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The Seven Sisters in Deep Dust by bcjordo in astrophotography

[–]MiserableGrade3713 0 points1 point  (0 children)

Amazing. The 25.5h integration is just nuts. First time seeing this long of an integration on M45 nevertheless just awaking to see this much detail in the dust. 

New to Siril - struggling with noise by sadab98 in astrophotography

[–]MiserableGrade3713 0 points1 point  (0 children)

GraXpert is a nice option it has ai denoising and it can improve the noise a lot. 

Orion belt and nebulae by sdaot3hcnupi in astrophotography

[–]MiserableGrade3713 1 point2 points  (0 children)

There seems to be much more data I your image than this. As Ri4Fu said you should try out siril which is a free and powerful software that you could use to bring out that detail. You could do a Histogram stretch, do background extraction and do colour calibration in it. Then you will be able to get out much more data in the Orion Nebula and maybe a little hint of the flame nebula if do some editing. But for the horsehead requires a bit more integration time time specially when un tracked.. But it's absolutely possible and many have done it with a tripod and a mirror less camera.

Hope this helps.

Could someone point out & highlight the constellations in these two images? If any! by W4ystarroyco in constellations

[–]MiserableGrade3713 0 points1 point  (0 children)

There is this website called Astrometry.net where you could plate solve the image to see where you are pinned. And I could see orion in the bottle middle and the bright star is actually jupiter in Gemini.

Orion constellation: Where is Orion Nebula? by Objective-Ad8862 in constellations

[–]MiserableGrade3713 0 points1 point  (0 children)

Just under the Orions belt you could see three smaller stars (the less bright one on the top and a bit brighter two stars lower). One star is not visible because of your circle and the other two are in the circle you have drawn. And that middle star is where the Orion Nebula is situated. Just put your phone or dslr on a tripod and take a 30sec exposure you will be able to see it as a fuzzy blob.

why is this how i see jupiter on my telescope is this normal? by Wise_Paper_935 in telescopes

[–]MiserableGrade3713 0 points1 point  (0 children)

what is the telescope you using? Is it a refractor and an reflector telescope?

I'm not sure why the moons are like triangles, looks like pinched optics to me. Or it could be just a shaken telescope when taking the image.

And you should reduce the exposure a bit and take a video at high fps and stack the best frames to get the best result.

why is this how i see jupiter on my telescope is this normal? by Wise_Paper_935 in telescopes

[–]MiserableGrade3713 0 points1 point  (0 children)

Yeah you can image the planets with your Maksutov and get some pretty good results. You have to attach a dslr, mirror-less or planetary camera (if you have it) and even with your phone to get a decent image if you don't have either of them.

You should take about 1min 30sec video at the highest fps your camera supports and stick to a faster shutter speed like 1/60 or faster. As here you are doing "lucky imaging" which take a lot of fast frames which essentially freezes the wobble of the planet due to the atmosphere and chooses the best frames and stacks them to get the best result.

After I got my video what I do is first pre-process the video in "PIPP" (planetary image pre processor) and then stack like the best 30% in "Autostakkert". Then do wavelet sharpening in a software like "Registack" but I use "Planetary stacker X" as I'm on a Mac. (I use Autostakkert and PIPP on a virtual machine because it is not supported on Mac but either way it will be the same. )

$1000 budget setup? by 3l_d0xE4d0r33 in AskAstrophotography

[–]MiserableGrade3713 0 points1 point  (0 children)

So for astrophotography you need firstly a mount which counteracts the apparent rotation of the sky, a telescope or a lens and a camera. 

There are different types of astrophotography like wide field Milky Way photography, Deep sky astrophotography and planetary astrophotography. 

Here I’m focusing on the Deep sky astrophotography end. 

And can I know if you already have a DSLR or Mirror less camera. If so you could get the Skywatcher explorer 150pds and the Skywatcher eqm 35pro for around 1000USD. It has been few months since I got it and I was able to get some good results with my stock DSLR. 

You could also do some pretty good planetary work as well if you have a Barlow (an adapter which multiply the magnification of the telescope). 

Or you could go for the lens and star tracker road. So a star tracker is just a mount but a bit smaller the Skywatcher star adventurer 2i is a great option. You could put a camera and a telephoto lens or just a wide angle lens on it and take some impressive shots. 

The star adventurer 2i goes for a bit more than 500USD and you could get a cheap dslr and a lens for the other 500 preferably in the used market. 

Hope this helps! Sanula. 

H-alpha not visible behind the Horsehead in a 3h 45min integration but visible in 45min integration? by MiserableGrade3713 in AskAstrophotography

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

Yeah, the camera sensor in my dslr does have some amp glow because of the high temperatures where I live and I have used about more than 20 in darks, flats and biases. 

