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Thread: "The Frog Spiralism" in the Triangulum Galaxy M33

  1. #1
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    Default "The Frog Spiralism" in the Triangulum Galaxy M33



    Hello all,

    it is quite a fun to look at the eyepiece for the spiral arms in the bright galaxies, and the M33 is one of the easiest targets even for the small telescopes, like my 6" refractor.

    The spiral arms south off the M33 core reveal a curved structure, I have nicknamed "The Frog" according to their appearance. In analogy to the asterisms, I have decided to call it a spiralism.

    The illustrating picture is here,

    The Frog Spiralism in M33.jpg

    "The Frog" is marked by the star birth regions IC 137, IC 410, IC 139,
    and by the stars associations A48 and A14.

    First time observed: 29th and 30th September 2011
    Location: Backyard
    Telescope: 6" F/5 achromatic refractor
    Eyepieces: Pentax XF 12mm and 8.5mm
    Filters: without, and with Astronomik UHC
    Observing conditions: M31 and the Double cluster easy with unaided eyes

    (Later observations have been through the Pentax XW 10mm.)

    Enjoy the spiral structure of the Triangulum Galaxy,

    JG
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plössls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    Quote Originally Posted by j.gardavsky View Post
    I have decided to call it a spiralism.
    Love it!
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    Dave Hunt

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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    Thanks JG!

    I have oberved NGC 604. Hopefully a good transparent evening will present itself too so that I may claim The Frog!
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    Bryan

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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    I have decided to call it a spiralism
    If you had not said that I would have thought it was a real term Well it is a 'real' term but... doh... never mind.

    Cool thing to try to see. Thanks for the post.
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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    Quote Originally Posted by j.gardavsky View Post
    Hello all,

    it is quite a fun to look at the eyepiece for the spiral arms in the bright galaxies, and the M33 is one of the easiest targets even for the small telescopes, like my 6" refractor.

    The spiral arms south off the M33 core reveal a curved structure, I have nicknamed "The Frog" according to their appearance. In analogy to the asterisms, I have decided to call it a spiralism.

    The illustrating picture is here,

    The Frog Spiralism in M33.jpg

    "The Frog" is marked by the star birth regions IC 137, IC 410, IC 139,
    and by the stars associations A48 and A14.

    First time observed: 29th and 30th September 2011
    Location: Backyard
    Telescope: 6" F/5 achromatic refractor
    Eyepieces: Pentax XF 12mm and 8.5mm
    Filters: without, and with Astronomik UHC
    Observing conditions: M31 and the Double cluster easy with unaided eyes

    (Later observations have been through the Pentax XW 10mm.)

    Enjoy the spiral structure of the Triangulum Galaxy,

    JG
    I always love to read your post. I've just gotta stop reading them in the daylight. I'll be pointing my telescope to M33 very soon. I happen to like frogs. I more accurately love to hear them sing in the early evenings. I live on a river, so I hear it a lot.
    j.gardavsky likes this.

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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    Cool post, JG.

    Now I gotta find the "spiralism"... nice!

    Thanks much.

    Clear, Dark Skies
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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    I've seen NGC 604 as well, fairly easy in the 18". But I have to check out more of the star-birthing regions. Nice report JG!
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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    I can spot triangulum with my binoculars and look at it on clear, transparent evenings and find it enjoyable. It is a tough one to locate sometimes, really have to avert your vision to pick it up.

    Question: would there be a good filter to add to the eyepiece to bring out more contrast in this galaxy?

    Thank for your input.
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    Default Re: "The Frog Spiralism" in the Triangulum Galaxy M33

    Hello Cleary,

    under my suburban-to-country skies, the medium pass-band Astronomik UHC filter does the job on the M33.
    Best,

    JG
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