The Flickr Ngc7331 Image Generatr

NGC 7311, The Deer Lick group and Stephen's Quintet

1h20 total integration

Taken with,
150PDS
Altair 26C
EQ6r Pro

The Deer Lick Galaxy Group is really only a visual grouping of galaxies in the constellation Pegasus.

The large, spiral galaxy NGC 7331 in the centre of this picture is a foreground galaxy in the same field of view as the collection known as the Deer Lick Group. It contains four other members, affectionately referred to as the "fleas": the lenticular or unbarred spirals NGC 7335 and NGC 7336, the barred spiral galaxy NGC 7337 and the elliptical galaxy NGC 7340. These galaxies lie at distances of approximately 332, 365, 348 and 294 million light years, respectively.

Although adjacent on the sky, this collection is not a galaxy group, as NGC 7331 itself is not gravitationally associated with the far more distant "fleas"; indeed, even they are separated by far more than the normal distances (~2 million light years) of a galaxy group.

Even so, it is nice to be able to capture so many galaxies in one shot.


Telescope: Celestron C11-A XLT Schmidt Cassegrain OTA
Mount: SkyWatcher EQ6-R Pro

Controller: ZWO ASIAIR Pro
Main Camera: ZWO ASI533MC Pro at -10C
Filter: ZWO UV/IR Cut filter
Focuser: ZWO EAF
Guide Camera: ZWO ASI174MM Mini guidecam
Guide via: ZWO OAG

Stacked from:
Lights 93 at 120 seconds, gain 101, temp -10C
Darks 30 at 120 seconds, gain 101, temp -10C
Flat 30 at 1.14s, gain 101, temp -10C
Dark Flat 30 at 1.14s, gain 101 temp -10C

Bortle 4 sky.
Integrated the saved frames in Astro Pixel Processor.
Processed in PixInsight.
Captions added in Photoshop CS4

Autour de la galaxie C30 (NGC 7331). Les miroirs se sont recouverts de buée au cours des prises, il y en a peu... Traitement GIMP assez léger (c'est fragile ces petites galaxies).

Salut à tous,
En attente d'une éventuelle aurore boréale (qui n'arrivera pas), j'ai pointé mon télescope vers un regroupement de galaxies.
Deux zones attirent directement l'œil, sur la gauche nous voyons NGC7331.
D'une taille et d'une forme similaire à notre propre galaxie, elle se situe à environ 40 millions d’années lumière de nous.
Sur la droite un amas de galaxies... Le quintet de Stephan.
Situé bien plus loin (+- 400 millions d'années lumière), il me faudrait une plus grande focale pour mieux le détailler.
De nombreuses autres petites galaxies peuplent cette image.
Objets notables :
NGC7331
NGC7336
NGC7337
Quintet de Stephan (NGC7317 , 7318, 7319, 7320)
Informations de la prise de vue :
Lieu / date : Observatoire La fosse (Belgique) 04/10/2024
Constellation : Pégase
Acquisition : Total 05h45 (115 x 180)
Monture : ZWO AM5
Tube optique : Celestron C8 Edge HD @1400mm
Caméra : ZWO Asi2600MC (gain 100 / -10°)
Filtre : Aucun
Accessoires : ZWO EAF - ZWO ASIAIR
Traitement : Siril - Pixinsight - Lightroom
Haute définition : www.astrobin.com/7txl23/0/
Bon ciel à tous !

NGC 7331, also known as Caldwell 30, is an unbarred spiral galaxy about 40 million light-years away in the constellation Pegasus. It was discovered by William Herschel in 1784.

NGC 7331 is the brightest galaxy in the field of a visual grouping known as the NGC 7331 Group of galaxies.

In fact, the other members of the group, NGC 7335, 7336, 7337 and 7340, lie far in the background at distances of approximately 300–350 million light years. [WIKI]

Imaged at Los Coloraos, Gorafe, Spain in September 2024 with a Celestron C14 EDGE HD telescope at 3900mm focal length. This has been rotated 90 degrees and cropped in to feature the galaxies.
A total of 13 hours of imaging time using Luminance, Red, Green and Blue filters.

