[AZ-Observing] Re: Faint nebulosities surrounding M42
- From: "Jon Christensen" <jonc97@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Fri, 16 Dec 2005 23:44:54 -0700
Hi Andrew. You are correct about blending different exposure lengths.
About 95% of the picture was shot on December 4-5 with the luminance being a
series of 24 ten minute exposures (not counting the exposures I had to toss)
and the color data which were 5 minute subs binned 2x2. The brightest
parts of the nebula saturated my chip and turned completely white which is
what I expected. I then used data from last year's picture to fill in those
parts that were saturated because I felt I couldn't improve on those areas
this year because I was using the same equipment. Those exposures ranged
from 5 seconds to 2 minutes. The 5 second exposures were about as long as I
could go without saturating the trapezium with my F/3 scope.
Jon Christensen
----- Original Message -----
From: "Andrew Cooper" <acooper@xxxxxxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Sent: Thursday, December 15, 2005 11:08 PM
Subject: [AZ-Observing] Re: Faint nebulosities surrounding M42
> Jon,
>
> Your data didn't say, but I assumed you blended a couple images of
> different exposure lengths to get both the core and the faint stuff in
> the same image. Details?
>
> Andrew
>
> Jon Christensen wrote:
>
>>Hello fellow Arizona stargazers,
>>This is a photo of the Orion Nebula I took out at Vekol the night of
>>December 4th/5th. My goal for this picture was to concentrate on bringing
>>out the faint nebulosities that surround the nebula. I got a hint of them
>>with last year's picture and I've been waiting a year to have another go
>>at it and see what I found.
>>
>>http://members.cox.net/jonc97/images/astro/nebula/m42_2005.htm
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