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Astrophotography and Sketching >> Sketching

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Michael11
sage


Reged: 06/24/06

Loc: Israel
Sirius B
      #5473178 - 10/16/12 11:56 AM Attachment (173 downloads)

Hello all,

I've managed to observe Sirius B for the first time. It was clearly visible, probably due to it's increasing 11 second separation. During my previous attempts I usually had to use some imagination, in order to notice anything.

Date: 12 sep 2012. Telescope: Skywatcher 250mm F/5 Newtonian on EQ6, 6mm TMB planetary eyepiece (200X). Seeing ~6/10. NELM 6.5.


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Matt Lindsey
sage
*****

Reged: 06/06/08

Loc: Baltimore, MD, U.S.A.
Re: Sirius B new [Re: Michael11]
      #5473321 - 10/16/12 01:29 PM

That is just awesome and a fine sketch. It's on my list again for this winter especially with the separation going up. Did you need an occulting bar, or just go straight at it?

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Michael11
sage


Reged: 06/24/06

Loc: Israel
Re: Sirius B new [Re: Matt Lindsey]
      #5473607 - 10/16/12 05:00 PM

No bars, that's why I got excited. It was clearly visible with direct vision - just like in the "zoomed" region on my sketch.
By the way when I used a more quality LVW 5mm eyepiece - it produced too many ghosts (secondary images) to see anything. Surprisingly the cheaper TMB 6mm produced almost no ghosts (apart from one big out of focus one)


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Michael & Louise
super member


Reged: 06/02/08

Loc: Calgary, Alberta
Re: Sirius B new [Re: Michael11]
      #5473636 - 10/16/12 05:15 PM

That's quite the feat... like the sketch too.

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Achernar
Postmaster
*****

Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: Sirius B new [Re: Michael11]
      #5473795 - 10/16/12 06:44 PM

Good job on the drawing and finding the white dwarf, even when near maximum separation, seeing, mediocre optics and scatter in the eyepiece can and do hide it from view. In 25 years or so, it will be impossible to see at all in amatuer telescopes unless you have a very large one where the seeing is superb. I believe periastron or closest approach to the white hot primary star will occur around 2044, so you will want to watch this star often until it becomes too close to see again.

Taras


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Andrev
Post Laureate
*****

Reged: 02/08/11

Loc: Montreal, Quebec, Canada
Re: Sirius B new [Re: Michael & Louise]
      #5473799 - 10/16/12 06:45 PM

Michael 11

Oh wow. That is amazing and add me on the observing list for the next coming days. This is very spectacular. Your sketch is so terrific. Surely its a great challenge to find Sirius B.

Andre.

Edited by Andrev (10/17/12 05:16 PM)


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Andrev
Post Laureate
*****

Reged: 02/08/11

Loc: Montreal, Quebec, Canada
Re: Sirius B new [Re: Michael11]
      #5474107 - 10/16/12 09:57 PM

Michael.

I had a bit difficulty to understand why now Sirius B is easier to see. Nor Starry Night and Stellarium show Sirius B but Sky Tools pro 3 does. The coming years will be even better. Someone posted this graph to show Sirius B orbit and 2025 is the best year.



Andre.

Edited by Andrev (10/17/12 07:20 AM)


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phily
sage


Reged: 12/18/04

Loc: Kent, UK
Re: Sirius B new [Re: Andrev]
      #5474480 - 10/17/12 04:24 AM

Well done, Michael, and a great sketch too. As you say it is very elusive.
Phil


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Sirius B new [Re: phily]
      #5474634 - 10/17/12 08:26 AM

I remember seeing Sirius B last year. You did a fine job on sketching the glare and spikes

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mdowns
Carpal Tunnel
*****

Reged: 06/12/10

Loc: Englewood,FL
Re: Sirius B new [Re: Jef De Wit]
      #5475400 - 10/17/12 04:28 PM

Michael,
As always,another splendid sketch. Over the years I've never seen this companion. I better put this one on the list for the c11 this winter.


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niteskystargazer
Carpal Tunnel
*****

Reged: 10/05/09

Loc: 41-43'-28" N 87-42'-39" W
Re: Sirius B new [Re: Michael11]
      #5476780 - 10/18/12 11:33 AM

Michael,

Good sketch of Sirius B .

CS,KLU,

,

Tom


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Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Sirius B new [Re: niteskystargazer]
      #5477421 - 10/18/12 05:17 PM

Great sketch and observation of the Pup.
In the last two years, I've managed to see it with
my 4 inch APO refractor.


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Undermidnight
BEOTS "Tweener Cup" winner
*****

Reged: 05/25/04

Loc: Untermitternacht
Re: Sirius B new [Re: Rutilus]
      #5478492 - 10/19/12 09:58 AM

Very nice!! I love the color.

This sketch is another example why I enjoy view everyone's sketches. It reminds me of being at the eyepiece under the heavens.

Jason


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Michael11
sage


Reged: 06/24/06

Loc: Israel
Re: Sirius B new [Re: Undermidnight]
      #5479978 - 10/20/12 07:25 AM

Thanks again

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Chopin
Canis Insanus
*****

Reged: 02/03/05

Loc: In the doghouse.
Re: Sirius B new [Re: Michael11]
      #5486213 - 10/23/12 10:54 PM

Superb in every way! I agree that the color representation is excellent. I mostly enjoy the realism produced by the spider vanes. Wonderful.

Edited by Chopin (10/23/12 10:55 PM)


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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Sirius B new [Re: Chopin]
      #5486777 - 10/24/12 10:45 AM

Michael,

Always a treat to see the pup. Fine sketching.

Frank


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malatincia
newbie


Reged: 08/26/10

Loc: Chicagoland
Re: Sirius B *DELETED* new [Re: Michael11]
      #5493224 - 10/28/12 03:11 PM

Post deleted by malatincia

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Dennis_S253
Pooh-Bah


Reged: 11/22/11

Loc: West Central Florida
Re: Sirius B new [Re: malatincia]
      #5493642 - 10/28/12 08:18 PM

Nice catch

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azure1961p
Postmaster
*****

Reged: 01/17/09

Loc: USA
Re: Sirius B new [Re: Michael11]
      #5493657 - 10/28/12 08:24 PM

Thats an exquisite rendering. Beautifuly and faithfully executed.

Pete


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Michael11
sage


Reged: 06/24/06

Loc: Israel
Re: Sirius B new [Re: malatincia]
      #5494644 - 10/29/12 01:23 PM Attachment (18 downloads)

Quote:

This is weird, your sketch clearly shows nearby stars in the east-west configuration, based on that the pup should be in the east, so what you sketched is the opposite of where the pup is. Why hasn't anyone mentioned that yet?

Also true north is off, just look up sky-map.org. i have tried to view the pup, and have only seen a glimpse of what might be sirius b, i marked the dot on the attachment, but it does not seem to be in the right spot, so not sure.




I think you are mistaken. According to a chart from Andrev (for example) - Sirius B is east and slightly north from Sirius A. This is exactly how my drawing shows it.

I'm attaching a screenshot from Guide 9 software, of the same field of view. It's easy to compare with sketch.
Everything is in place, except maybe for a tiny difference in alignment with north.
This is a photo I found of this region - also quite easy to identifiy.
http://scienceblogs.com/startswithabang/files/2010/01/sir...


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