methane

[Demonperformer]

In the latest AN, there is a report of a new NB filter that picks up methane, at 889nm. I was wondering if this would make an interesting addition to my narrowband stable (possibly for use instead of the SII?), but two questions arise.

(1) The QE curve on my camera stops at 800nm, but it is dropping before that. Is this camera going to pick up very much at this frequency?

(2) What sort of objects are emitting methane anyway?

Thanks.

[Thalestris24]

Hi

It's a planetary filter to increase contrast where there are methane clouds. I did some dso imaging at 850nm recently and using a cheap IR pass filter. That was with my mono 550d before it died... Very good for combating LP! But no colour, of course. You could also image with it using a full-spectrum modded dslr.

Louise 

[Knighty2112]

44 minutes ago, Demonperformer said:

(2) What sort of objects are emitting methane anyway?

Astro cows?

Sorry, couldn't resist! Hehe!  

[Demonperformer]

I hope others can.

[Demonperformer]

OK, should have googled first. This page leads me to believe that it would not be suitable as an SII replacement, but is used for the imaging the gas giants in our solar system. In that case, I probably won't be forking-out £160 for one.

[Dave In Vermont]

Neptune and Uranus have high concentrations of Methane (CH4) in their atmospheres. Jupiter also has some. Not sure about Saturn.

I've thought of getting one of these. But they're too expensive for now. And, with my luck, if I caved-in and bought one this week - next week they'd be on sale for ½-price.

Dave

Edited October 22, 2016 by Dave In Vermont
Sp.

[Demonperformer]

3 minutes ago, Dave In Vermont said:

with my luck, if I caved-in and bought one this week - next week they'd be on sale for ½-price.

That's a very altruistic offer ...

[Thalestris24]

5 hours ago, Demonperformer said:

OK, should have googled first. This page leads me to believe that it would not be suitable as an SII replacement, but is used for the imaging the gas giants in our solar system. In that case, I probably won't be forking-out £160 for one.

I posted that, above...