What a night!

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pakarinen United States of America
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Re: What a night!

#21

Post by pakarinen »


notFritzArgelander wrote: Thu Oct 10, 2019 10:04 pm What a haul!
Es verdad!
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Re: What a night!

#22

Post by AbbN »


Obviously The Force was with you :D

Abb
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John Baars Netherlands
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Re: What a night!

#23

Post by John Baars »


Bigzmey wrote: Sat Oct 12, 2019 6:13 am Thanks John! You brought the question I been contemplating myself. How can one see galaxies fainter than 14 mag in the scope with limiting 14.4 mag?

First thing I noticed that DSO parameters very quite a bit from one resource to another. I saw differences in listed mganitude larger then one unit for a few galaxies.

Anza seats at about 4,400 ft abive sea level. It adds 0.2-0.3 to the visible magnitude.

Finally, averted vision can stretch detection limit by quite a bit. I feel with more experience one could add a unit or two to detectable magnitude limit.

Of cause size, surface brightness, and presence of brighter futures are factors two.

It is exciting (to me) subject. :D How far can you push it? :lol:
I think you are quite right on those six variables. Real adaptation of the eye to darkness and averted vision of a well trained eye are rather underestimated. And many even experienced observers tend not to believe it. For dozens of reasons I will not comment on now. All I can say is :" Keep up the good work!"

Like you I am always experimenting with it. How far can I push it under my LP skies where real adaption never is reached?
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX.
GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets).
Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5.
Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS, *Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40
Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt.
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OzEclipse Australia
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Re: What a night!

#24

Post by OzEclipse »


Great report Andrey - as always.
On the subject of limiting magnitude, I agree experience helps but for mine, "the eyes have it :lol: " Pun intended!

When I were a lad, my eyes were much better than they are today. I was involved in a project as an observer/chart checker during the production of a series of galaxy charts used for visual supernova searching. The magnitudes on the charts were marked, I could just see mag 13.9 with my 6" newtonian observing at 1800 feet in dark sky. The 1800ft mountain poked up out of a coastal hinterland that wasn't much above sea level. The place is a rainforest, lots of cloudy nights but the rain would also give us very transparent skies. Today - no way. I haven't checked my limiting Vmag with the 6" but I know my eyes are not a patch on what they were 40 years ago. While it is a matter of academic interest, my preference these days is not to find the faintest smudge I can possibly observe but to use generous aperture to reveal copious detail while wading through brighter more extensive objects.
By 03:00 the sky went winter. I rarely get an opportunity to enjoy winter Milky Way. This time it was magnificent from Cassiopeia in the north through Perseus, Auriga with naked eye clusters, Taurus, Gemini and Orion. Sirius was still relatively low, so Canis Major portion of Milky Way was lost in the sky glow. I have enjoyed the views for awhile and went to sleep around 04:00.
Are you saying it's rare because it is too cold to observe or because the weather is bad during winter? It can get down to about 20F(-6C -> -7C) down here. When I went to a trip to the Arctic in 2015, I purchased an industrial one piece freezer suit and a pair of NEOS overboots. In that gear, I am comfortable in any temperature and I use it frequently here. I'll even doze off outdoors in a camp chair while the camera is shooting a sub sequence at those temps and wake up 1 hr later feeling perfectly warm. I wish I knew about these things 40 years ago. I have yet to strike temperatures locally where I've needed to wear the overboots. I did use the NEOS overboots and the freezer suit observing aurora for 6 hrs at -16C (~3F) and solar eclipse at -23C (-9F) and remained perfectly comfortable throughout. This suit cost me about USD120 and is the best accessory I own allowing me to comfortably observe for extended periods in all conditions.
By 03:00 the sky went winter.
I would describe that as, "the sky went summer," but to each his own. I can also translate, when you guys refer to the Scorpius/Sagittarius star clouds as "the summer milky way," into english, eg "the winter milky way." :lol:

regards

Joe
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Bigzmey United States of America
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Re: What a night!

