Deep Sky Objects and Their Observation

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Deep Sky Objects and Their Observation

#1

Post by kt4hx » Thu Oct 10, 2019 12:26 am

Deep Sky Objects and Their Observation
by kt4hx

To begin this article I will pose a couple of questions. Have you ever observed deep sky objects (DSOs) and perhaps been at a loss for words as to how you can adequately describe its appearance in your notes? Similarly, have you seen a feature that perhaps you didn’t fully comprehend its true nature?...
Read more...
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
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#2

Post by JayTee » Thu Oct 10, 2019 12:57 am

Excellent article Alan. Thank you for writing this up.

Cheers,
JT
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#3

Post by Bigzmey » Thu Oct 10, 2019 1:03 am

Very nice article Alan! Thanks for taken the time to put it together.

I would like to encourage everyone who observe to take notes or sketch what you see. Not just for sharing it with others (which is very rewarding already) but also because describing what you see makes you focus on the details and see more as a result.

Granted, many targets particular in small scopes will be just faint fuzzies, but even then you can describe the shape, size and relative brightness. In brighter targets with some practice you can pick quite a few details. For instance go on the hunt of star forming H II regions in the spiral arms of the Triangulum Galaxy.
Scopes: Stellarvue: SV102 ED F7; Celestron: 9.25" EdgeHD F10, 8" SCT F10, 6" SCT F10, Omni XLT 150R Achro F5, Onyx 80ED F6.3; Meade: 80ST Achro F5.
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#4

Post by kt4hx » Thu Oct 10, 2019 1:47 am

JayTee wrote:
Thu Oct 10, 2019 12:57 am
Excellent article Alan. Thank you for writing this up.

Cheers,
JT
Thanks JT. I hope that it helps some folks during their observations.
Bigzmey wrote:
Thu Oct 10, 2019 1:03 am
Very nice article Alan! Thanks for taken the time to put it together.

I would like to encourage everyone who observe to take notes or sketch what you see. Not just for sharing it with others (which is very rewarding already) but also because describing what you see makes you focus on the details and see more as a result.

Granted, many targets particular in small scopes will be just faint fuzzies, but even then you can describe the shape, size and relative brightness. In brighter targets with some practice you can pick quite a few details. For instance go on the hunt of star forming H II regions in the spiral arms of the Triangulum Galaxy.
Thank you Andrey. I am glad you brought up the subject of keeping a log. I can relate to this issue very closely. For a long, long time I failed to do so. Only later in life did I see the true error of my ways. While I do have some memory of observations made way back, a good part of that has been lost to the ravages of aging and memory loss. At the time I simply did not seem to grasp its importance. Which when I think about it makes no sense. Since I was involved in shortwave radio listening and eventually amateur radio, in which I did keep logs of my receptions/contacts, that same mindset simply did not extend to astronomy.

Needless to say I deeply regret not keeping a record to which I could refer back, knowing what I observed and how I saw objects back then in various scopes. I have had to re-observe a lot of stuff subsequently when I did finally begin keeping a record. Not that its a bad thing to go back and revisit, but I feel I lost some of myself by not keeping a record from my earliest activities. So I too implore everyone to keep a record of some sort. It doesn't have to be exhaustive, but at least know where you've been and what you've observed.
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
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"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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#5

Post by 10538 » Thu Oct 10, 2019 3:37 am

Excellent article Alan! Thanks for your time and effort in sharing this valuable information with us.
Ed
Scopes: Orion XX14g 14” Dob w/MoonLite focuser. Meade LX200 Classic 10”w/AudioStar and MoonLite focuser, Criterion RV6, Orion ST80A w/2” GSO micro focuser. Eyepieces: ES 5.5mm 100*, 6.7mm 82*, 11mm 82*, 14mm 100*, 18mm 82*, 20mm 100*, Meade 9mm XWA 100*, 24mm UWA 82*, 56mm 50*, TV Delos 6 & 8mm, Panoptic 24, 27 & 35mm, 17mm Nagler, Powermate 2X, Baader 6mm Ortho, Paracorr II. MISC: Orion Skyview Pro Mount, Skymaster 15x70, 20x70, 25x100 Binos, HoTech Collimator, Kendrick Dew System, Orion G3, Telrads, Catsperch Obs. Chair.
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#6

Post by kt4hx » Thu Oct 10, 2019 3:44 am

10538 wrote:
Thu Oct 10, 2019 3:37 am
Excellent article Alan! Thanks for your time and effort in sharing this valuable information with us.
Thank you Ed. I appreciate you taking the time to read my submission and commenting.
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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#7

Post by Peter802 » Thu Oct 10, 2019 8:36 am

Alan.
A great and informative article.
Thank you for publishing it.
Clear Skies.
Regards,

Peter
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#8

Post by kt4hx » Thu Oct 10, 2019 8:39 am

Peter802 wrote:
Thu Oct 10, 2019 8:36 am
Alan.
A great and informative article.
Thank you for publishing it.
Thank you Peter. Glad you enjoyed it.
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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#9

Post by pakarinen » Thu Oct 10, 2019 1:09 pm

kt4hx wrote:
Thu Oct 10, 2019 1:47 am
Needless to say I deeply regret not keeping a record to which I could refer back, knowing what I observed and how I saw objects back then in various scopes. I have had to re-observe a lot of stuff subsequently when I did finally begin keeping a record. Not that its a bad thing to go back and revisit, but I feel I lost some of myself by not keeping a record from my earliest activities. So I too implore everyone to keep a record of some sort. [...]


Since I got back into the hobby a couple of years ago, I've been keeping an observation log. Most of my early notes are just lists of what I was able to see with very few details since I didn't want to drag a notebook, pens, red light, etc. scopeside.

