5 replies to this topic

[Dan Crowson]

Abell 1060 (the Hydra I Cluster) is grouping of 157 galaxies located approximately 134 million light-years away (https://www.aanda.or...8/aa1583-04.pdf) in Hydra. The bright (mag 4.89 V) star is HD 92036. See the annotated image for more objects.

Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

240 minutes total exposure – 4 hours

Imaged on May 3rd, 2019 and January 11th, 2021 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.

LRGB - https://www.flickr.c...096888/sizes/l/

LRGB annotated - https://www.flickr.c...096823/sizes/l/

 

See the links above because the attached image has been down-sampled.

 

 

Dan

[John Rogers]

Great photo!  Do you have an idea of the limiting stellar magnitude?

[Strongmanmike]

That's a great effort on a southern galaxy cluster Dan, very well done 

 

Mike

[nateman_doo]

This is going to sound like some rookie stuff, but how do you get the image annotated like that?

[Dan Crowson]

This is going to sound like some rookie stuff, but how do you get the image annotated like that?

I tend to not use PixInsight but it has a script that will do this. You use the Image Solver and then the Annotate. I'm sure there are good tutorials to be found with more detail.

Dan

[Dan Crowson]

Great photo!  Do you have an idea of the limiting stellar magnitude?

Thanks for looking. I'm not 100% sure. Just loading into Aladin and looking at quasars, I see ones at 19.5V. This image seems fairly deep for the short refractor and I think this one was only a maximum of 30 degrees high for me.
 
Dan