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Nu Canis Majoris

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#1 chrysalis

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Posted 25 January 2020 - 09:02 PM

Not sure I've ever observed this lovely double before. My eyes each perceive a slightly different set of hues: left eye = yellow and blue; right eye = amber gold and greyish-blue. Either way, an attractive colorful double!


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#2 flt158

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Posted 26 January 2020 - 08:57 AM

It most certainly is, Mark. 

It is a truly wondrous double. 

I don't seem to remember what colours I saw. 

It was nearly 10 years ago when I observed through my brand new William Optics 158 mm apo. 

 

Kind regards, 

 

Aubrey. 


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#3 c2m2t

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Posted 20 February 2020 - 01:50 PM

Hi All!

I don't think I am going out on much of a limb here but I am guessing we are talking about Nu1 CMa! I ask this because up until this post, I was not really aware of Nu's 1,2 & 3 in Canis Majoris...and just checking Sky Safari I see there is a mag 18.12 variable residing in NGC 2243 that is labelled NU CMa. Nu 1(aka SHJ 73) and Nu 3(aka HDS 915) are double stars while Nu 2 is a mag. 3.85 variable star. These 3 NU's make a very punchy trio in a 50mm finder scope just southwest of Sirius. 

 

Since they have not been added to the discussion yet, here is the data for Nu 1 CMa:

Stellar mags, A & B - 5.79 & 7.38, Separation 17.3 arc-seconds @ PA of 264 degrees.

Spectral class of the primary is G5III or yellow. This pair is physically bound.

 

I have added an image below!!

 

Cheers, Chris.

 

 

Attached Thumbnails

  • SHJ 73-8424-ns-ID.jpg

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#4 c2m2t

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Posted 20 February 2020 - 04:03 PM

Hi Mark!

Just checked your Clear Sky Chart. Appears you are in for a superb weekend of clear skies! Sigh.....!!! Too far to go on short notice! Enjoy your week-end. There should be another observing report in your future! Enjoy!!

Cheers, Chris.


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#5 chrysalis

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Posted 20 February 2020 - 05:30 PM

Hi Mark!

Just checked your Clear Sky Chart. Appears you are in for a superb weekend of clear skies! Sigh.....!!! Too far to go on short notice! Enjoy your week-end. There should be another observing report in your future! Enjoy!!

Cheers, Chris.

Been busy experimenting with a new SONY camera to get out the scope ;) !

 

I need to get a solid tripod for it...apparently... Nothing to post yet :( .



#6 fred1871

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Posted 20 February 2020 - 08:35 PM



...and just checking Sky Safari I see there is a mag 18.12 variable residing in NGC 2243 that is labelled NU CMa.

 

Cheers, Chris.

 

That one needs some kind of explanation, surely - on the face of it a rather weird labeling. 




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