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Please, Help. Is it Sirius B?

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#1 Urdaneta

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Posted 24 December 2014 - 10:59 AM

Hi, everyone!
Please, I wish to confirm if it is Sirius B or not. Link below:
http://www.cloudynig...85606-sirius-b/
Moreover I had sent 4 pictures. In Sirius3 looked at a blue dot. That I identified as Sirius B.
In 06/03/2014 I captured Antares B with this same telescope 114/900.
http://www.skyandtel...nd-your-fellow/

Thanks for helping
Edison
P.S. Happy Holidays.

Sirius1.JPG

Sirius2.JPG

Sirius3.JPG

Sirius4.JPG

 



#2 Bonco

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Posted 24 December 2014 - 04:31 PM

The enlarged image looks rather convincing.

Bill



#3 Rich (RLTYS)

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Posted 25 December 2014 - 08:08 AM

On your images, which way is north?

 

Rich (RLTYS)



#4 Bonco

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Posted 25 December 2014 - 02:42 PM

A better question would be "which way is east."

Bill



#5 Ed D

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Posted 26 December 2014 - 09:23 AM

The enlarged image looks rather convincing.

Bill

 

+1  Although much brighter in your enlarged image, it looks similar to what I have observed.

 

Ed D



#6 Urdaneta

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Posted 26 December 2014 - 09:49 AM

Hi, All!
It was very high. But position was ES toward S.
Thank you very much, to all.
Edison
Clear skies

P.S. Happy New Year 2015.



#7 Bonco

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Posted 26 December 2014 - 05:06 PM

Hi, All!
It was very high. But position was ES toward S.
Thank you very much, to all.
Edison
Clear skies

P.S. Happy New Year 2015.

Can be hard to determine direction on a image. But if you are sure the secondary was ES toward S, then it's not the Pup. The Pup is just shy of east if my memory serves me. It follows Sirius in a non tracking telescope.

Bill



#8 Urdaneta

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Posted 27 December 2014 - 09:51 PM

Hi, Bill!
Location approximate. I used Stellarium.
Edison
Clear Skies
Sirius_B_EnlargedD.JPG?lgfp=3000



#9 Asbytec

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Posted 29 December 2014 - 09:06 PM

The pup is due east, not west. Are your cardinal directions reversed? As mentioned, that looks like a promising image, but the Pup should be due east drifting behind Sirius.



#10 Urdaneta

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Posted 30 December 2014 - 10:55 AM

Conclusion. It´s not Sirius B (the pup).
Happy New Year 2015 for all.
Edison
Clear skies



#11 Bonco

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Posted 30 December 2014 - 04:42 PM

Well.....If you look at the diffraction spike pointing east, there is a little bump of light in it.

Who knows?

Bill



#12 Urdaneta

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Posted 31 December 2014 - 10:26 AM

Hi, Bill.

Yes, I see it. I don´t know.

Edison

Clear skies



#13 jsmoraes

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Posted 31 December 2014 - 02:23 PM

The orbit of Syrius A and B in 2014-2015 is about 10 arcsec of separation.

http://en.wikipedia....us_B_arcsec.png

 

My 305 mm with focal length of 1700 mm and Canon 1100D has about 0,7 arcsec/px. With some refraction we can think in 1,arcsec/px.
Therefore it needs at least 10 pixels of separation between Sirius A and B. Very difficult to me capture those stars with good visibility each one.

 

What was your resolution in arcsec/px ?

 

Reflector 114, focal length 900 mm and Canon ... If it is Canon 1100D, 1.20 arcsec/px, therefore with perfect seeing 8 pixels for 10 arcsec ... I don't believe you can resolve that binary system. Your set of equipment, with a normal refraction should have resolution of 2 arcsec/px, so 5 pixels for 10 arcsec. This, 5 pixels, should be almost the diameter of Syrius A.

 

I am not talking about brightness or magnitude. I am talking about resolution in arcsec/px.

 

See, a similar separation. I got with very good seeing. I read that you used barlow 2x, so with it ... maybe ... your resolution would be 0,60 arcsec/px theoretical... I prefer think about 1 arcsec/px with normal refraction.

http://astronomia-e-...uel_A_BC_3x.jpg

 

You can measure your actual resolution with Photoshop. Use a well known distance between two stars, find your real arcsec/px and see if it is compatible with the Syrius image.

 

Some other examples you can see here: http://jsmastronomy....System-f50.html


Edited by jsmoraes, 31 December 2014 - 02:57 PM.


#14 aa6ww

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Posted 15 January 2015 - 10:54 AM

It looks much too large to be the pup. The pup is a tiny tiny dot compared to brilliant Sirius.

...Ralph

#15 Urdaneta

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Posted 15 January 2015 - 11:46 AM

Thanks, Moraes and Ralph.

Edison

Clear skies



#16 Urdaneta

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Posted 16 January 2015 - 08:27 AM

In definitive, it is not Sirius B. But there is a question:
What is blue dot or spot?
Edison
Clear skies



#17 Bonco

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Posted 16 January 2015 - 05:37 PM

Reflection?

Bill



#18 Urdaneta

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Posted 18 January 2015 - 12:12 PM

Hi, Bill!

If it´s reflection: Why is it only on the third picture (Sirius3) and not in everyone of them?

Edison

Clear skies




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