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Thread: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

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    Default 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84



    Have you ever heard of the Henize's (Karl G. Henize, 1967) planetary nebulae?
    Here are two Henize's jewels, and one Sharpless' diffuse nebula as a bonus.


    Hello hunters of the DSOs,

    This is a selection of 3 less known deep sky objects in Sagitta for the August - Sptember season. These all three objects are well suited for the small telescopes under the suburban-to-country skies.

    The both Henize planetary nebulae are remarkably bright and easy to find in the area of skies south off the Coathanger Cluster (Cr399) in Sagitta. Moreover, they stand out fairly well in the field of the surrounding stars.

    Hen 2-430 (PK 051+3.1, PNG 051.0+03.0): brightness 11m8, size 5",
    at 19h14m04s +17°31'33"
    This planetary nebula is about 1° south-east off a dense group of 5 bright stars at 19h12m +18°.
    The nebula responds well to both the OIII and H-Beta filters, and it is also visible through the UHC filter. At the magnification of 75x, the nebula is still star-like.

    Hen 2-441 (Me 1-1, PK 052-02 2, PNG 052.5-02.9): brightness 11m8, size 8",
    at 19h39m10s +15°56'48"
    This planetary ring nebula is about 0.7° south off the Herschel's double star H84 (6m5/8m9, 28.2" sep.,302° PA). The H84 makes a wide pair with Epsilon Sagittae.
    The nebula responds well to the OIII filter, and even slightly better to the H-Beta filter, I'd say. It is also comfortably visible through the UHC filter. A magnification of 107x (exit pupil 1.4mm) reveals a smallish disc.
    The astrophysics of this 'peculiar' planetary nebula can be found here, High-resolution spectroscopic observations of the peculiar planetary nebula Me 1-1 - ResearchGate

    Sh2-84 diffuse emission nebula: at 18h49m04s +18°24'01"
    The Sh2-84 Sharpless' nebula is located less than 0.4° south-east off the bright Delta Sagittae. The nebula responds well to the OIII and H-Beta filters, revealing a faint diffuse glowing arc between a wide pair of stars. The highest brightness of the faint diffuse glow points towards south. It can be best seen at middle magnifications and mid-range exit pupils, like 44x and exit pupil of 3.4mm.
    The nebula is suspected to be a remnant of a large ring-shaped nebula, The Sharpless Catalog

    Last time observed:
    Date and time: 11th September, 2015, 22:00 - 23:00 local time
    Place: backyard
    Observing conditions: The Double Cluster and M31 seen with unaided eyes
    Telescope: 6" F/5 Sky-Watcher achromatic refractor
    Eyepieces: Antares W70 f=25mm for navigation, Pentax XW f=10mm and 7mm, Zeiss (23x/30x B WW) f=17.1mm
    Filters: UHC and H-Beta Astronomik, OIII 8.5nm Baader, (470nm blue TS filter for reference)

    Enjoy the astrophysics at the eyepiece!

    Clear skies,

    JG
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Very nice JG! Thank you for posting these. Of course these are going on my ever growing list.

    Hope to have a go at these tonight.
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Will put these 3 on the top of my observing "to-see" list, thanks again JG! Been observing more planetary nebulae lately (and using my filters more), thanks to you.

    Terry
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Thanks JG.
    Since I've been crying in my pretzels - cloudy and rain - I have plenty time to make a new list.
    These will be on the top. Hopefully the skies are decent tomorrow.
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Thanks JG! Will definitely have to add these to my "to see" list.

    Great information that you've given us on these 3 objects.
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Hi JG. A very nice selection of objects observed using the 6" refractor. I am aware of Sh2-84 (Sharpless), but the Henize objects are quite new to me. Thanks for a well written and documented report JG, and the best of regards.
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Thank you sir for this reporting.
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    the more i read the more im thinking i need a list, then im thinking i need a bigger scope , then i read gain I KNOW I NEED A BIGGER SCOPE , then reality check i need lots of practise 1st so back to my 5" and reading about all your wonder viewing experiences

    thanks to all for sharing and thanks for this JG
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Remarkable job tracking down these planetaries JG. Now I have more to add to my list. I still haven't completed your earlier list of planetaries, though I have printed out and saved the page. It serves as an inspiration to test the equipment (my scope and my eyes).
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    Default Re: 2 Henize, and 1 Sharpless: Hen 2-430, Hen 2-441 (Me 1-1), and Sh2-84

    Hello all,

    in fact, I set up lists for specific typec of targets, like the planetary nebulae, diffuse emission nebulae, and similar, and then work with a chosen equipment degree by degree through the constellations which are likely to offer the best view.
    Then, I am happy when I fix 2 to 4 such 'new' objects out of lets say 20 in one session, the rest of the session is then just revisiting the old friends.

    It is a hobby, and I am looking for to have my fun.

    Best,

    JG
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