LBN412 Region: L + Ha + RGB at 34.5 hours

Comment

Comment by Derek Baker on September 12, 2011 at 11:35am

Awwwwwwwesome! :-)

Comment by Conor on September 10, 2011 at 8:47am

Holy crap! That HH 34/222 shot is absolutely outstanding!

Comment by Richard Crisp on September 10, 2011 at 8:23am

here are some other HH objects I have imaged

http://www.narrowbandimaging.com/herbig_haro_34_page.htm

http://www.narrowbandimaging.com/hh555_mk1sn2_cm10_geg_CSs2hao3_pag...

note the maps on this one

http://www.narrowbandimaging.com/ngc1999_s2hao3_ap180_6303_page.htm

and a better image of that area below:

http://www.narrowbandimaging.com/ngc1999_180edt_6303_ha_page.htm

Comment by Richard Crisp on September 10, 2011 at 8:19am

Observers.org is known a TAC (the astronomy connection)

It is an internet based visual observing club in the SF Bay area in Northern Cal... mostly it is south bay and east bay people that are members.

Since these people are all local to my residence (I live in Silicon Valley during the week), I sometimes post images there... I usually comment more about what is in the image than how the image was taken or details of the processing. They are visual folks. So that's why I made the PNe and HH objects easier to see etc, that is what interests them.

Comment by Conor on September 10, 2011 at 8:00am

Oh dear, I take it that it's some sort of mailing list archive, then, and not where you posted to.

Here's the link: http://observers.org/tac.mailing.list/2011/Sep/0367.html

I've only recently been reading about the HH objects with the latest post from the Hubble team about the wealth of these objects in the Orion area. They're quite interesting.

I'd love to attempt some of the lesser known PNe. Perhaps when my narrowband skills are a little better.

Comment by Richard Crisp on September 10, 2011 at 7:38am

Observers.org... interesting!

There are at least two HH objects in the area... here's a list of HH objects you may find useful

http://www.narrowbandimaging.com/incoming/HerbigHaro.PDF

The PNe are usually easy to spot in a color image, particularly if you use the S2/Ha/O3 method. They have a different color and that usually stands out pretty well. But it helps to have the full resolution image to see them.

Glad you like the image!

Comment by Conor on September 10, 2011 at 6:37am

This is incredible. I admit, I had to look up your post on the observers.org mailing list to spot the PNe and H-H object, but I am in awe at this image. It's an absolutely amazing shot. Excellent work, Richard.

Comment by Richard Crisp on September 9, 2011 at 7:49pm

Hi Marc
No problem on the Qs... I love to help if I can.

Since I had only a short time to use the camera and then had to return it, I took RGB over two nights and then did a processing of it. Usually the Red has a lot of signal when it comes to nebulae (there's lots of hydrogen emission in a nebula and that means Ha, Hb, Hg etc...) so I didn't need much more red. But Blue is weak in KAF sensors so you always need more blue. Green shows grain really badly because the eye is so sensitive to green so I typically need more green too. So I basically spent two nights shooting RGB.

Then I decided to shoot some Lum for a full night: nothing but luminance from dusk to dawn tossing out the junk on either end.

Then I went for some Halpha, and did one night full Ha and then a half Ha/Blue night (blue is good for refection nebulosity)

so all in all I had six nights to use it under the stars and I just took data in the same object each night and was able to use 34.5 hours worth. That's a bit less than 6 good hours per night so that was decent efficiency considering it is dark from 10PM to 5AM (7 hours) this time of year....

Comment by Marc Basti on September 9, 2011 at 6:45pm

Richard, when you are shooting these long duration shots (24hrs +) do you have predetermined time in mind or do just go till you (or other factors) say enough? Where's (or how do you determine) the point (w/any equipment setup) that adding any more exposure time will not improve the pic? Sorry I keep peppering you w/questions- How about we call it Crisp's Q+A Corner lol. Thanks, Marc