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Thread: 2 or More Galaxies, One Field of View Thread

  1. #21
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    Default Re: 2 or More Galaxies, One Field of View Thread



    Mike, at the below link (post #144), I commented on my observation of the NGC 7619 group with the Z10 during a trip to our dark site last year. I have pasted my observational comments below the link. Hope this helps.

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    NGC 7619 Group of Galaxies: Moving to the Pegasus-Pisces border, I next sought out a pair of elliptical galaxies surrounded by several other fainter galaxies. Lying just over 2.5 degrees northwest of 4th magnitude Theta Piscium (the northern most star in the ringlet of Pisces) NGC 7619 (mag 11.3 & SB 13.2) was a small, yet bright round glow with a stellar core at 69x. Viewing at higher magnification intensified its brightness and increased its visual size, but no additional details were revealed. Nearby NGC 7626 (mag 11.5 & SB 13.4) at 69x was a small and bright slightly oval patch, showing a bright core surrounded by a halo. At 114x, its core also took on a stellar appearance, though no further details were revealed. Just to the east of 7626, the spiral NGC 7631 (mag 13.1 & SB 13.3) displayed a faint, elongated smudge that became brighter with averted vision. NGC 7623 (mag 12.8 & SB 12.7), a lenticular galaxy, appeared as a roundish glow with a bright stellar core. Southwest of NGC 7619, in Pisces, I found another lenticular, NGC 7611 (mag 13 & SB 12.8). It presented a dim oval with noticeably bright stellar core. NGC 7612 (mag 13.1 & SB 13.3), yet another lenticular galaxy, was found north-northwest of NGC 7619, and showed as a dim, elongated (2 x 1) glow.
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  2. #22
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    Default Re: 2 or More Galaxies, One Field of View Thread

    Thanks Alan, for the detailed report. Yes, I would like to see all those, and there are quite a few right there for those with enough aperture, or maybe a really dark sky. Getting all of these sounds fun.

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    Default Re: 2 or More Galaxies, One Field of View Thread

    Truth be told, galaxies tend to congregate more than stand alone. Of course, part of the secret of unlocking these groupings of galaxies is aperture and dark skies (and of course experience). Many galaxies appear to stand alone simply because the observer can't reach deep enough to spot the other galaxies lying nearby. I, like yourself, have a strong affinity for multiple galaxies in the field of view. I find it very appealing visually, especially when there are multiple shapes and sizes. One of my goals this winter (work and weather permitting), is to use the 17.5 to drill down behind the open cluster M44 to see the galaxies that lie behind its stars. They won't look like much visually, but, as you well know, with galaxies, its not always about the visual attractiveness as much as it is simply seeing these far away star islands, and contemplating on the time and distance involved in discerning a few photons.

    BTW, you might want to check the November issue of Sky & Telescope. There are a couple of articles in there about observing groups of multiple galaxies.
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    Default Re: 2 or More Galaxies, One Field of View Thread

    Sorry, perhaps I missed that last post. They do tend to be found in groups. I suppose with a larger scope you can see the dimmer ones, making it easier, yet you will have a narrower view, depending on f number, so they'll have to be closer.

    Wow! M44 has galaxies? That would be COOL! Probably out of reach of my humble 4.5 ", but maybe someday.

    Another cool spot that has a galaxy is 1924, about 2° from M42/3. I tried it the other night, but would need some spectacular conditions, as a minimum. But the rest of you, give it a shot. I think it's 12.5, so might be visible in 8-10" depending on conditions.

    Also, found a couple more that one might pick up in the same field. 584 & 596 in Cetus. 600, 615, & 636 are also nearby , but may require a larger scope.

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    Default Re: 2 or More Galaxies, One Field of View Thread

    And of course, the Grus triplet, 7590, 99, and 7582, although they can be difficult from USA.

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    Default Re: 2 or More Galaxies, One Field of View Thread

    Also near cetus: NGC 470 and 474 in Pisces.

    Recently seen in my 10" Flextube with the 11mm ES 82°.
    Really just two small fuzzies but they easily fitted together in the 0.75° fov.