All the technical details and a high resolution image available at: astrob.in/z88o4l/0/

Crop view of NGC 7331 and the Deer Lick Group

About 5.5 hours of data captured from 8-29-24 to 9-7-24. Still using AT8IN on Orion Atlas Pro AZ/EQ-G, but now with Televue Paracorr type 2 coma corrector. Images acquired using APT and PHD2. Processed with Siril, GraXpert, and Images Plus. Lots of tiny galaxies in the background if you *view all sizes* =>*original*

NGC7331 and Stephan's Quintet that contains NGC7319, NGC7320, NGC7318A, NGC7318B, NGC7317. I originally wanted to capture just the Stephan's Quintet but since it's a small target with my telescope I figured I'd include NGC7331 (a galaxy I captured last month). This photo actually contains numerous galaxies that are much smaller and dimmer but the resolution I uploaded the picture in restricts how much you can actually see. However, you might be able to see blue
or white smudges and maybe an occasional small oblong object.

I didn't use any filters.

Telescope: Celestron Edge HD 8" and .7 reducer
Mount: Losmandy GM811G
Camera: ASI2600MC Pro
72x300"
No filter
Bortle 7.1

PID 2348, 2023-07-25

NGC 7331 spiral galaxy in the constellation Pegasus:
22:37:05.600 +34:24:31.90

F560W Blue
F1000W Green
F1130W Red

NGC 7331 (Cadwell 30) is a beautiful spiral galaxy located in Pegasus. This massive galaxy (300 billion suns) is approximately 47 million light years from Earth. NGC 7331 rules over 35 much smaller galaxies of which only a few are within the limits of the photograph.

Photo was taken with a ZWO Seestar S50 where 10-second photos were stacked for 81 minutes. The photo was taken from my suburban yard with a gibbous moon in the sky on the morning of July 27, 2024.

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This NASA/ESA Hubble Space Telescope image shows a spiral galaxy known as NGC 7331. First spotted by the prolific galaxy hunter William Herschel in 1784, NGC 7331 is located about 45 million light-years away in the constellation of Pegasus (The Winged Horse). Facing us partially edge-on, the galaxy showcases it’s beautiful arms which swirl like a whirlpool around its bright central region. Astronomers took this image using Hubble’s Wide Field Camera 3 (WFC3), as they were observing an extraordinary exploding star — a supernova — which can still be faintly seen as a tiny red dot near the galaxy’s central yellow core. Named SN2014C, it rapidly evolved from a supernova containing very little Hydrogen to one that is Hydrogen-rich — in just one year. This rarely observed metamorphosis was luminous at high energies and provides unique insight into the poorly understood final phases of massive stars. NGC 7331 is similar in size, shape, and mass to the Milky Way. It also has a comparable star formation rate, hosts a similar number of stars, has a central supermassive black hole and comparable spiral arms. The primary difference between our galaxies is that NGC 7331 is an unbarred spiral galaxy — it lacks a “bar” of stars, gas and dust cutting through its nucleus, as we see in the Milky Way. Its central bulge also displays a quirky and unusual rotation pattern, spinning in the opposite direction to the galactic disc itself. By studying similar galaxies we hold a scientific mirror up to our own, allowing us to build a better understanding of our galactic environment which we cannot always observe, and of galactic behaviour and evolution as a whole.

NGC 7331 è una grande galassia a spirale nella costellazione di Pegaso: grande sia per dimensione apparente (10,5' x 3,7' - la luna piena ad occhio nudo ha un diametro di 30') sia per dimensione reale (140000 anni luce, quindi più grande della nostra Via Lattea).
Dista da noi 45 milioni di anni luce.
Grazie anche alla sua magnitudine di 10.4, mostra parecchi dettagli sia sui bracci sia verso il nucleo.
Vicino a NGC 7331, nella parte inferiore dell'immagine, si nota un gruppo di altre galassie abbastanza luminose: si potrebbe pensare che siano fisicamente legate a NGC 7331, ma in realtà si trovano ad una distanza circa 6 volte maggiore e quindi appaiono vicine alla grande galassia solo per un puro effetto di prospettiva.

