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FORUMS Photo Sharing & Discussion Astronomy & Celestial 
Thread started 11 Jul 2016 (Monday) 12:09
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tobahl
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Jul 11, 2016 12:09 |  #1

I don't know how you all do it, but all the photos here are so nice :)

My first attempt. I realize it's not optimal. Shooting with the 70D and Sigma 30Art. This was from my balcony so there's a bit of light pollution too.

Anyway, I can't even begin to identify what's what, anyone here have a clue? It should be taken to the west and I'm based in Stockholm/Sweden. Shot last November.

IMAGE: https://c3.staticflickr.com/9/8577/27629791274_36c6b38ce8_b.jpg
IMAGE LINK: https://flic.kr/p/J6xU​kC  (external link) edited-IMG_6774 (external link) by Tobias Ahlander (external link), on Flickr

Thanks,
Tobias

Canon 70D | 10-18 IS STM | 24 STM | 35 IS USM | 100 f/2.8 L USM Macro | 70-200 f/4 L USM
E-M10 Mark II | G80 | GX800 | Σ60 f/2.8A | P12-60 f/3.5-5.6 | P12-32 f/3.5-5.6 | O40-150 f/4-5.6 | O15 f/8
C&C always welcome

  
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junglialoh
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Jul 13, 2016 06:52 |  #2

good job for the first work. Great expected potential talent.




  
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TCampbell
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Jul 13, 2016 14:11 |  #3

I believe you captured Cygnus (the Swan) based on entering in parameters for a 30mm focal length and a Canon APS-C sensor. Your image also contains most of Lyra (the Harp).

The brighter star near the top middle of the image is Deneb. The even brighter star at the extreme right edge of the image is Vega.

Near the bottom of the image - right of the center is the star Albireo... it is actually two stars (Albireo is one of the more beautiful double-stars). When observed through a telescope, one star in the pair is very distinctly "blue" and the other is very distinctly "gold" so they provide a very beautiful (and obvious) color contrast when viewed at magnification through a telescope. In your image Albireo appears slightly reddish.

Since you don't have a modified DSLR sensor (modified for astrophotography by removing the UV/IR filter and replacing it with a filter that doesn't block Hα wavelengths so aggressively) the "North American" nebula is just left of Deneb. Your image also contains the Ring Nebula (a planetary nebula) located in Lyra, but again, the this is a very tiny object that normally requires a very long focal length to notice it (and having a modified astrophotography camera really helps.)

Incidentally, you can use something called the Blind Astronomy Solver (astronomy.net) to do "plate solving" on images and find out what part of the sky is in the image. I did not use plate solving... I looked at your image date & time and the fact that you were looking west (and into the band of the Milky Way). I set my planetarium software (Starry Night Pro Plus 7) to the same date & time, ran it to the "west", entered in a 30mm lens and Canon sensor to add in the "field of view" rectangle, and noticed that it exactly fit this section of sky.

You can upload images to the Blind Astronomy Solver (Astronometry.net) at this website: http://nova.astrometry​.net (external link)

They also have a Flickr "group" and if you share the image to that group, the software automatically plate-solves your image and then responds back (it's a robot post) to your image with the coordinates for your image and some other data about what's located there.




  
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Celestron
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Jul 13, 2016 15:50 as a reply to  @ TCampbell's post |  #4

Help me out TC, where are you seeing Lyra ?? The summer triangle is just now appearing over Texas high up but not zenith til late late late . He said this was taken in the West so I can picture the Triangle low in West from here and I could see Lyra fairly well . But in this image I cannot make out Lyra .




  
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TCampbell
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Jul 13, 2016 18:16 |  #5

Celestron wrote in post #18066122 (external link)
Help me out TC, where are you seeing Lyra ?? The summer triangle is just now appearing over Texas high up but not zenith til late late late . He said this was taken in the West so I can picture the Triangle low in West from here and I could see Lyra fairly well . But in this image I cannot make out Lyra .

If you follow the link to the Flickr website you can see the shooting info... the image was taken last November.

I hate to annotate someone else's image without their permission, but I could draw the constellations lines to make it easier to see.




  
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Davenn
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Jul 13, 2016 19:28 |  #6

Celestron wrote in post #18066122 (external link)
Help me out TC, where are you seeing Lyra ?? The summer triangle is just now appearing over Texas high up but not zenith til late late late . He said this was taken in the West so I can picture the Triangle low in West from here and I could see Lyra fairly well . But in this image I cannot make out Lyra .

from Stellarium, close to the same FOV .....

cheers
Dave

IMAGE: https://photography-on-the.net/forum/images/hostedphotos_lq/2016/07/2/LQ_803215.jpg
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A picture is worth 1000 words ;)
Canon 5D3, 6D, 700D, a bunch of lenses and other bits, ohhh and some Pentax stuff ;)

  
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Celestron
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Jul 13, 2016 22:27 as a reply to  @ Davenn's post |  #7

OK , thanks . I was at work today and I'm not allowed any planetarium programs on my computer so without my home computer I just could not make it out right off .