More recently I discovered the utility of the Voice Memos app on my phone. Since I use Sky Safari, I have my phone out anyway and it's easy to transcribe detailed voice notes into my log, sometimes many days after the observing session. I'm vaguely aware that SS has logging capabilities of some sort, but I prefer a written record since things can get lost on upgrades and such. FWIW.
If you don't understand your noise, you cannot reliably extract a meaningful signal.
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#10

Post by Don Quixote » Thu Oct 10, 2019 2:53 pm

Ourstanding Alan!
Thank you for this wonderful resource.
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#11

Post by helicon » Thu Oct 10, 2019 6:58 pm

Wonderful article Alan - thanks for posting it!
-Michael
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#12

Post by kt4hx » Thu Oct 10, 2019 10:47 pm

pakarinen wrote:
Thu Oct 10, 2019 1:09 pm

Since I got back into the hobby a couple of years ago, I've been keeping an observation log. Most of my early notes are just lists of what I was able to see with very few details since I didn't want to drag a notebook, pens, red light, etc. scopeside.

More recently I discovered the utility of the Voice Memos app on my phone. Since I use Sky Safari, I have my phone out anyway and it's easy to transcribe detailed voice notes into my log, sometimes many days after the observing session. I'm vaguely aware that SS has logging capabilities of some sort, but I prefer a written record since things can get lost on upgrades and such. FWIW.
I know many folks use a recorder, or type in their notes on a laptop or tablet in the field, or make written notes at the scope. Whatever way one chooses, the main thing is to keep a record. Had I the foresight to make even a simple list of all the things I observed decades ago, that would have been beneficial. Thanks for your input. :)
Don Quixote wrote:
Thu Oct 10, 2019 2:53 pm
Ourstanding Alan!
Thank you for this wonderful resource.
Thanks Mark, and I truly hope you are able to apply some of the things I mentioned to your observing. :)

helicon wrote:
Thu Oct 10, 2019 6:58 pm
Wonderful article Alan - thanks for posting it!
Thanks Michael. I know in some cases I am sort of preaching to the choir because we have some very skilled observers within our ranks. But even if some of my points serve merely as a reminder to things some already have thought about, then I consider the effort well worth my time. :)
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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#13

Post by Michael131313 » Thu Oct 10, 2019 11:29 pm

Thanks very much Alan. Very useful for me. I bookmarked it.
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#14

Post by kt4hx » Thu Oct 10, 2019 11:43 pm

Michael131313 wrote:
Thu Oct 10, 2019 11:29 pm
Thanks very much Alan. Very useful for me. I bookmarked it.
Thank you Michael. I hope you find that it helps in your pursuit of DSOs. :)
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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#15

Post by Don Quixote » Thu Oct 10, 2019 11:51 pm

One aspect that is addressed here Alan is the way we describe what we see. Your commentary on this for each type of DSO is very helpful to me as I want to communicate in the most understandable way to others what I have observed.

Although at this time interest in AP seems to be eclipsing visual astronomy everywhere I am most comfortable with visual astronomy.

Your article is important to me and I am sure to others who like myself are relatively new practitioners of this art.

I will most definitely be put to use the things you have taught me here.

Thank you again.
SCOPES: ES127 f/7.5, ES80 f/6, SW100 f/9. Meade LXD75 8" Sct f/10, Meade 2120 10" Sct f/10, Bresser 152 f/6.5 Newt.
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#16

Post by Kos » Fri Oct 11, 2019 6:22 pm

Спасибо вам за ценную информацию! Поделился ею со своими друзьями: https://vk.com/@openastronomy-klassifik ... nabludenie
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#17

Post by kt4hx » Fri Oct 11, 2019 10:26 pm

Kos wrote:
Fri Oct 11, 2019 6:22 pm
Спасибо вам за ценную информацию! Поделился ею со своими друзьями: https://vk.com/@openastronomy-klassifik ... nabludenie
Спасибо Кос, и я надеюсь, что это полезно для вас и ваших друзей. :)
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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#18

Post by Gordon » Fri Oct 11, 2019 11:01 pm

Great article!
Thanks for posting
Gordon
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#19

Post by Thefatkitty » Sat Oct 12, 2019 12:14 am

Always a pleasure to read what you write Alan, and this was of course no exception! Thanks for that; if anything, it'll at least keep my frustration level down some :lol:

But of course, I hope to and will get more than just that from it :D

Thanks again and all the best,
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#20

Post by kt4hx » Sat Oct 12, 2019 12:23 am

Gordon wrote:
Fri Oct 11, 2019 11:01 pm
Great article!
Thanks for posting
Thank you Gordon and I appreciate having the ability to contribute to the community.
Thefatkitty wrote:
Sat Oct 12, 2019 12:14 am
Always a pleasure to read what you write Alan, and this was of course no exception! Thanks for that; if anything, it'll at least keep my frustration level down some :lol:

But of course, I hope to and will get more than just that from it :D

Thanks again and all the best,
Thanks Mark, I appreciate your comments. I sincerely hope that it helps you in some small way to get more from your pursuit of DSOs. :)
Alan

Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
ES AR127 f/6.5 & ED80 f/6 on Twilight-II || Apertura 6" f/5 Newtonian on Twilight-I
ES 82° 24mm, 18mm; TV Ethos 100° 13mm; Pentax XW 70° 10mm, 7mm, 5mm + barlows
DGM NPB Filter || Orion Ultra Block, O-III and Sky Glow Filters || Baader HaB Filter
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"The eternal silence of these infinite spaces frightens me...." (Blaise Pascal)
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