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Zeta Cancri - I Did It!

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#26 evan9162

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Posted 28 March 2015 - 11:12 PM

Tried with my C80ED tonight at about 160x.  A-B was elongated visually.  

 

Also threw my camera on - currently processing the video capture.



#27 karstenkoch

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Posted 28 March 2015 - 11:33 PM

Tried with my C80ED tonight at about 160x. A-B was elongated visually.

Also threw my camera on - currently processing the video capture.

Do post the pic whether success or not.

Curious to see what an 80 can do.

Edited by karstenkoch, 28 March 2015 - 11:33 PM.


#28 evan9162

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Posted 28 March 2015 - 11:50 PM

Here it is

 

C80ED, Orion 2x barlow, with extension tubes (maybe 2000mm FL?), ISO1600, 15fps, 1200/2500 frames

 

Zeta Can C80ED_sharp.jpg

 

Elongation on the A-B pair, but no indication of separation.  Understandable, since at 1.1", about 120mm of aperture is required to indicate separation.  The Dawes limit for 80mm is about 1.6".

 

 



#29 chrysalis

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Posted 29 March 2015 - 08:01 AM

I also recently conquered this using about 300X in my 12" with my right eye on a night that was very very steady.



#30 Karl Fabian

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Posted 30 March 2015 - 08:03 PM

Last time I visited the triple star Zeta Cancri  was back in 2004 utilizing my trusty old 5 inch  F9.3 achro refractor.  My notes indicated excellent seeing with all  three stars obvious at first glance. A-B well divided at 295X and even better at 328X. In 2004 it was at .96" The most recent WDS data for A-B is 1.1". It will continue to widen. Going to revist this tight double when seeing permits.

 

Karl


Edited by Karl Fabian, 30 March 2015 - 08:03 PM.


#31 evan9162

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Posted 03 April 2015 - 05:16 PM

Another view, this time with a mid-80s Meade 2120 OTA with mediocre optics.  

Attached Thumbnails

  • Zeta Cancri 2120_sharp.jpg


#32 Starman81

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Posted 16 April 2015 - 10:40 AM

First time observation this past weekend... Above average seeing with the 8" dob at 150x, 200x showed elongation but not a clean split of the AB pair. The seeing was great that night for our parts, but it was relatively low in the sky at the time of the observation, only 24.5° high. I think if I would have tried earlier in the night I would have split it successfully. 



#33 Rutilus

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Posted 22 April 2015 - 01:45 PM

Observing last night with a 100mm aperture mask fitted to my 6inch f/15
refractor, had a good split of the A-B pair at 400x.
Observing without the mask, and at full aperture, the pair were an easy split.


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