Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

A Carbon Star for beginners

  • Please log in to reply
6 replies to this topic

#1 flt158

flt158

    Vanguard

  • *****
  • topic starter
  • Posts: 2,250
  • Joined: 11 Aug 2014
  • Loc: Dublin, Republic of Ireland

Posted 12 January 2021 - 03:31 PM

Last Friday 8th January 2021, during the early evening, I set up my William Optics 158 mm F/7 apochromatic refractor and its accompanying WO 70 mm F/6 apo in freezing cold conditions in my back garden in Dublin, Ireland. 

There was a gentle breeze which was decreasing and eventually the temperature had decreased also to -6 degrees Celsius. Which meant no dew thankfully

I completely bumped into, by accident, one of the brightest carbon stars using my WO 70 mm at 11X.

The star is TX Piscium. 

At that power the star's orangeness was unmistakable. 

How different it is when compared to the surrounding stars which are nearby. 

Those other stars form the asterism the Pisces Circlet.  

It had been some years since I observed TX or 19 Piscium.

I first found it in 2001.   

It looked magnificent at 40X and 112x in the main scope on Friday 8th January 2021. 

I do very much consider TX Piscium as an ideal beginner's carbon star. 

It doesn't vary by much at all - from about 4.8 to 5.2 in magnitude. 

 

Astronomers aren't sure of its distance. 

It could be anywhere between 780 to nearly 1000 light years from our solar system. 

But never mind that! It's still a wonderful star. 

By the way its spectral class is C5II. 

Other designations include BD+02 4709, GSC 00589-01671, HD 223075, HIP 117245 and SAO 128374. 

The Right Ascension is 23h 46m 23.51 seconds. 

The Declination is +03 degrees 29 minutes 12.5 seconds. 

 

Therefore if any of you can observe this stunning carbon star during an early evening time of observing, you are certainly in for a New Year treat!!

 

Clear skies from Aubrey. 

 


  • Lewis Cason, DHEB, chrysalis and 7 others like this

#2 hambone20

hambone20

    Vostok 1

  • -----
  • Posts: 127
  • Joined: 12 Sep 2019
  • Loc: Oregon

Posted 21 January 2021 - 02:27 PM

Thanks Aubrey!  I wondered whether you could tell me where Hind's Crimson Star or R Leporis is within its 432 day period?  Next time out it's on my list.  Thanks


Edited by hambone20, 21 January 2021 - 02:30 PM.

  • flt158 likes this

#3 flt158

flt158

    Vanguard

  • *****
  • topic starter
  • Posts: 2,250
  • Joined: 11 Aug 2014
  • Loc: Dublin, Republic of Ireland

Posted 21 January 2021 - 02:57 PM

Hi Hambone 20. 

I used to be able to observe R Leporis. 

But sadly there are now trees getting in the way. 

 

And TX Piscium has gone behind the same trees too. 

 

I am not thinking about checking out some carbon stars in Taurus. 

Up to now I have observed Y, TT and TU Tauri. 

 

Very best regards from Aubrey.  



#4 KMAO

KMAO

    Explorer 1

  • -----
  • Posts: 57
  • Joined: 24 May 2020

Posted 22 January 2021 - 06:54 AM

To the "Eyes Full of Wonder"
minimum of R Lep will be about 20210609 (June 9)
and next maximum 20220125 (2022 January 25) .
Because R Lep is carbon LPV (long period variable)
allow up to 20 days tolerance both ways.
best regards
KMA

ps
interestingly
old charts do have period of 427days,
latest VSX have 445days.

Edited by KMAO, 22 January 2021 - 06:59 AM.

  • flt158 likes this

#5 Paul Sweeney

Paul Sweeney

    Messenger

  • -----
  • Posts: 456
  • Joined: 19 Feb 2018
  • Loc: Heidelberg, Germany

Posted 22 January 2021 - 01:51 PM

Good report, Aubrey! Makes me want to get out and observe carbon stars. Unfortunately, we've had nothing but clouds since before Christmas.
  • flt158 likes this

#6 hambone20

hambone20

    Vostok 1

  • -----
  • Posts: 127
  • Joined: 12 Sep 2019
  • Loc: Oregon

Posted 23 January 2021 - 12:57 AM

Thanks KMAO.  That's the info I was looking for.


  • flt158 likes this

#7 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Posts: 7,248
  • Joined: 18 Dec 2004
  • Loc: Glen Burnie (Maryland)

Posted 26 January 2021 - 03:31 PM

Years ago I remember observing TX Piscium with an 18" refl. It appeared a beautiful Pumpkin Orange color.


  • flt158 likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics