC 1727 - Nov 22, 2025, 2000 (280 frames = 46 min), section, processed |
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NGC 672 and IC 1727 - Nov 22, 2025, 2000 (280 frames = 46 min), section, processed and denoised (TP) |
NGC 672 and IC 1727 - Nov 22, 2025, evaluation with nova.astronomy.net |
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NGC 672 and IC 1727 - Nov 22, 2025, 2000 (280 frames = 46 min), 1:1 section, processed and denoised (TP) |
NGC 672 and IC 1727 - Nov 22, 2025, 2000 (280 frames = 46 min), 1:1 section, processed and denoised (TP); the arrow points to the galaxy PGC 1803573 |
