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View Full Version here: : Obscure Spiral IC4351

furgle
14-05-2019, 08:53 AM
Not much reference material on this one


Higher quality image here (https://observatory.site/astrophotography/Spiral_Galaxy_IC4351/)



**Image:**

* 58x 360s Luminance
* 17x 360s Red
* 16x 360s Green
* 16x 360s Blue

Total integration 10 hours 42 minutes.

**Hardware:**

* Celestron 11" EdgeHD
* Skywatcher EQ8 Pro mount
* QSI 683-ws8 Camera @ -15°C
* Astronomik Luminance, Deep Sky RGB filters
* Starlight Xpress Lodestar X2 Autoguider
* Starlight Xpress Active Optics
* Innovations Foresight On Axis Guider
* Starlight Instruments Focus Boss II

**Location:**

* Exposed during 4 nights between 9th April and 17th April 2019.
* Orange zone in Brisbane, Australia. (Bortle 7)
Placidus
14-05-2019, 02:56 PM
A very nice discovery.

Wondering if that is a crop of the full image. How many sec arc per pixel, and what's the angular diameter of the galaxy?

A very pretty image.
furgle
14-05-2019, 04:06 PM
It’s a slight crop, I’ll run it through a plate solver next time I’m at a computer. You might be able to get it solved from this image, the focal length is 2800mm and pixel size 10.8μm
cometcatcher
14-05-2019, 11:27 PM
Beautiful shot! How do you find which ones to image, since there are so many?
gregbradley
15-05-2019, 06:34 AM
Very nicely imaged.

Greg.
furgle
15-05-2019, 09:24 AM
Dimensions are approx 6.8 x 2.3 arcmin. 0.773 arcsec/px
furgle
15-05-2019, 09:55 AM
Mainly just typing in NGC & IC numbers into a spreadsheet that I programmed to show altitude vs time of year & moon phases, etc. I like math & data way too much.
topheart
15-05-2019, 05:21 PM
Nice image!!
It would be great to be able to simply plug in any NGC or IC number and see a graph of the object's altitude v time like that....

Cheers,
Tim
Capella_Ben
16-05-2019, 07:24 PM
Fantastic image! Love that spreadsheet.
codemonkey
17-05-2019, 07:48 PM
Nice one Adam, don't think I've seen it before. That spreadsheet looks pretty slick too!
Geoff45
18-05-2019, 01:06 PM
Beautiful shot Adam. Colours and detail are good and the galaxy itself is very picturesque. Nice discovery.
Geoff
Chapstick
21-05-2019, 09:33 AM
Very nice image mate.
The_Guru
21-05-2019, 10:31 AM
Phew! Fantastic photo.
multiweb
21-05-2019, 11:08 AM
Great shot of an interesting galaxy. :thumbsup: