A very deep unidentified dark nebula complex in Chameleion

[tornado33]

Hi all
I imaged this last night, very deep south in Chemelion. (-77dec) Its not on the charts so I cannot tell you what its called. It is very faint though, this is 2 hours worth at F3.6
12x10 mins ISO200, uv/ir filter MPCC coma corrector, Meade Cometracker 6inch f3.6 SN. hand guided with q guider cam on 80mm f5 refractor. I was aiming to get the "bright" area round the brighter stars there, was pleasantly surprised to come up with all that ultra faint brown stuff too. Sky conditions were PERFECT. very dark for Newcastle area, LMC easily visible, one of the top 10 nights we get in a year Id reckon, so Im glad I got to chase up this faint obscure object

It does look similar to the nebula complex in Corona Australis only much deeper south and somewhat fainter

Ive attached also a screen shot from Star Atlas Pro, showing the approx field of view of the image.

Can anyone from the co ords, identify what the object is called?
Thanks
Scott

[sjastro]

Scott,

You have imaged the Chamaeleon I association. The reflection nebula next to the dark nebula is IC 2631 RA 11 09.8 Dec -76 37.

Steven

[Karlsson]

Originally Posted by tornado33

Can anyone from the co ords, identify what the object is called?

Very impressive picture!

Be 142 or [B77] 142...

In Hartley et al. 'A catalogue of southern dark clouds' it is divided into several separate objects, see attachment.

The large dark cloud DCld 297.2-15.6 is also known as Sandqvist 135.

[tornado33]

Many thanks Karlsson

[EzyStyles (Eric)]

great shot scotty. this object looks very interesting. im suprised it isnt listed in any of the catalogues.

[Karlsson]

Originally Posted by EzyStyles

im suprised it isnt listed in any of the catalogues.

Eric,

It is listed in 'A catalogue of bright nebulosities in opaque dust clouds.' (C. Bernes 1977) and in 'A catalogue of southern dark clouds' (Hartley M., Manchester R.N., Smith R.M., Tritton S.B., Goss W.M. 1986) and in 'More Southern Dark Dust Clouds' (A Sandqvist, 1977).

What is true is that most of the software we use, as well as internationally published atlases, has a Northern hemisphere slant, for dark nebs relying on Barnard, Lynds or both.

For 'our part' of the skies complementary information is available in the public domain, often proudly made in Australia... just a bit harder to find...

[glenc (Glen)]

Thanks Scott, another interesting image.
I have seen IC 2631 several times, it is not difficult with a 10".