September 13th.

1 month 1 week ago #109420 by lunartic
September 13th. was created by lunartic
Hi all

A wonderful day turned into a wonderful night, weather wise.  It was so warm last night that I was observing wearing shorts and a t-shirt, this is the middle of September, after all.
I decided to hunt down some carbon stars, I started at 9.00 and wrapped it up at midnight, the Monday morning alarm would not be far off.
I started off in Lyra using the 120mm f/5 refractror.
T Lyr:  Dark orange in colour, it sits close to Vega, making it an easy find.  Looked to be 8th mag.
HK Lyr:  I saw this in the same low power field, 20X as T Lyr.  It is of similar magnitude, to me this looked a brighter shade of orange.
U Lyr:  This was very difficult to see, I estimated it to be 11th mag.  The colour was hard to make out, at 125X I thought I could see a dull orange colour.
I next moved into the next door neighbour, Cygnus.
AW Cyg:  Bright orange in colour, it makes a nice double with a nearby white star of similar magnitude, about 7.5.
TT Cyg: Similar to AW in colour and magnitude, this sits in a busy star field.
AX Cyg:  Orange in colour, 8.5 mag.  Makes a nice triangle with a pair of white stars.
SV Cyg:  Very dark orange, almost red, sits with a close white star near the star Omicron 2 Cygni.
RY Cyg:  A faint orange star in a crowded star field, this 10th mag. star forms an isosceles with a pair of similar mag. stars
RS Cyg:  Bright orange, sitting close to Sadr, this is in a very crowded field, the colour makes it pop out from its neighbours.
U Cyg:  Dull orange 7th mag. star, a 6th mag. white stars is a close companion.  Located close to Omicron 2 Cygni.
V Cyg:  The standout star of the night.  This star is a beautiful shade of deepest red, a true drop of blood on a black cloth.  This is what carbon stars are supposed to be.
CY Cyg:  Sitting close to Deneb, this bright orange carbon star glows at 8th mag.
V460 Cyg:  Obvious, even at lower magnitudes, this bright orange 6th mag. star pops out from its white neighbours.
RV Cyg:  Dull orange 7th mag. star that sits in a pretty field of stars close to 79 Cygni.

I see many carbon stars as orange, and I was wondering if this had something to do with the way I perceive colour or as a consequence of using a fast refractor.  Looking online, I was relieved to read that carbon stars range from pumpkin orange to deep red.  Thankfully, that was solved.

14 in one night, not bad.


Programming today is a race between software engineers striving to build bigger and better programs, and the universe trying to produce bigger and better idiots. So far, the universe is winning.

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The following user(s) said Thank You: michael_murphy, flt158, Until_then-Goodnight!

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1 month 1 week ago - 1 month 1 week ago #109422 by Until_then-Goodnight!
Replied by Until_then-Goodnight! on topic September 13th.
Hi Paul,

Superb report! Your description of each star is great, and it was interesting to read the range in colour of carbon stars varies - great stuff!

Clear skies,

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1 month 1 week ago #109426 by flt158
Replied by flt158 on topic September 13th.
Congratulations on observing 14 carbon stars in 1 night, Paul. 
You are sure to pass me out!
Great colour descriptions too.  
Thankfully I have observed those 3 carbons in Lyra.
T Lyrae was the very first carbon star I observed back in December 2000. 
The ones I have seen in Cygnus are: AX Cygni, U Cyg and V460 Cyg. 
Altogether I have observed 85 carbon stars. 

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

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