Tucana from MAS dark site

[multiweb]

Here's my second picture from that night. I kept only 4 subs out of 8 or so because most of them were taken through clouds and only 4 of them really stood out. I was there for about 1h until Orion got above the tree line and the clouds dissipated.

So it's 4x5min and I overcooked the core :P but I still got some nice star colors in the surroundings and resolved a bit of the two other DSOs on each side of the cluster NGC121 & NGC152 I believe?

[strongmanmike]

Yeh, nice shot Marc

Mike

[jase]

Processing 101 Marc...Whats with the clipping?

[multiweb]

Thanks Mike :thumbsup:



Yeah I did just a bit. The left of the histogram is actually very steep so although it looks like it's clipped the black point is extremely close. I would never do that for a neb but that's a cluster and there's not much else apart from the stars but for the sky background. As I had to dump most of the subs I took the decision to raise the black point to get rid of the sky noise ;)

[rat156]

HI Marc,

Nice Toucan.

Can you send me the original size file. I'd like to do a comparison b/w OSC and LRGB. There are a couple of interesting areas in 47Tuc that I've only discovered since I took the picture the other day.

I'd also like your imaging details (i.e. camera, scope etc.)

Send me a PM or email.

Cheers
Stuart

[multiweb]

No worries. I'll upload the raw fits channels and send you the links.
That was taken at prime focus with a QHY8 on a Celestron Nexstar SLT. F/5, 130mm , 600mm FL. Image scale on imager is 2.48arcsec/pixel.

[Bassnut]

woozy easy, but nice........ish :whistle: ;).

[Hagar]

Nice one Marc. Great star colour Ok.

[multiweb]

:lol: Goodish enough? ;)

Thanks Doug. PS color saturation does a great job. :)

[iceman]

Nice work Marc, lovely cluster.

[multiweb]

Thanks mike - glad you think so. :thumbsup:

[robin]

Wonderful shot Marc. Best ive seen for a while.

[TrevorW]

Nice but the cores overcooked and the colours not quite right

Tuc has a lot of yellow and blue stars

whats the litte faint fussy middle left

Cheers

[multiweb]

You're way too kind Robin. :thumbsup:


You're right Trev. Had another look at Stuart's version and a couple others on line. It's yellow. Mine's way too blue. It's due for a sidonio then. ;) I think the faint fuzzies are other globular clusters in the back.

[TrevorW]

Out of interest maybe someone could tell me what designation the two faint fussies are the one on the left and the other right they do look like globular's

[multiweb]

I checked in CDC and it looks like NGC121 & NGC152 .

[TrevorW]

Thanks Marc

[ngcles]

Hi Marc, Trevor & All,

Trevor asked me by private message prior to Marc's attempt at identifying the two small clusters on the left and right edges of the image, to I.D them.

From my observing notes, Megastar v5.0 and after having a bit of a quick poke around SIMBAD I can confirm the identification of NGC 121 on the right-hand side, -- but I'm pretty certain the cluster on the left is not NGC 152.

Instead, I believe it to be Kron 3. It is clearly shown on the DSS at (approx -- my position from Megastar) RA 00 24 46.5 Dec -72 47 35. I have a (1996) recorded visual observation of it with 25cm and I'm a little surprised more people don't notice it being not a lot fainter than NGC 121. It is however rarely (if ever) marked on commercial planetarium software. Megastar 5.0 does not I.D it.

Kron 3 (AKA ESO 28-19 & Lindsay 8) was once believed to be an SMC G.C. However more recent studies (in the last 10-odd years) indicate Kron 3's metallicity and age are not indicative of being a globular. It is now strongly believed to be an intermediate age (6.5-7.0 gyr old), quite evolved but very populous open or galactic cluster.

http://simbad.u-strasbg.fr/simbad/sim-id?submit=display&bibdisplay=refsum&bibyear1=1850&bibyear2=2009&Ident=@3276063&Name=ESO++28-19

Perhaps even more interestingly, the image also shows Kron 7 (ESO 28-22 & Lindsay 11), a much smaller and fainter smudge directly "up" from Kron 3 and just above a 14th mag star. This too was once thought to be an SMC globular but is now also strongly believed to be an aged, populous O.C. It too is visible with 25cm but extremely faint.

http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Kron+7&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id


Nice image BTW!


Best,

Les D

[multiweb]

Thanks for identifying that Les. :thumbsup: Very interesting write up. I didn't even notice the third faint cluster until you've mentioned it and it indeed shows in the pic.