    Check the link below for info and an amazing image of this peculiar galaxy pair.

    Arp 227, a pair of interacting galaxies
    helicon64 and andro-mike-eda like this.
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    Docter Optic Nobilem 8 x 56 B/IF

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    Default Re: 2 or More Galaxies, One Field of View Thread

    Quote Originally Posted by andro-mike-eda View Post
    Wow! M44 has galaxies? That would be COOL! Probably out of reach of my humble 4.5 ", but maybe someday.

    Another cool spot that has a galaxy is 1924, about 2° from M42/3. I tried it the other night, but would need some spectacular conditions, as a minimum. But the rest of you, give it a shot. I think it's 12.5, so might be visible in 8-10" depending on conditions.
    Yes indeed, M44 has several faint galaxies behind it. Look at the discussion linked below, where observer extraordinaire, Steve Gottlieb, posts some of his observing notes for some of them.

    Galaxies behind M44


    Actually there are galaxies in all directions, but of course most of them are so distant and so faint they only show up in images taken by the likes of the HST. I'm sure everyone is familiar with the Hubble Deep Field image and its 2.5 arc minute field brimming with distant galaxies. If they performed that same exercise in any 2.5 min area of the sky, they would find the same thing, except those areas where obscuring material in our own galaxy blocked the light from those distant star islands.

    I haven't tried NGC 1924 as of yet, but I have been working on a list of winter galaxies to pursue. Given that we can have excellent transparency during the winter, and we are looking away from our own galactic core, it can be an excellent time of year to pursue galaxies. Provided one can deal with the temperatures mother nature sends their way.
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    Default Re: 2 or More Galaxies, One Field of View Thread

    While you are looking at interesting winter galaxies, there is a nice grouping of three galaxies in far southeastern Taurus, just above its border with Eridanus. Lying almost a degree NNW of 45 Eridani (mag 4.9), the ellipticals NGC 1587 and 1588, form a close pair. While 1587 at mag 11.7 should be within reach, 1588 at 12.9 might prove more elusive. See if you can pick up these two glows side by side. Also be aware that a few arc minutes to the north of this pair is the spiral NGC 1589, which at mag 11.8 should also be doable.

    Additionally, just east of the pair of ellipticals is a more difficult target, the mag 13.5 lenticular NGC 1608. Interestingly, due to one of the many errors in the NGC/IC catalogs, this is also equatable to NGC 1593 and IC 2077.
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    Default Re: 2 or More Galaxies, One Field of View Thread

    Another pair you may want to try for is in southwestern Triangulum. NGC 672 is a barred spiral with a visual mag of around 10.7 and surface brightness around 13.3 MPSAM, at an angular size of 6.0 x 2.4 mins. In the same field of view is another barred spiral, IC 1727. It puts up a visual mag of about 11.4 and surface brightness around 14.0 MPSAM across its 5.7 x 2.4 min dimensions. They lie about 2° SSW of 3rd mag Alpha Trianguli (Mothallah). See if you can pick them both up.
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    Default Re: 2 or More Galaxies, One Field of View Thread

    Mike, et al. Another grouping you might want to look at is anchored by NGC 936 in Cetus, also known as Darth Vader's Starfighter. It is a barred lenticular that is nearly face-on to us, and has a visual mag of about 10.0 and SB of about 13.0 based on an angular size of 4.7' x 4.1'. In images, its primary feature is a distinct central bar buried inside of a gauzy halo. See if you can pick this one up and how much of its bright central region is revealed. Center on 4th mag Delta Ceti (the bright star just west of M77). Then move southwest about 2° to 5th mag 75 Ceti and turn west for about 1°.

    In the same FOV and between NGC 936 and 75 Ceti are two other galaxies to keep an eye out for. The first is NGC 941, about 12' east NGC 936. It is a spiral of Vmag 12.4 & SB of 13.8 based on a size of 2.6' x 1.9'. Then, about 44' east of NGC 936 keep your eye out for NGC 955. It is a spiral of Vmag 12.3 & SB of 13.3 based on a size of 2.8' x 0.7'. These all belong to the Cetus-Aries galaxy cloud. Good luck!
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