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 Post subject: Perigee Moon
PostPosted: Thu Dec 07, 2017 10:15 am 
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Joined: Tue Dec 31, 2013 9:06 am
Posts: 43
I don't normally take images of the full Moon but since the Moon was at perigee on Sunday evening or close to it, I thought I might try an experiment.

Using my Tak FSQ106ED and QSI 6120 camera I get an image at full resolution (binning 1x1) which is 4250W x 2838H pixels. The image scale is 1.2"/pixel. To sharpen the lunar disk limb as much as possible I used a 5nm OIII filter.

Using GIMP2 software I measured the lunar disk to be 1682 pixels across the equator. This represented an angular distance on the sky of 2018.4". Converting that to arc minutes gives 33.64. Checking online the apogee full Moon has an apparent diameter of 29.6 arc minutes while the perigee full Moon was given as 33.66 arc minutes.

https://www.astrobin.com/324978/?nc=user

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TMB152;Tak TOA150/FSQ106ED;Lunt LS152T/LS60THa;Orion 16" Dobsonian;Meade 14" LX200GPS
Canon 5DmkIII;DMK 21AU618;ASI 120M
AP 1200GTO;EQ6 Pro


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 Post subject: Re: Perigee Moon
PostPosted: Thu Dec 07, 2017 5:41 pm 
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Joined: Fri Dec 03, 2004 9:58 pm
Posts: 3271
Location: Wellingborough
Lovely image. With the full-resolution pic I can almost reach out a feel the stony texture of the surface. And well done for the spot-on size estimate :)

regards,

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Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed


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