wxsatuser Posted January 12, 2014 Share Posted January 12, 2014 Last night I messed about doing movies of the moon.After finishing with the moon I had a go at Castor.Set upSW 80ED Pro......Hyperion Zoom 24mm.......Canon 60Da......Movie crop mode.About a minute at 60fps aligned and stacked in Autostakkert. Link to comment Share on other sites More sharing options...
alan potts Posted January 12, 2014 Share Posted January 12, 2014 Very nice, I thought the two parts of Castor were more equally matched than the shot shows.Alan Link to comment Share on other sites More sharing options...
lunator Posted January 12, 2014 Share Posted January 12, 2014 Hi nice pic, I have to agree with Alan, the components seem a little far apart and too uneven.What magnification does your set up give?CheerIan Link to comment Share on other sites More sharing options...
wxsatuser Posted January 12, 2014 Author Share Posted January 12, 2014 Hi Guys.Could have sworn I was on it. I have'nt measured the exact distance from EP to sensor but I would think it is at least 60mm.My calculations with 24mm EP puts the ratio at F11 and magnifacation over prime is 1.5.Does that help. Link to comment Share on other sites More sharing options...
Stu Posted January 12, 2014 Share Posted January 12, 2014 It is interesting. I agree with the others that visually they look much more similar in brightness, and quite close together. Just check on SkySafari though and one is mag 1.6, the other b component is 2.9, so this is probably plenty to show up photographically?Will have a closer look next time.Stu Link to comment Share on other sites More sharing options...
wxsatuser Posted January 12, 2014 Author Share Posted January 12, 2014 Have to wait for the rain and cloud to go away to check. Link to comment Share on other sites More sharing options...
Moonshane Posted January 12, 2014 Share Posted January 12, 2014 I think you had it. the components do seem slightly different in size to me but I have never noticed colour. all the online images match yours quite well e.g. http://doublestarobserver.com/springtour.htmlhttp://www.backyard-astro.com/deepsky/041209/ds.htmlI suspect we'll all be looking a bit more closely next time out. I have seen them at this sort of separation at extremely high power (500x or more). Link to comment Share on other sites More sharing options...
lunator Posted January 12, 2014 Share Posted January 12, 2014 That's the beauty of doubles they always keep you guessing Not sure how to calculate the magnification on your set up but Moonshane could onto something with the very high mag. View.CheersIan Link to comment Share on other sites More sharing options...
chiltonstar Posted January 12, 2014 Share Posted January 12, 2014 I use Castor as a setting-up test fairly often. To me, this image is about how I see it in my Orion ED80 in terms of the relative brightness (I normally see the disks as about 60:40 size/brightness ratio), and the separation. I would expect to see them both fairly "white" though, and as sharper disks with diffraction rings when the seeing is good and I've found that elusive pin-sharp focus point....Chris Link to comment Share on other sites More sharing options...
Moonshane Posted January 12, 2014 Share Posted January 12, 2014 I also use Castor to check focus when looking for e.g. the pup as getting sharp focus off sirius can be challenging! still not seen the pup yet though. Link to comment Share on other sites More sharing options...
wxsatuser Posted January 13, 2014 Author Share Posted January 13, 2014 I use Castor as a setting-up test fairly often. To me, this image is about how I see it in my Orion ED80 in terms of the relative brightness (I normally see the disks as about 60:40 size/brightness ratio), and the separation. I would expect to see them both fairly "white" though, and as sharper disks with diffraction rings when the seeing is good and I've found that elusive pin-sharp focus point....ChrisMust admit I did the focus by eye but the image was jumping about all over the place, there was thin high cloud, seeing not to good.I think they are not white because I did'nt bother changing camera settings from the Jupiter run. Link to comment Share on other sites More sharing options...
Tinker1947 Posted January 19, 2014 Share Posted January 19, 2014 I put a Celsetron 6.3f FR on the C11, spaced at around 103mm so this is a image of Castor 30 seconds @ iso800, Focal Length 1764mm Link to comment Share on other sites More sharing options...
Moonshane Posted January 19, 2014 Share Posted January 19, 2014 I have just had a look and see them as slightly different sizes and with one slightly dimmer/dirtier white than the other so matches the image of the OP well. Link to comment Share on other sites More sharing options...
Tinker1947 Posted January 19, 2014 Share Posted January 19, 2014 My image is a bit blown due to the 30 second timing, it is mostly testing the Focal Reducer.......this other image is the 1100D attached to a Hyperion 13mm, 20 seconds @ 800 ISO, Focal Length 1764, it shows the colour of the other star better but hasn't had any processing. Link to comment Share on other sites More sharing options...
wxsatuser Posted January 20, 2014 Author Share Posted January 20, 2014 Had another go Sunday evening.Think I pushed the limit of this setup.Had the zoom on 8mm and added a 40mm extension between camera and EP.Seeing was very poor there was lots of cloud and I had smoke from a fire drifting across.The colour is not good....the image is full size, the result of a stack from Autostakkert.I now know for sure this is Castor as I took a still at normal resolution and all the stars line up. Link to comment Share on other sites More sharing options...
todd8137 Posted January 21, 2014 Share Posted January 21, 2014 Great double looks good to me Pat Link to comment Share on other sites More sharing options...
ely_ellis Posted January 28, 2014 Share Posted January 28, 2014 Another one I haven't got around to doing.Nice split MikeMartin Link to comment Share on other sites More sharing options...
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