Thursday, December 15, 2016

returned to Jupiter's Ghost (Halifax)

Back in April, I tried to image this target. Neat to work on it again. It's coming around the corner, a target best viewed in the winter. NGC 3242 or Ghost of Jupiter is back. Also known as Caldwell 59.

This was early in my usage of the BGO robot and I did not have a lot of experience. I've since realised that planetary nebulae are rather bright and using 60 second subexposures, fine for galaxies, causes problems. On April 24, I thought the images were blown out. I also felt the blue data very poor. And for PNs, now, I'm trying to collect O-III data.

This time I halved the exposure times, I collected more blue data, requested oxygen, I skipped the luminance, and doubled-up on the hydrogen.

RASC Finest planetary nebula NGC 3242 in green

Green only, 30 seconds subexposures, 10 stacked shots. Looks OK.

RASC Finest planetary nebula NGC 3242 in blue

Blue only, 30 seconds subexposures, 10 stacked shots. Also looks OK.

RASC Finest planetary nebula NGC 3242 in O-III

O-III only, 30 seconds subexposures, 5 stacked shots. Love that. No stars!

RASC Finest planetary nebula NGC 3242 in H-alpha

H-α only, 30 seconds subexposures, 10 stacked shots. Looks OK.

All processed with FITS Liberator and Paint.NET. All: north is up; east is left.

1 comment:

Katrina Ince said...

Waiting for comet 45P to be visible from Halifax!