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NGC 7331 is a large spiral galaxy in the constellation of Pegasus: large both in apparent size (10.5' x 3.7' - the full moon with the naked eye has a diameter of 30') and in real size (140,000 light years , therefore larger than our Milky Way).
Its distance is 45 milion light years.
Thanks also to its magnitude of 10.4, it shows a lot of details both on the arms and towards the nucleus.
Near NGC 7331, in the lower part of the image, you can see a group of other quite bright galaxies: you might think that they are physically linked to NGC 7331, but in reality they are at a distance about 6 times greater and therefore appear close to the large galaxy just for a pure perspective effect.

Technical data
GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details:
L 48x300", R 19x300", G 18x300", B 21x300" all in bin3 -15C
Total integration time: 8h50'
Acquisition: Voyager, PHD2
Processing: Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L: 21.04   
Location: Promiod (Aosta Valley, Italy), own remote observatory
Date 11 October/7-8 November 2023

www.robertomarinoni.com

I used this galaxy to test my new equipment and to calibrate all the items i forgot to use because she was up in the sky for many hours.
In the last month i captured in several nights to add data to the test ones and I finally reach this result.
I'm very happy when I see it because it represent my come back to astrophotography after many years.
NGC7331 is an unbarred spiral galaxy about 40 million light-years away in the constellation Pegasus. In the background there are many more galaxies that are much distant, at 350 million light years.

RC10 on AZEQ6 mount
Ares 533 colour with IDAS P2 filter
Nina, Pixinsight and Photoshop for the software side

The luminance for this image was taken at october 10th.
Not as much data, as I intended to get, but you take what you get.
Processing took me a few tries, to get satisfied with the result. The background might be a little dark, but in order to bring the IFN out a bit, I needed to enhance the contrast in the background.

-- EQUIPMENT ---------------------------
Camera: Altair Hypercam 26M
Filterwheel: Starlight Xpress (7 x 36 mm)
Filters: Astrodon LRGB
Telescope: 12" f/4 Newton w. 2.5" Wynne corr. (1140mm f/3.8)
Mount: Astro-Physics 1100 GTO CP4
Guiding: Starlight Xpress OAG with Lodestar X2

Software
Capturing: Sequence Generator Pro
Guiding: PHD2
Processing: Pixinsight

-- Details -----------------------------------
Date: October 7th + 10th 2023
Location: My backyard
Temp Camera: -20°C
Gain: 100
Pixel size: 3.8 μm
Pixel scale: 0.67 Arcseconds per pixel

-- Exposures ------------------------------
L: 25 x 5 min
R: 10 x 5 min
G: 9 x 5 min
B: 9 x 5 min

Total integration time: 4.4 hours.

I've captured some RGB data for NGC 7331 and Stephens Quintet. That night, humidity was exceptionally low with just 20-25%. I will capture the luminance data as soon as possible.

-- EQUIPMENT ---------------------------
Camera: Altair Hypercam 26M
Filterwheel: Starlight Xpress (7 x 36 mm)
Filters: Astronomik Ha 6nm
Telescope: 12" f/4 Newton w. 2.5" Wynne corr. (1140mm f/3.8)
Mount: Astro-Physics 1100 GTO CP4
Guiding: Starlight Xpress OAG with Lodestar X2

Software
Capturing: Sequence Generator Pro
Guiding: PHD2
Processing: Pixinsight

-- Details -----------------------------------
Date: October 7th 2023
Location: My backyard
Temp Camera: -20°C
Gain: 100
Pixel size: 3.8 μm
Pixel scale: 0.67 Arcseconds per pixel

-- Exposures ------------------------------
R: 10 x 5 min
G: 9 x 5 min
B: 9 x 5 min

Total integration time: 2.3 hours.

As a part of our stargazing sessions, we like to include a live-stack of a deep sky object using EAA for our guests.
While we are out on our back Observing Deck guiding visual observing sessions through 8-9 instruments, we have an imaging session going which we share with our visitors on our 75" TV screen when we come back inside.
This galaxy group consists of the main galaxy NGC 7331, a pure spiral located in the constellation of Pegasus and the four "fleas"; galaxies which appear in the same field of view but are much farther away and not associated with each other gravitationally. While NGC 7331 is about 40 million light years away, the fleas range in distance from 290-370 million light years away, which makes them appear much smaller. The "fleas".. galaxies NGC 7335, NGC 7336, NGC 7337 and NGC 7340 are shown to the left of the primary galaxy.
So what's up with the name? "In the 1980s, amateur astronomer Tom Lorenzin was observing in the mountains of North Carolina, at the Deerlick Gap Overlook. Because his view of NGC 7331 and its surrounding galaxies was so memorable, he christened them the Deer Lick Group."
This is 105 sixty-second images taken with our 26" f/4.8 Newtonian Reflector Telescope and ASI6200MC camera on 9/18/2023.
This stunningly beautiful galaxy group would be fun to get a lot more data on and to shoot in narrowband, but the purpose of this image is to give our guests a connection to the cosmos within the couple of hours they spend with us.
www.badlandsobservatory.com

