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Observing >> Double Star Observing

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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Double Star Photos with the TEC 200 new
      #5878277 - 05/22/13 02:56 PM Attachment (48 downloads)

I thought about sticking these in the DSLR photography forum but - too bad for them!!!

Four double stars imaged with the TEC 200mm Mak/Cass at prime focus (3100mm) and a Canon 60Da in movie mode, 640x480crop, ISO400. Each movie was about 45sec. to 1 minute long in moderate seeing - 2 or 3 out of 5 at the Texas star party.

I used LYNKEOS aligning and stacking software which runs natively on my MacBook. After aligning the frames I selected the best 100 or so frames for stacking. No other processing was done.

I think the results are encouraging....

First, Mizar, (Zeta UMa), Mags 2.06 and 3.95, sep 14", PA 150 deg.


Alright, get on with it, Cotts!!!!

Edited by Cotts (05/22/13 02:59 PM)


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5878285 - 05/22/13 02:58 PM Attachment (38 downloads)

Now Izar, quite a bit closer and more difficult...

Mags 2.26 and 4.65, Sep. 2.6", PA 163


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5878294 - 05/22/13 03:01 PM Attachment (32 downloads)

How about Lambda Oph!?!

Mags 4.16 and 5.22, Sep 1.4", PA 40deg


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5878301 - 05/22/13 03:03 PM Attachment (33 downloads)

Last one, Xi Sco AB

Mags 4.15 and 6.56, Sep 1.0", PA 1deg


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5878314 - 05/22/13 03:07 PM

I'm pretty sure the image scale is the same in each case but the PA/orientations are all over the place because I was altering imaging with visual observation and I took no care to have the camera on the same way each time.

The Xi Sco shot was taken at an altitude of 30 degrees so there is some chromatic dispersion seen....

Thanks for looking.

Dave


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R Botero
Pooh-Bah


Reged: 01/02/09

Loc: Kent, England
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5878721 - 05/22/13 05:57 PM

Great shots Dave. Colours are very nice also. Thanks for sharing.

Roberto


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Ed Wiley
scholastic sledgehammer


Reged: 05/18/05

Loc: Kansas, USA
Re: Double Star Photos with the TEC 200 [Re: R Botero]
      #5879997 - 05/23/13 11:09 AM

Great shots Dave. I assume these are from the TSP. If so, they are all the more impressive as seeing was not that great. Your TEC is a great double star scope.

Ed


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Double Star Photos with the TEC 200 new [Re: Ed Wiley]
      #5882604 - 05/24/13 03:58 PM

Hi, Ed. Yes these were the ones from TSP. I have your voice on the original videos to prove it.....

My observatory in Toronto is 99% ready to go. I have to wait for a clear night to do a polar align, including drift.

Next are the magnitude versus ISO speed tests to see my magnitude limit with the 60Da.

Question: I can use REDUC in the comfort of my living room by loading the videos in after the fact, can't I?

Dave


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Ed Wiley
scholastic sledgehammer


Reged: 05/18/05

Loc: Kansas, USA
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5882866 - 05/24/13 06:35 PM

Hi Dave:

I am not sure about video conversion from a 60Da. My DMK21 requires conversion using Veedub64 into *bmp frames before I load them into REDUC. I think the kinds of video you can directly input into REDUC is limited by Florent's desire not to spend all his time trying to keep up with changing video formats. So...you will have to investigate.

Glad to hear your observatory is almost finished. I am still dealing with all the data I collected at the TSP. Its a fun sort of "dealing." My 0.6" pairs are not quite separated enough for good measures, I need to go to F50.

Clear skies and good measures to you!

Ed


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WRAK
Pooh-Bah


Reged: 02/18/12

Loc: Vienna, Austria, Europe
Re: Double Star Photos with the TEC 200 new [Re: Ed Wiley]
      #5884421 - 05/25/13 05:42 PM

Dave, would hate "my" bad weather even more if I had such a great scope available. Hope you use it also for visual observing, seems kind of waste to use it for astrophotography.
Wilfried


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Double Star Photos with the TEC 200 new [Re: WRAK]
      #5884849 - 05/25/13 11:32 PM

Well, Wilfried, the videography/photography is intended to measure the separation of double stars for eventual publication in a scientific journal. Not exactly wasted.....

I'll still do some visual observing of double stars from the city with the TEC as well as with the 16" Teeter when I am under dark skies.

Dave


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WRAK
Pooh-Bah


Reged: 02/18/12

Loc: Vienna, Austria, Europe
Re: Double Star Photos with the TEC 200 new [Re: Cotts]
      #5885156 - 05/26/13 06:24 AM

Excuse the improper wording - any activities to eliminate errors in the WDS catalogue are highly appreciated. I try to contribute with rather unscientific reports on crass magnitude errors.
I just misinterpreted "TEC 200" for the APO and assumed that while high quality refractors are top choice for visual observing there are better alternatives for astrophotography costing less - but now I see that you use anyway a Mak. Sorry for this misunderstanding and congratulations to your excellent images.
Wilfried


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Scott in NCAdministrator
80mm Refractor Fanatic
*****

Reged: 03/05/05

Loc: NC
Re: Double Star Photos with the TEC 200 new [Re: WRAK]
      #5886353 - 05/26/13 11:08 PM

Nice pics, Dave--thanks for sharing them!

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Asbytec
Guy in a furry hat
*****

Reged: 08/08/07

Loc: La Union, PI
Re: Double Star Photos with the TEC 200 new [Re: Scott in NC]
      #5886449 - 05/27/13 12:51 AM

Dave, I'm happy for you. Nice scope.

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Ed Wiley
scholastic sledgehammer


Reged: 05/18/05

Loc: Kansas, USA
Re: Double Star Photos with the TEC 200 new [Re: Asbytec]
      #5886910 - 05/27/13 11:28 AM

Dave:

I was so hung up on the video format question, I forgot the rest. Here is what I do.

1. Capture the video (since I use a computer its on the hard drive).
2. Backup the video on a portable HD
3. Transfer the video to the desktop HD.
4. Analyze the images at home, beer optional.
5. Erase the images from the laptop, keeping duplicate copies on the portable HD and the desktop HD.
6. One published I keep an archive copy of the video only to save space.

One other thing, I would get a battery adapter so you can run all night.

Good measures, Ed


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