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Thread: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

  1. #1
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    Default "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies



    Hello all,

    it happens sometimes, that some nice deep sky objects in the proximity of the famous Messiers may become neglected, even if they are within the reach of the small telescopes. We have already seen an example: Turn left at M13: the amazing galaxy NGC 6207

    The surprisingly clear skies on the 3rd July have been a good reason to put the NGC 4618 and the NGC 5198 on the observing list for my 6" achromatic F/5 SkyWatcher.

    The NGC 4618 (Arp23) is about 1.5° to the west of the bright M94 galaxy in Canes Venatici, my star hopping strategy is shown in the attached sky chart. The NGC 4618 is a Magellanic spiral, belonging to the Virgo Super Cluster. The galaxy has a peculiar form with its spiral arm pointing towards the faint companion NGC 4625, NGC 4618 - Wikipedia, the free encyclopedia
    With its total brightness of 10.9mag it offers a comfortable surface brightness (13.6) over its area of 4.2'x3.4'.
    The galaxy has revealed a large faint cotton ball without structures or condensations at the magnifications of 75x and 107x. The yellow filters Wratten #8 and #12 have helped to reduce the sky brightening, as typical for the season around the solstice.
    The NGC 4618 is listed among the 200 brightest galaxies. Even if this galaxy is a quite amazing example of a Magellanic peculiar spiral Arp's galaxy in the northern skies, it has not been included in the popular lists, like Caldwell, RASC, SAC, and others.

    The M94 has revealed at the magnifications of 75x, 107x and 187x a very small bright core, surrounded by an extended halo. This has been my first light with the recently acquired UWA/UWAN f=4mm (82°) eyepiece from the Teleskop Service, offering the magnification of 187x at the exit pupil of 0.8mm.

    The NGC 5198 is an elliptical galaxy, about 1/2° south of the famous Whirlpool Galaxy M51, and it can be often identified on the wide field astrophotos. This galaxy is still fairly bright (11.9mag), with the surface brightness of 13.3 over its oval of 2.1'x1.8'. The attached sky chart shows my star hopping strategy.
    The NGC 5198 turned out to be more difficult, needing averted vision at the magnifications of 75x and 107x. The yellow Wratten filter #12 has been quite helpful to increase the contrast. Under the better observing conditions (less sky background glow), this galaxy should be easily seen with direct vision through a 6" refractor.

    The Whirlpool Galaxy M51 has revealed at the magnifications of 30x and larger the both cores, and at the magnifications of 75x and 107x also a hint of the bridge extending from the M51 towards the NGC5195 companion. I have not spent more time with the M51, as the next object, the Tulip Nebula in Cygnus has been on the list.

    Date and time: 3rd July, 2014, 23:00 - 24:00
    Location: backyard
    Observing conditions: clear skies with some bluish brightening, the Double Cluster and the Alpha Persei Moving Group very faint with unaided eyes at 24:00
    Telescope: 6" SkyWatcher achromatic refractor, F=750mm
    Eyepieces: Pentax XW 7mm and 10mm, UWA/UWAN 4mm
    Filters: yellow Wratten #8 and #12 to suppress the bluish sky background

    Clear skies and happy hunting,

    JG
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    andro-mike-eda (07-05-2014),bigjack (07-04-2014),helicon64 (07-04-2014),stargazer55 (07-12-2014),Voyager3 (07-05-2014)

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    Default Re: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

    Glad you got some clear skies I enjoyed your report. I looked at 4618 as it is on the Herschel 400, but I hope I can get 5198 as it is getting lower. If not this year, maybe next.

    Let us know about the Tulip Nebula.
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    Default Re: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

    I also have seen NGC 4618 when searching for M94, it was fairly impressive at the eyepiece. Thanks for the report JG and Happy Hunting!
    Michael
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    Default Re: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

    Very interesting. You are getting very nice observing sessions lately.
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    Default Re: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

    Hello Mike, hello Michael,

    thanks for the confirming observations of the fainter galaxies in the proximity to M94 and M51,

    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: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

    Quote Originally Posted by andro-mike-eda View Post
    ...

    Let us know about the Tulip Nebula.
    Hello Mike,

    the Tulip Nebula report is here The Tulip Nebula Sh2-101 in Cygnus through the 6" refractor

    Wishing you happy hunting, as your young eyes nail down any challenge in the night skies,

    JG
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    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: "Turn left at M94 and M51" to find the NGC 4618 and NGC 5198 galaxies

    Quote Originally Posted by j.gardavsky View Post

    Wishing you happy hunting, as your young eyes nail down any challenge in the night skies,

    JG
    Excellent, it even rhymes!
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