#25

Post by Bigzmey »


OzEclipse wrote: Sun Oct 13, 2019 7:55 am Great report Andrey - as always.
On the subject of limiting magnitude, I agree experience helps but for mine, "the eyes have it :lol: " Pun intended!

When I were a lad, my eyes were much better than they are today. I was involved in a project as an observer/chart checker during the production of a series of galaxy charts used for visual supernova searching. The magnitudes on the charts were marked, I could just see mag 13.9 with my 6" newtonian observing at 1800 feet in dark sky. The 1800ft mountain poked up out of a coastal hinterland that wasn't much above sea level. The place is a rainforest, lots of cloudy nights but the rain would also give us very transparent skies. Today - no way. I haven't checked my limiting Vmag with the 6" but I know my eyes are not a patch on what they were 40 years ago. While it is a matter of academic interest, my preference these days is not to find the faintest smudge I can possibly observe but to use generous aperture to reveal copious detail while wading through brighter more extensive objects.
By 03:00 the sky went winter. I rarely get an opportunity to enjoy winter Milky Way. This time it was magnificent from Cassiopeia in the north through Perseus, Auriga with naked eye clusters, Taurus, Gemini and Orion. Sirius was still relatively low, so Canis Major portion of Milky Way was lost in the sky glow. I have enjoyed the views for awhile and went to sleep around 04:00.
Are you saying it's rare because it is too cold to observe or because the weather is bad during winter? It can get down to about 20F(-6C -> -7C) down here. When I went to a trip to the Arctic in 2015, I purchased an industrial one piece freezer suit and a pair of NEOS overboots. In that gear, I am comfortable in any temperature and I use it frequently here. I'll even doze off outdoors in a camp chair while the camera is shooting a sub sequence at those temps and wake up 1 hr later feeling perfectly warm. I wish I knew about these things 40 years ago. I have yet to strike temperatures locally where I've needed to wear the overboots. I did use the NEOS overboots and the freezer suit observing aurora for 6 hrs at -16C (~3F) and solar eclipse at -23C (-9F) and remained perfectly comfortable throughout. This suit cost me about USD120 and is the best accessory I own allowing me to comfortably observe for extended periods in all conditions.
By 03:00 the sky went winter.
I would describe that as, "the sky went summer," but to each his own. I can also translate, when you guys refer to the Scorpius/Sagittarius star clouds as "the summer milky way," into english, eg "the winter milky way." :lol:

regards

Joe
Thanks Joe! Some day I will come your way to enjoy the summer or (is it the winter skies?) over there. :lol: When it get closer I will solicit your advice on where to go in Australia to get nice dark skies. As for our winter Milky Way we get most of storms and rain between November and March. The clear nights around new Moon almost never happen, and too unpredictable to plan 2 days trip to Anza. From my home location I can't see Milky Way due to light pollution.
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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Re: What a night!

#26

Post by bladekeeper »


An awesome night, Andrey! Congrats on getting some excellent sky and making great use of it. Well done, my friend! :)
Bryan
Scopes: Apertura AD12 f/5; Celestron C6-R f/8; ES AR127 f/6.4; Stellarvue SV102T f/7; iOptron MC90 f/13.3; Orion ST80A f/5; ES ED80 f/6; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen Polaris
Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett Gemini 12×60 LW, Gordon 10×50, Apogee 20×100

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Bigzmey United States of America
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Re: What a night!

#27

Post by Bigzmey »


AbbN wrote: Sat Oct 12, 2019 1:44 pm Obviously The Force was with you :D

Abb
pakarinen wrote: Sat Oct 12, 2019 11:49 am
notFritzArgelander wrote: Thu Oct 10, 2019 10:04 pm What a haul!
Es verdad!
bladekeeper wrote: Sun Oct 13, 2019 10:11 pm An awesome night, Andrey! Congrats on getting some excellent sky and making great use of it. Well done, my friend! :)
Thanks guys!
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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