Horse close and personal, with 4 Herbig-Haro objects
Horsehead, bright nebula NGC 2023, and (at least three, probably four) Herbig-Haro objects (circled). H-alpha, 6 x 1hr subs. Aspen 16M on 20" PlaneWave CDK on MI-750 fork. Field 36 min arc, North on the left.
A Herbig-Haro object is formed where a polar jet from a young star slams into pre-existing material producing a mushroom cap on a stalk. These four are too distant to see any detail. Easier examples are seen in the Trifid nebula and in Master Yoda's Walking Stick in Corona Australis.
Clearly a sea-horse, emerging proudly from the salty spume. Observe the small rhino horn on the horse's nose. As well as an obvious set of reins, bits of kelp are hanging from the horse's mouth. Tastes vary. The horse is observing a Loch-Ness style sea-serpent, riding the breaker to the horse's left.
Great level of detail there, Mike, especially if you dig around and find the "O" original size image. I'd never noticed the HH objects in that field before.
Great level of detail there, Mike, especially if you dig around and find the "O" original size image. I'd never noticed the HH objects in that field before.
Cheers,
Rick.
Thanks much, Rick. The HH's were discovered by David Malin at AAT. My postulated 4th one was burned out on his original film image.
Incredible detail Mike, the subtle contrast in the base of the horse (oft not seen) and streamers are excellent. The tiny stars at that FL are impressive, focus is excellent.
Incredible detail Mike, the subtle contrast in the base of the horse (oft not seen) and streamers are excellent. The tiny stars at that FL are impressive, focus is excellent.
Thanks, Fred. Glad you like it.
Quote:
Originally Posted by Rod771
Awesome detail Mike! Excellent.
Cheers, Rod!
Quote:
Originally Posted by Peter Ward
The stars look a tad elongated ( hard to avoid at that FL...)
In any event ...Delightful image scale with tight stellar footprints. Nice one
Thanks, Peter, Suspect that our polar axis is getting a bit stiff and grabby. Truly horrifying thought as taking it all apart is not easy.
Quote:
Originally Posted by multiweb
Superb shot Mike. Mega image scale, almost hubblelesque.
Very nice Mike. Good to see the 20 inch pumping out the goods. A few dark rings from Decon around some stars. You can do a few versions with decon and then blend them with one without allowing the non decon stars to show through.
Stars can be rounded slightly in Photoshop or StarTools.
Very nice Mike. Good to see the 20 inch pumping out the goods. A few dark rings from Decon around some stars. You can do a few versions with decon and then blend them with one without allowing the non decon stars to show through. Stars can be rounded slightly in Photoshop or StarTools. Greg.
Thanks, Greg. I write all my own image processing software. The decon does a trade-off between some residual panda eyes and better dust lanes. I have a "mask and blend" similar to what you suggest, to reduce the panda eyes, but it's not quite there yet.
Quote:
Originally Posted by Bassnut
The slightly out of round stars are no big deal, ... easy to fix, fixed here.
Thanks Fred. That's a good after-the-event fix. The elongation is east-west. I've noticed that if I release the polar axis clutch, the bearings feel alarmingly stiff. I've written to Mathis Instruments asking what to do next, but it's Christmas and no answer yet. I suspect that the very stiff polar axis is messing up the tracking.