  
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Davenn
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Jul 14, 2016 05:51 |  #8

Celestron wrote in post #18066346 (external link)
OK , thanks . I was at work today and I'm not allowed any planetarium programs on my computer so without my home computer I just could not make it out right off .


well that sux :-(


Dave


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TCampbell
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Jul 14, 2016 08:23 as a reply to  @ Davenn's post |  #9

That was a good idea (I suppose I could have done that with my planetarium software). Anyway, in Tobias' image the constellation is rotated just slightly (counterclockwise) and the camera angle is just slightly higher. It's just enough to cut the Dumbbell nebula out of the image, but the North America nebula is in his image (though we can't see it due to exposure duration and the camera isn't sensitive enough to Ha.)




  
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Celestron
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Jul 14, 2016 08:50 |  #10

Yeah it threw me off cause I was looking for Altair . Lyra is a favorite cause of the ring neb M57 being there and when some get a deep enough exposure there is that little spiral IC 1296 close by usually in the same image . Wish my scope was strong enough and I was in a dark enough place to see that in the EP !




  
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tobahl
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Jul 15, 2016 04:11 |  #11

TCampbell wrote in post #18066201 (external link)
I hate to annotate someone else's image without their permission, but I could draw the constellations lines to make it easier to see.

I don't mind, if you can draw the constellations on my photo that would be great :)

I'm just getting in to this and all tips and help with indentification is welcome :)

Cheers!


Canon 70D | 10-18 IS STM | 24 STM | 35 IS USM | 100 f/2.8 L USM Macro | 70-200 f/4 L USM
E-M10 Mark II | G80 | GX800 | Σ60 f/2.8A | P12-60 f/3.5-5.6 | P12-32 f/3.5-5.6 | O40-150 f/4-5.6 | O15 f/8
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Crooks
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Jul 15, 2016 13:23 |  #12

Great shot!




  
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TCampbell
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Jul 15, 2016 15:42 |  #13

tobahl wrote in post #18067464 (external link)
I don't mind, if you can draw the constellations on my photo that would be great :)

I'm just getting in to this and all tips and help with indentification is welcome :)

Cheers!

Here' you go!

IMAGE: https://photography-on-the.net/forum/images/hostedphotos_lq/2016/07/3/LQ_803467.jpg
Image hosted by forum (803467) © TCampbell [SHARE LINK]
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I've labeled the two constellations

- Cygnus (the Swan) flying with wings outstretched and head down (tail is up). The swan flies on the path of the Milky Way.

- Lyra (the Harp) The four stars which form a parallelogram (body) and a line going to Vega (the neck of the harp). The end of the neck forms a "T" shape but only one half is visible (the other star is cropped out of your image.)

Within Lyra is the Ring Nebula (aka Messier 57 or M57) which is a planetary nebula (it's what happens to a star about the size of our sun when it dies).

Within Cygnus is Cygnus X-1 which is one of the first black holes discovered (it was initially discovered as an X-Ray source and upon inspection it was realized that another star is in orbit around "nothing" ... at a distance of only about .2 astronomical units (an astronomical unit is the distance from the Sun to the Earth ... so this star orbits it's black hole at a distance even closer than Mercury orbits our Sun. Mercury orbits the Sun at a distance of .39 AU... so this star orbits the black hole at a distance about half that of Mercury orbiting our Sun.)

There's also the North American nebula (up near Deneb) -- so named because it looks a bit like a map of North America. The nebula glows in Hydrogen alpha light -- a typical camera isn't particularly sensitive to this light and it would have required a much longer exposure for it to show up.



  
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tobahl
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Jul 16, 2016 07:10 |  #14

Thanks for all kind comments and help :)

Will go through this and check some maps

Cheers!


Canon 70D | 10-18 IS STM | 24 STM | 35 IS USM | 100 f/2.8 L USM Macro | 70-200 f/4 L USM
E-M10 Mark II | G80 | GX800 | Σ60 f/2.8A | P12-60 f/3.5-5.6 | P12-32 f/3.5-5.6 | O40-150 f/4-5.6 | O15 f/8
C&C always welcome

  
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Davenn
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Jul 18, 2016 17:10 |  #15

TCampbell wrote in post #18068017 (external link)
Here' you go!

...............

3

maybe you didn't see my ID map further up the page ?? ;-)a ;-)a


A picture is worth 1000 words ;)
Canon 5D3, 6D, 700D, a bunch of lenses and other bits, ohhh and some Pentax stuff ;)

  
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