IAU code 918
Latitude: 43° 59' 16.19" N
USA

Données prise de vue
*******************************************************
Date : 2023-09-09
Objet : NGC 7331
Instrument : Newton Quatro 200/800 + correcteur GPU
Monture Atlas EQ-G SynScan GoTo / guidage diviseur optique PHD2 + ASI224MC
Camera : ZWO ASI1600 MC / Filtre = IrCut / Temp = -15°c / Gain= 139 / Offset = 21
Durée pose unitaire = 240s / Nombre de poses : 28
Gestion des captures et pilotage monture : Stellarmate
Traitement SIRIL et PHOTOSHOP.

Données Météo fin de session
*******************************************************
Fin de session StellarMatte : 2023-09-09 05:45:05
Phase lunaire : Last Quarter(0.803)
Lever du soleil : 07:32 AM
Coucher du soleil : 08:29 PM
Conditions climatiques : clear sky
Couverture nuageuse : 3 %
Taux d'humidite de 37 %
Pression : 1014 hpa
Vitesse Vent : 10 km/h
Orientation : 131 ° (N=0° / Est = 90° / Sud = 180° / Ouest = 270°)
La temperature en fin de session est de 17 °c
*******************************************************

The Deer Lick Group & Stephan's Quintet. The last time we imaged these galaxies was in 2018 so it was worth revisiting this region. The session was mainly to test our ability to run on 12 volts DC (an experiment which though mostly successful, highlighted a few problems which need to be addressed and shortened the session). We only managed to get 16 subs but that was enough to produce a reasonable image.

The most noticeable feature in this image is the galaxy NGC 7331 (also known as Caldwell 30). It is an unbarred spiral galaxy, similar in size to the Milky Way, about 40 million light-years away in the constellation Pegasus. It gives its name to the NGC 7331 Group of galaxies (of which it is the brightest and closest member) that are dotted around it and are sometimes referred to as the "fleas". Another name for this group of galaxies is the Deer Lick Group. The other members of the group are the lenticular or unbarred spirals NGC 7335 and 7336, the barred spiral galaxy NGC 7337, and the elliptical galaxy NGC 7340. These galaxies lie at distances of approximately 332, 365, 348, and 294 million light years, respectively.

Further down and centre in the image is Stephan's Quintet, a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The brightest member of the visual grouping is NGC 7320 which is shown to have extensive H II regions where active star formation is occurring. If you look closely you can see that in the centre of this group, the galaxies NGC 7318B and NGC 7318A are already colliding. This collision is creating a giant intergalactic shock-wave (similar to a sonic boom but traveling in intergalactic gas rather than air) bigger than the Milky Way which is spreading throughout the medium between the galaxies, heating some of the gas to temperatures of millions of degrees. This collision can help provide a view into what happened in the early universe, around 10 billion years ago. A sixth galaxy, NGC 7320C (left of the main group), probably belongs to the Hickson association: it has a redshift similar to the Hickson galaxies, and a tidal tail appears to connect it with NGC 7319.

016 x 300-second exposures at Unity Gain (139) cooled to -10°C
055 x dark frames
020 x flat frames
100 x bias/offset frames
Binning 1x1
Total integration time = 1 hour and 20 minutes

Captured with APT
Guided with PHD2
Processed in Nebulosity and Photoshop
Astrometry assistance from Astrometry.net

Equipment
Telescope: Sky-Watcher Explorer-150PDS
Mount: Skywatcher EQ5
Guide Scope: Orion 50mm Mini
Guiding Camera: ZWO ASI120MC
Imaging Camera: ZWO ASI1600MC Pro
Baader Mark-III MPCC Coma Corrector
Light pollution filter