Rcw105

EddieT (Eddie) · #1 11-05-2005, 06:31 PM

Hello to all,
I thought some of you might be interested in seeing some of the Ha images I've been doing lately of southern emission regions.
Starting with RCW105 a very interesting area in Norma.

rumples riot · #2 11-05-2005, 06:54 PM

Nice stuff, the region really comes alive under Ha imaging.

Keep them coming.

Rodstar (Rod) · #3 11-05-2005, 10:56 PM

Nice image Eddie. Does that area have an NGC #?

[1ponders] (Paul) · #4 11-05-2005, 11:02 PM

Your really tempting me Eddie to get the IR filter removed from my 300D and get a Ha filter. That's a great shot.

iceman (Mike) · #5 12-05-2005, 08:07 AM

Very nice! Are you going to combine it with some RGB exposures?

I just love the long exposure HaRGB stuff that Suk Lee and others do.. your image is superb.

EddieT (Eddie) · #6 12-05-2005, 08:26 AM

Rod,
This object doesn't have an NGC number. It's one of our mysterious nary-seen southern gems. I only discovered it from my Milky Way mosaic which I'm using to pick areas of interest from. It's a sort-off backward discovery mission for me

Also known as Gum51 and located at RA: 16h10m0.0s Dec: -49°08'00", this is not a very bright object.

This exposure is 7.5 hours taken over three nights and the field covers 56 x 38 arcminutes.

EddieT (Eddie) · #7 12-05-2005, 08:31 AM

Paul (R), I've been very tempted to get one of the later digital cameras. I have a Sony DSC-P1 (3.3MP) but back when I bought it a camera with manual exposure settings was about $70k! Needless to say it's not really useful for astrophotography.

EddieT (Eddie) · #8 12-05-2005, 08:41 AM

Mike, Yes I have done a HaRGB of this one. Total exposure time was 9.5 hours. Here you go.

[1ponders] (Paul) · #9 12-05-2005, 08:43 AM

iceman (Mike) · #10 12-05-2005, 08:43 AM

Just georgeous Eddie! Is it visible at all through a telescope? Do you need any UHC/OIII filters for it?

EddieT (Eddie) · #11 12-05-2005, 08:58 AM

It's a HII region so a Ha/Hb (maybe Red) filter would help, but I've never visually attempted it so I can't say. Optical emission line fluxes of these (RCW/Gum) objects are also hard to come by so I cannot give you an estimate. Based on my data I would say it would at least be "very hard".

All you can do is try I suppose it shouldn't be hard too to locate being within the main formation of stars in Norma.

My Milky Way Map may help you http://astroshed.com/milkymap.html

It's object number 12 in Norma.

ving (David) · #12 12-05-2005, 09:02 AM

man do you do some long exposures!
gret pics eddie!

EddieT (Eddie) · #13 12-05-2005, 09:07 AM

Thanks Ving. I'm not in the best place for astrophotography so long exposures are needed to cut through the light pollution and average out the mediocre seeing.

h0ughy (David) · #14 12-05-2005, 02:02 PM

They are absolutely fantastic images. You have definetly got everything spot on in the tin shed!

EddieT (Eddie) · #15 12-05-2005, 02:25 PM

Thanks Houghy, it took some months and quite a bit of tweaking but the new system is finally working well.

rumples riot · #16 12-05-2005, 02:36 PM

Yes I like the colour image much better. Nice detail and very sharp. Good stuff Eddie.

EddieT (Eddie) · #17 12-05-2005, 03:26 PM

Thanks Paul, I prefer the colour version too. It tends to bring out more contrast.

tornado33 · #18 12-05-2005, 11:40 PM

Yes great shot. Speaking of RCW objects heres one two down from yours, RCW 103
http://www.users.on.net/~josiah/temp/rcw103small.jpg
taken last year. Its just a stack of two 5 min shots with 300d and 10 inch f5.6 scope
Scott

EddieT (Eddie) · #19 13-05-2005, 08:17 AM

Good one Scott. These RCW regions are dim suckers aren't they!

xelasnave · #20 13-05-2005, 08:40 PM

I am totally impressed with your work Eddie.. brillant stuff. Mate if you ever want to work out of a dark site just call by, I would love to see how you would go in a better site... or have you taken it as far as possible with your current work? I have a 300d and a couple of scopes could you please tell me what one has to do to set up for ha work.. I have no idea
alex