Starship Asterisk*

litobrit wrote:Hello,
A M33 captured in 2014 and January 2017.
2 tiles.
About 15 hours of LRGB and 4 hours of Ha. only bin 2, 300s for LRGB and 1200s for Ha.
RCGSO8, AZEQ6, Atik 383, Lodestar.
Acquisition with Maxpilot, MaximDL, Focusmax.
Processed with Pixinsight and Photoshop.
The full is here http://img11.hostingpics.net/pics/506292M331417.jpg
I hope you will enjoy it.
Bernard Michaud

My pictures are here : http://www.astrobin.com/users/litobrit/

artem wrote:The Anteater Nebula in Corona Australis

The image was taken at the Namibian farm near Gamsberg mountain over 5 nights

Total exposure time 26,5 hours
Canon 5DMkII(modifyed)
Newton200/4,Winne2.5"

Namibia



The Anteater Nebula in Corona Australis by Artem, on Flickr

Ann wrote:


That's a lovely wide angle portrait of a blue reflection and its surroundings!

It seems probable that the two stars, HR 5999 and HR 6000 (easy designations to remember) were born out of the elongated dust lane where they are now located. At least the dust lane to the east (left) of them is very thick and dark, which seems just right for star formation.

Interestingly, even though much of the blue light that the stars emit is scattered in the blue reflection nebula, the brightest component, HR 6000, still has a negative B-V index, -0.071 ± 0.002 in Johnson, and a tad bluer in Tycho. That is even more remarkable in view of the fact that the star is classified as an A1/A2III star, too. The "III", which means an evolved star, seems very unlikely.

But stars classified as A1 or later do so very rarely have negative B-V indexes. This one does, and it's solidly negative, too, not -0.001 or something. How remarkable!

Ann