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Observing >> Double Star Observing

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Tyranthrax
sage


Reged: 04/22/13

Loc: Tampa, FL
Polaris new
      #5855612 - 05/12/13 02:30 PM Attachment (59 downloads)

So I started messing with Astrophotography and I thought what hte heck, why not try to get some doubles they look really neat I think. So I stacked the video and cleaned up the photo a bit. Before I label them, I want to make sure I label it correctly. I am pretty certain that the large star is Polaris A Is the smaller one Polaris B (I think it is) or is it AB?

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Bonco
Post Laureate
*****

Reged: 04/17/06

Loc: Florida
Re: Polaris new [Re: Tyranthrax]
      #5855764 - 05/12/13 03:32 PM

The dimmer star would be Polaris B. Nice picture.
Bill


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Tyranthrax
sage


Reged: 04/22/13

Loc: Tampa, FL
Re: Polaris new [Re: Bonco]
      #5855772 - 05/12/13 03:35 PM

Thanks for the help Bill, I wasn't exactly sure. I'm pretty amateur with the photos, but this community has been the single greatest source of inspiration and advice! thank you all!

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Gregg Carter
member


Reged: 08/11/10

Loc: Northern New Mexico
Re: Polaris [Re: Tyranthrax]
      #5863597 - 05/16/13 12:35 AM

Nice photo, Tyranthrax.

What equipment did you use?


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Tyranthrax
sage


Reged: 04/22/13

Loc: Tampa, FL
Re: Polaris new [Re: Gregg Carter]
      #5882825 - 05/24/13 06:17 PM

sorry I missed your question Greg, I kinda forgot the thread. Iuse a celestron 6se and an orion starshoot deep space imager II I'm really new at AP and am hopefully learning alot. I had no idea where to start and got bit when my wife held her iphone up to the eyepiece and was like OMG I want to do that. I know what direction I want to go with equipment in the future.

Since this shot I've learned how to adjust the camera much better to draw out the colors and just over all better pictures.


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Gregg Carter
member


Reged: 08/11/10

Loc: Northern New Mexico
Re: Polaris new [Re: Tyranthrax]
      #5883328 - 05/25/13 12:07 AM

No worries, T. I appreciate the response.

Did you capture the image in Alt-Az mode?


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Gregg Carter
member


Reged: 08/11/10

Loc: Northern New Mexico
Re: Polaris new [Re: Gregg Carter]
      #5883380 - 05/25/13 12:54 AM

Okay, with this camera:

http://www.telescope.com/catalog/product.jsp?productId=101920&gclid=CMDcx...

I understand better now how you got the image.

Keep going!


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StarDusty
sage


Reged: 10/02/07

Loc: Parsippany, NJ
Re: Polaris new [Re: Gregg Carter]
      #5883580 - 05/25/13 08:24 AM

I have been imaging doubles with webcam type cameras too. I compiled a list of webcam-able doubles that match my low cost webcam's sensitivity and small telescope light gathering. Go here for the list:


http://www.clearskyobserver.com/index.php/22-doublestar/10-double-star-plates

If you are interested in viewing some of my webcam images of these doubles go here:

http://www.clearskyobserver.com/index.php/new-article/22-doublestar/16-measur...

Edited by StarDusty (05/25/13 08:29 AM)


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Svezda
scholastic sledgehammer


Reged: 06/01/07

Loc: Texas
Re: Polaris new [Re: StarDusty]
      #5917708 - 06/12/13 08:56 PM

By the way, I've noticed for a few years that Polaris is /obviously/ just a little bit dimmer than Beta UMi (Kochab). I look at these almost every clear night and to my eyes they are very close but still not too hard to see that Kochab is a bit brighter. This is even when they don't differ too much in altitude. Polaris is variable but with a very small range, not enough to be obvious naked eye, obviously.

Polaris is listed as 2.02m, Kochab at 2.07m - a 1/20th mag difference. You'd think that they would look exactly the same brightness to the unaided eye.

Has anyone else noticed Kochab as seemingly the brighter of the two?


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brianb11213
Postmaster
*****

Reged: 02/25/09

Loc: 55.215N 6.554W
Re: Polaris new [Re: Svezda]
      #5918356 - 06/13/13 08:42 AM

Quote:

Polaris is listed as 2.02m, Kochab at 2.07m - a 1/20th mag difference. You'd think that they would look exactly the same brightness to the unaided eye.

Has anyone else noticed Kochab as seemingly the brighter of the two?



They do look very similar in brightness to me.

There is however a noticeable difference in colour - Kochab being much redder. Peoples' eyes differ in response to red light & it is not unusual to find a spread of over a magnitude in visual estimates of red stars made against comparison stars of a more neutral colour.


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Svezda
scholastic sledgehammer


Reged: 06/01/07

Loc: Texas
Re: Polaris new [Re: brianb11213]
      #5919269 - 06/13/13 06:14 PM

Brian, thanks for your reply - that's a possibility and I look forward to other opinions, if there are any.

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Nucleophile
super member


Reged: 05/24/13

Loc: United States
Re: Polaris new [Re: StarDusty]
      #5919410 - 06/13/13 07:34 PM

Quote:



If you are interested in viewing some of my webcam images of these doubles go here:

http://www.clearskyobserver.com/index.php/new-article/22-doublestar/16-measur...




cool site; thx for sharing.


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