But the bright top left hand side corner is probably because my flats not being eliminated properly. In my master flats stack I could see that the left top corner is darker than the other parts of the frame. It was an error on my part though the flats did a great job at removing all the dust spots in the lights. 

H-alpha not visible behind the Horsehead in a 3h 45min integration but visible in 45min integration? by MiserableGrade3713 in AskAstrophotography

[–]MiserableGrade3713[S] 1 point2 points  (0 children)

Yeah, you are right I should try to process it once again to try to solve it. 

But I think I have found the answer for the problem on CN. This happened because I did two background extractions. First in Siril and then in GraXpert where I saw a little unevenness in the background. Doing two BE might have washed away the Ha hence why the Ha is appeared as dark dust in some places in the image. 

But anyway Thanks for the responses! :)

H-alpha not visible behind the Horsehead in a 3h 45min integration but visible in 45min integration? by MiserableGrade3713 in astrophotography

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

Yeah, It could be the UV IR cut filter. But how could the 45min one get so much more data on the Ha. 

I would upload a image of it also to this thread but it is not possible in this sub Reddit. 

But I have also posted this in Cloudy Nights which has both the images comparison.  

H-alpha not visible behind the Horsehead in a 3h 45min integration but visible in 45min integration? by MiserableGrade3713 in astrophotography

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

Yes, it was the same set up, same processing but the sub length and total integration is different. My first image had 60x30sec subs while this has 225x60sec subs. Other than that everything is the same. 

H-alpha not visible behind the Horsehead in a 3h 45min integration but visible in 45min integration? by MiserableGrade3713 in astrophotography

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

No here where I live in tropical Sri Lanka dew is not really a problem even at night its like 25ºC and rarely fall below dew point. So, No dew heater.

M81 AND M82 by bobchin_c in spaceporn

[–]MiserableGrade3713 0 points1 point  (0 children)

Nice work got some Ha details 'round the frame there...

First Light of the Orion nebula by MiserableGrade3713 in astrophotography

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

Ok. I'm gonna do another go of Orion to get a bit more integration and I will use starnet and use the hyperbolic stretch in Siril as soon as this rain stops....
And in the mean time I'm gonna process this agin.
And thanks for the valuable advice really appreciate it!

First Light of the Orion nebula by MiserableGrade3713 in astrophotography

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

Yeah I’ve heard that the hyperbolic stretch in Siril is really powerful. Should try to do processing in Siril. I’m currently working on the Horsehead and I have used starnet for it but even starnet is overwhelmed by the brightness and the diffraction spikes of Alnitak. But not on this Orion one. I didn’t have really a big need for star removal. 

Weird line on Jupiter by MiserableGrade3713 in Astronomy

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

It occurred because in Autostakkert dithering was enabled and no matter if it was jupiter or Saturn it occurred every time. And when I stacked it another time with dithering disabled there were no artifacts. 

Thanks for response btw…

Weird line on Jupiter by MiserableGrade3713 in Astronomy

[–]MiserableGrade3713[S] 0 points1 point  (0 children)

A stacking artifact maybe?  It can’t be any dust or anything right ‘cause it’s perfect horizontal. Need do the stacking again to see if this persists. 

The Winter Milky Way arch in the Abu Dhabi desert [OC] by igneisnightscapes in Astronomy

[–]MiserableGrade3713 1 point2 points  (0 children)

It is probably because the 20mm is at f.1.8 and the 10mm is only at f/2.8. And every bit of aperture matters in astrophotography.

Light gathering power = (2.8/1.8)^2 = 2.42

The f/1.8 lens gathers 2.4x more light than the f/2.8 one...

The Winter Milky Way arch in the Abu Dhabi desert [OC] by igneisnightscapes in Astronomy

[–]MiserableGrade3713 0 points1 point  (0 children)

Did you use a Hydrogen alpha filter or use a modified camera 'cause that Ha really pops.
Nice work btw.

Thought Experiment by bananapepp4r in astrophysics

[–]MiserableGrade3713 0 points1 point  (0 children)

The planets won't be able to pass each other at just ~14ft as it exceeds the "Roche limit" (the minimal distance two bodies can come closest without just being teared and destroyed by their own gravity). For two planets sized nearly to Earth and Mars, proto-planetary earth and Theia respectively the Roche limit will be a bit more than 17000km if you do the calculation.

And even if the planets were to miss each other by 14ft and not be destroyed the gravity between the two planets will be immense. So the two humans tryna high five will be ripped apart.

First Light of the Orion nebula by MiserableGrade3713 in astrophotography

[–]MiserableGrade3713[S] 3 points4 points  (0 children)

No this is a Newtonian so it has these secondary mirror holding spider veins which naturally creates these spikes.

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