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Venus + double star

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4 years 4 months ago #108338 by flt158
Replied by flt158 on topic Venus + double star
 Hi Finbarr. Thank you for your question.

The list I got over on www.cloudynights.com is this one: 2343 Carbon stars brighter than Mag. 13 . 

Apologies it does not open on our website. I just copied and pasted it.  
A guy called Eric (Cildarith) sent it to me originally nearly one year ago in April 2019.
Of course the list is huge. 
And a lot of these carbon stars are not visible from Ireland at all for one reason or another. 
Some are too low and some are too faint. 
So I very slowly work my way through them. 

I simply pick a constellation and find the right ascensions and declination of that constellation using the list. 
For instance, Cancer ranges from 7 hours 55 minutes in RA to 9 hours 21 minutes. Declination ranges from +33 degrees north to +6 degrees north.
Needless to say I don't rush!!
I locate the star. Then print off a map using my Guide 9.1 DVD. 

But to answer your original question: to observe 100 would be nice. 
And It would be nice to find a decent carbon star as number 100. 

I haven't come across your list before. Not that I can remember. 
But all lists regarding these fascinating stars are always worthwhile. 

By the way, I don't think there are many more carbon stars for me to find in Cancer. 
There might be 2 or 3 more. 
But V Cancri appears to be far too faint right now according to www.aavso.org   

Clear skies to you, Finbarr. 

Aubrey. 
 
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4 years 4 months ago #108339 by Fermidox
Replied by Fermidox on topic Venus + double star
Excellent. Here is a table showing how many stars are visible down to each magnitude:

www.stargazing.net/david/constel/howmanystars.html

Then if we round off the number of stars above mag 13 we get some 12.5 million. So, fewer than 1 in every 5,000 stars is a carbon star!

Clear skies,
Finbarr.
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4 years 4 months ago #108343 by flt158
Replied by flt158 on topic Venus + double star
That is most interesting, Finbarr.
Thank you for your willingness to share these good facts with the rest of us.

Clear skies,

Aubrey.
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4 years 4 months ago #108371 by Fermidox
Replied by Fermidox on topic Venus + double star
And tonight Venus 2.2 degrees NW of Uranus. The 7th planet is 24 times more distant and 12,000 times fainter.



Finbarr.
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4 years 4 months ago #108373 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic Venus + double star
What a nice photo Finbarr. Thanks for sharing it with us. 

Clear skies, 

Darren. 
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