X Cassiopeiae and V778 Cassiopeiae

9 months 1 week ago #107904 by flt158
X Cassiopeiae and V778 Cassiopeiae was created by flt158
Last Saturday night (26th October 2019), I set up my usual apochromatic refractor in my back garden.
2 stunningly beautiful coloured single stars stand out: X Cassiopeiae and V778 Cassiopeiae.

Starhopping to X Cass is all part of the fun. It's good to start from 3.3 magnitude star Segin (Epsilon Cassiopeiae), and then head southwards to a bright slightly variable 7.0 magnitude star called V777 Cassiopeiae. There is no problem finding that star. Directly downwards, which is an easterly direction, I could see a sideways triangle of 3 faint stars. Their magnitudes are 10.7, 11.1 and 10.2. Below them is X Cassiopeiae. It is a carbon star and I found it to be faint but it has a strong orange colour. It does vary in magnitude - from as high as 9.0 down to 13.2. On this occasion, it was easy to estimate its magnitude. Despite a very different colour to the star (Hip 8980) above it, it has an identical 10.2 magnitude.
I have recorded that magnitude on www.aavso.org

Using my 2 degree 2 inch eyepiece which gives me 40X, I find in the same field of view another a unusually coloured star. V778 Cassiopeiae is every so slightly variable star. It is one of those strange K7 stars. Its standard magnitude is 8.3. I found it bright and a golden brown coloured star.

I did zoom through using magnifications 40X, 112X, 140X, 167X, 225X and 280X on both stars. They lose none of their colours at high powers.

X Cassiopeiae is my 73rd observed carbon star.
V778 Cassiopeiae is my 4th K7 star.

Thank you for reading.

Comments are always welcome.

Clear skies from Aubrey.
The following user(s) said Thank You: michael_murphy, scfahy, Until_then-Goodnight!

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