Arp 113

[sdbodin]

A cluster of galaxies about 300 mly away in Andromeda also known as VV166. The bright ones are NGCs 67,68,69,70,71,72,74 with NGC 70 being the big spiral in the center of the group and about a dozen dimmer members too. Imaged a couple nights back with the bright moon messing up the sky background, so I combined with some data from three years ago to get this image. Still not all that good, gradients etc.

Imaged thru Meade 16 LX200 at f6.2 w/Starizona reducer, Atik 460ex mono 18/5min lum, 2/5 min RGB all 2x2 binned for 0.7"/pixel at 2500mm efl. OAG w/QHY5L-II at 2 sec rate. Captured and stacked in Nebulosity final in PS CS5, posted image full size but 30% cropped.

Clear skies,
Steve

[Gordon]

Congratulations Steve on having your image selected as todays TSS APOD!!

https://theskysearchers.com/app.php/art ... of-the-day

[mbocca]

Very nice image Steve. Congratulations on the APOD.

Mike

[helicon]

Congrats on the award Steve!

[John Baars]

Congratulations on the reward! A real nice image!

[messier 111]

very nice shot , thx .

[Greenman]

Well done Steve nice galaxy cluster, congrats on the APOD.

[Makuser]

Hi Steve. A very nice image of a "whole bunch" of galaxies in Andromeda. Nice contrast and lots of objects readily visible. Thanks for sharing this view with us Steve, and congratulations on winning the TSS APOD Award today.

[JayTee]

Yay, Steve!

Nice going.

Cheers,
JT

[STEVE333]

Congratulations on the APOD Steve. You managed to pull out some nice details from these distant galaxies. Hard to imagine that the light you captured started heading this way 300 million years ago. I wonder what they look like "today".

Steve

[kt4hx]

Very nice Steve and quite happy to see someone targeting some galaxies off the usual beaten path. A fine effort to capture a nice grouping.

I observed this group from our dark site in September utilizing the 17.5 inch. Also known as Vorontsov-Velyaminov 166 or VV-166, I utilized magnifications from 110x to 283x to pick up eight galaxies plus nearby NGC 76 which is not part of it.

The NGC 68 group was observed at magnifications ranging from 110x to 283x. It is also known as Vorontsov-Velyaminov 166 or VV-166. It also contains the grouping catalogued as Arp 113. Here are my notes from that session.

NGC 74 (Andromeda, lenticular, mag=14.5, size=0.8'x0.4', SBr=13.1):
A small and pretty dim oval that was separated to the east of the main group.

NGC 76 (Andromeda, lenticular, mag=13.3, size=1.0'x0.9', SBr=13.1):
About 13’ southeast of the previous object and not really part of the group, it was nonetheless noticed as I studied the field. It presented a small and dim diffuse oval even more separated from the main grouping.

NGC 67 (Andromeda, lenticular, mag=14.2, size=0.3’x0.2’, SBr=10,9):
A part of Arp 113 it lay immediately southwest of the main clump of galaxies. It appeared as a dim rounded and pretty small homogeneous mote. Also known as VV-166g.

NGC 70 (Andromeda, spiral, mag=13.5, size=1.4'x1.2', SBr=13.9):
Part of Arp 113 this spiral formed a triangle with NGC 70 and 68 at the heart of the group. Visually it was a small and rounded diffuse glow that was dim to the eye. Also known as VV-166a.

NGC 71 (Andromeda, lenticular, mag=13.2, size=1.2'x1.1', SBr=13.4):
Also part of Arp 113, this galaxy overlapped with the southern edge of NGC 70. Like the others it presented a dim and diffuse glow that was rounded in shape. Also known as VV-166c.

NGC 72 (Andromeda, barred spiral, mag=13.5, size=1.1'x0.9', SBr=13.3):
Another piece of Arp 113 it lay just southeast of the main clump and appeared dim and diffuse. Rounded in shape it was also small in visual size. Also known as VV-166d.

NGC 72A (Andromeda, elliptical, mag=14.7, size=0.3’x0.3’, SBr=12.0):
Just east of NGC 72, this was a difficult tiny knot of diffuse light that was a bit tough. It is more properly catalogued as MCG +5-1-70, as well as designated VV-166h.

NGC 69 (Andromeda, lenticular, mag=14.8, size=0.5’x0.3, SBr=12,5):
Yet another portion of Arp 113, this small and very dim rounded pip of light lay just south of the main clump. Homogeneous in appearance, it was not easily scooped up. Also known as VV-166e.

NGC 68 (Andromeda, lenticular, mag=12.9, size=1.2’x1.1’, SBr=12.9):
Finally the namesake and final part of Arp 113 lay in a triangle with NGC 70 and 71 in the main knot, overlapped with the two along their western edges. A little brighter than the others, it nonetheless was not showy by any means. Round and diffuse at all magnifications. Also known as VV-166b.

[Jay Smedley]

Nice pic, congratulations!

[sdbodin]

Very nice Steve and quite happy to see someone targeting some galaxies off the usual beaten path. A fine effort to capture a nice grouping.

I observed this group from our dark site in September utilizing the 17.5 inch. Also known as Vorontsov-Velyaminov 166 or VV-166, I utilized magnifications from 110x to 283x to pick up eight galaxies plus nearby NGC 76 which is not part of it.

T

Thanks Alan,
I like your visual description a lot. Funny how the photographic 'feel' differs from the real-time view. The brighter lenticular and ellipticals are visually easier. The big spirals are diffuse visually, but are the showpieces photographically. Just inverted from one to the other.

Thanks again,
Steve

[kt4hx]

Very nice Steve and quite happy to see someone targeting some galaxies off the usual beaten path. A fine effort to capture a nice grouping.

I observed this group from our dark site in September utilizing the 17.5 inch. Also known as Vorontsov-Velyaminov 166 or VV-166, I utilized magnifications from 110x to 283x to pick up eight galaxies plus nearby NGC 76 which is not part of it.

T

Thanks Alan,
I like your visual description a lot. Funny how the photographic 'feel' differs from the real-time view. The brighter lenticular and ellipticals are visually easier. The big spirals are diffuse visually, but are the showpieces photographically. Just inverted from one to the other.

Thanks again,
Steve

That is the thing, the structural differences between ellipticals/lenticulars versus spirals is a telling thing. The former tend to have more uniform surface brightness across their dimension. The spirals however can exhibit more variability because of the density of the core in relation to the more diffuse structure in the outer disk (arms). Of course there are exceptions to those generalities, but in more cases than not I've found that to be true.

[MariusD69]

Awesome! Well done, Steve! Congrats for APOD!

[bernhardhubl]

Hello Steve,

Wonderful details in this not often photographed group of galaxies!

best,
Bernhard

[Ruud]

Galaxies alone: weak. Galaxies together: strong!

A wonderful image, Steve. Congrats on the APOD.

[Astrovetteman]

Hey Steve, GREAT image of those faint fuzzies! You got some great detail in those little guys!
Congrats on the APOD!
Tom

[Ylem]

Very nice, and congratulations

[BABOafrica]

Congratulations on winning the TSS APOD award.

We don't see a capture of the Arp galaxies often (unless it's Dan C, who does them so well).

You did this one quite well yourself.

BABO