NGC 7098 in Octans

[Geoff45]

Here's an interesting little galaxy in Octans.

Actually it is probably the only interesting thing in Octans which has:


No myths
No Messier objects
No meteor showers
One star brighter than 4th magnitude (nu Octantis at mag 3.76)

The image is here https://www.astrobin.com/363768/
with higher res here https://www.astrobin.com/full/363768/0/


[From the ESO website] NGC 7098 is an intriguing spiral galaxy with numerous sets of double features. The first of NGC 7098’s double features is a duo of distinct ring-like structures that loop around the galaxy’s hazy heart. These are NGC 7098’s spiral arms, which have wound themselves around the galaxy’s luminous core. This central region hosts a second double feature: a double bar.

NGC 7098 has also developed features known as ansae, visible as small, bright streaks at each end of the central region. Ansae are visible areas of overdensity — they commonly take looping, linear, or circular shapes, and can be found at the extremities of planetary ring systems, in nebulous clouds, and, as is the case with NGC 7098, in parts of galaxies that are packed to the brim with stars.


Integrated Flux Nebula (IFN) occurs throughout the area, as well as many background galaxies.
The FOV is 45' x 42'.

[Terry B]

Nice image of a pretty galaxy. Well done.


Actually I have an interesting object in Octans. :P
It isn't all boring.

Alp Oct is a 5.15 mag star that is catalogued as an EB star and a spectroscopic binary. The EB period is 2.88 days on very minimal data but the spectroscopic period is 9.03 days. There is clearly an error. I have measured the spectra and found a period of 2.87 days so the SB data seems to be incorrect. You can always find something interesting even in dim parts of the sky.

[batema]

Very nice galaxy. Great photo.

Mark

[Bart]

That is awesome! Absolutely fantastic! :eyepop:

New challenge Mike and Trish!! :hi:

[billdan]

Well done Geoff, looks great and more galaxies in the frame as well.
:thumbsup:

I have to ask, how difficult was guiding near the pole, I tried and failed guiding close to the SCP.

[Ryderscope]

A great catch with lots of interesting stuff happening.

[multiweb]

Great field Geoff. A beautiful galaxy. :thumbsup:

[Peter Ward]

Ditto what they said. Great work !

[cometcatcher]

Lovely field and composition.

[RickS]

Love it, Geoff! A different object and a great image too.

[Geoff45]

Thanks Terry. I managed to dig out a few more interesting things in Octans. δ Octantis is Saturn's southern pole star. BQ Octantis (mag6.8) is only 14' from the SCP--much closer than sigma. There are two stars in Octantis with known planets.There are a few binary stars. As you say, there is no part of the sky that is uninteresting.





Thanks mark and Bart



Thanks Bill. I didn't have any guiding problems with this one. Perhaps it's because I have a very accurately polar aligned permanent setup.











Thanks Rodney, Marc, Peter, Kevin and Rick.

[Placidus]

Superbly done, Geoff! An excellent capture in only 10 hrs, and beautifully processed too, with good colour. No sign of field rotation either, despite being so far south.

A most intriguing object with its tightly wound, one could almost say overwrought spiral arms, and those bright little caps at the end of the bar. You've raised the bar! Lots of little background chaps, and integrated flux nebulosity closer to home too.

Best,
MnT

[h0ughy]

Fantastic result for a quiet area. Had no idea there was anything there

[strongmanmike]

Really nice result on this cool galaxy Geoff well done, the foreground Cirrus always looks good :thumbsup: when I shot this 2 yrs ago I had good seeing and I recall guiding was great near the pole.

Mike

[Geoff45]

Thanks David. As Terry pointed out there is always something interesting even in the dimmest parts of the sky.



Thanks Mike. I saw your take on this one—really really good.
Geoff

[Tropo-Bob]

That picture took my breath away. Thanks also for providing further information about the galaxy.

[Andy01]

Very nice catch Geoff - well done on chasing down this rare object on the path less travelled. :thumbsup:

[Atmos]

Really good Geoff, particularly like all the IFN ain the area. Didn’t know it was down there!

[Stevec35]

Very nice image of a great looking galaxy. Top shelf stuff!

Steve

[Geoff45]

Thanks Bob. Hope you’re still breathing.


Thanks Andy. It’s nice to fossick around and find unusual objects


ThanksColin. There’s a lot of dust throughout Octans and some of the other far south constellations. I hope to get a few examples in the near future


Thanks muchly Steve