Kappa Crucis Widefield from Kulnura

[iceman (Mike)]

We need Andrew (hector), he'll be able to ID it i'm sure.

[seeker372011 (Narayan)]

Originally Posted by tornado33

Hi all.
Done it, here it is http://www.users.on.net/~josiah/baader/unknownsmall.jpg
Its at
12 deg 50 m21s -61 deg 34.54
the shot is 1350 and 1800 sec shot, ISO 400 cropped full res from larger
image.
Id love to tell you its name but I cant as according to all the starmaps it doesnt exist.
Scott

well done Scott. Finding it must have quite been a challenge since you cant see it in the viewfinder of the Canon at all

As for Narayan's Nebula..let see if some one else can image it to make sure it is not just something from the twilight zone!

[tornado33]

Thanks.
The larger faint blue nebula will be hard for me as its so big, though I should see if I can do a 50mm lens shot of it.
Scott

[john_drummond (John Drummond)]

Hi all,

I did a search on GUIDE 8.0 (software) and it suggests that the object is
GN 12.47.3 - an emission nebula. Information from the Nebula Databank:

GN12.47.3
Maximum diameter: 180 arcseconds
Emission nebula
Brightness level: 5 (1=brightest, ... 6=faintest)
Brightness level extremely approximate

Alternative designations for this object:

GN 12.47.3
RCW 71

I took some wide field shots of the area last night and compared it to Guide and to Scott's image. I created a webpage with the images, Scott's image, and a GUIDE screen shot on it. It can be seen at:

http://www.possumobservatory.co.nz/scott%27s_nebula.htm

or

http://tinyurl.com/8scpp


Hopefully the page is fairly self explanatory. Careful comparison of the
stars between the various images and GUIDE tells the story.

This emission neb lies about 40' from the Jewell Box in a PA of about 200.

BTW, does anyone know what GN stands for - I presume it G... Nebulae(?)

Cheers

John Drummond

[iceman (Mike)]

Great research John, nice job!

[tornado33]

Excellent work John, thanks for the page, its great!
Gn stands for Galactc Nebula , and RCW objects from what I can tell are mostly Supernova remnants. Its quite odd that this object isnt in most popular atlases and catalogues. Now the task for us all is to see if it can be seen visually .
Scott

[tornado33]

This chap must know of it too
http://users.westconnect.com.au/~sjastro/rcw71nc.html
http://users.westconnect.com.au/~sjastro/
He has some nice images there.
Scott

[ballaratdragons (Ken)]

That's the small red nebula answered, but what about 'Narayans Nebula-A' the Blue haze. Has it been captured again to prove it isn't a camera effect.

[john_drummond (John Drummond)]

No problem re the webpage - I enjoyed the mystery and challenge...

Regarding the 'blue nebula' ('Narayans Nebula-A') captured by Narayan, I wonder if it's not some sort of lens ghosting/reflection from the very bright Beta Crucis which lies about 21' beyond the edge of the frame in the same direction. I checked a combined image I took of this area last night with a Sigma 70-200 lens and 1.4x adapter (thus 448mm FL @ f4) and I can't see this nebula (14 x 2 minute at 800asa) - not dismissing the possibilitythough. See the image at...

http://www.possumobservatory.co.nz/s...50726-line.jpg

or

http://tinyurl.com/9q6k5

Cheers

John Drummond
Gisborne, New Zealand
E 178° 03' S 38° 40'
email: john_drummond@xtra.co.nz
website: http://www.possumobservatory.co.nz

[ving (David)]

looked at heaps of info and pics of the area surrounding beta crux and not a sign of any nebulosity...

time to name it!

nice pic btw

[john_drummond (John Drummond)]

Oops, forgot to add that Beta Crucis is at the top of the image and the Jewell Box is at 8 O'Clock to it. The object with 'arrows' is 'Scott's Nebula'. The blue halo around Beta Crucis on my image is no doubt lens artifacts...

Cheers

John

[atalas]

Guys thanks for all the research and images you post !


Louie