stevecoe
Reged: 04/24/04
Posts: 2129
Loc: Arizona, USA
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Howdy all;
For my own use, I created a listing of the double stars in the SAC database that have a carbon star involved, either as part of the pair or in the field of view. I look forward to observing this list over the next year.
The problem is the word wrap, so pull this simple text file out of this message and turn off word wrap in your text editor and it will unfold. I then make some room to write in my observations and force a return at a convenient place to make it look good.
Enjoy;
Steve Coe
|CON|NAME |R.A. |DEC. |COMP|OTHER NAMES |Mag |Mag2|SEP |PA |NOTES |U2K|TIR|BSA|SAO |
|AND|SU And |00 04.7|+43 33| | |var.|13 |15 |280|CoCo; Primary is carbon star; mag var 8.0-8.5 |59 |4 |3 | |
|AND|STF 72 |00 54.6|+39 10| | |8 |9 |23.9 |178|CoCo; primay is carbon star; white companion |60 |4 |3 |54255 |
|AQL|UV Aql |18 58.5|+14 22| | |var.|11.7|20 |330|Primary is carbon star; mag var 11.1-12.4 |206|16 |7 | |
|CEP|STF 2844 |21 51.8|+64 53| | |7.2 |9.2 |11.9 |261|K0; Primary is carbon star; also SAO 19683 in field |33 |3 |2 |19687 |
|CET|12 Cet |00 30.1|-03 57| | |6.5 |11 |10.7 |197|Primary is carbon star; CoCo |216|10 |3 |128791|
|CMA|W CMa |07 08.0|-11 55| | |var.|12.8|158 |300|Primary is carbon star; mag var 6.4-7.9 |273|12 |4 | |
|CYG|STT 390 |19 55.1|+30 12|AB | |6.6 |8.9 |9.7 |22 |B9; Carbon star SAO 87932 in field |119|8 |7 |87932 |
|CYG|STT 422 |20 54.1|+45 06| | |7.9 |9.6 |2.6 |333|B9; In North Am Neb; Carbon SAO 50182 nearby |85 |9 |8 |50205 |
|CYG|RU Cyg |21 40.7|+54 19| | |7 |11.5|11.1 |224|Primary is carbon star; extremely red |57 |3 |2 |33654 |
|DRA|T Dra |17 05.4|+58 13| | |var.|11 |15 |165|Primary is carbon star; mag var 7.2-13.5; Compnaion is UY DRA|52 |3 |2 | |
|ERI|Gamma Eri |03 58.0|-13 30| |Zaurak |3.5 |11 |52.8 |242|Primay is carbon star |267|11 |3 |149283|
|LAC|15 Lac |22 52.1|+43 18| | |5 |11 |25.7 |144|Primary is carbon star;carb str SAO 52424 in field |88 |9 |8 |52436 |
|MON|RY Mon |07 06.9|-07 33| | |var.|10.4|20 |100|Primary is carbon star; mag var 7.5-9.2 |273|12 |4 | |
|OPH|South 694 |17 52.1|+01 07| | |6.6 |7.1 |81.8 |237|Bino pair; Carbon star SAO 122861 in field |249|15 |7 |122843|
|OPH|STF 2276 |18 05.7|+12 00| | |7 |7.5 |6.9 |257|Carbon star HIP 88593 in field |204|15 |7 |103373|
|PEG|STF 2850 |21 59.8|+23 56| | |7 |11 |2.8 |261|M3; Primary is carbon star |166|9 |8 |90155 |
|PEG|h 1721 |22 05.8|+29 55| | |8 |9.3 |11.2 |268|Secondary is a carbon star |122|9 |8 | |
|PEG|STF 2856 |22 05.9|+04 52| | |8.2 |8.8 |1.2 |195|Carbon star 22 Peg in field |256|17 |8 |127289|
|PEG|RZ Peg |22 05.9|+33 30| | |var.|12.3|15 |110|Primary is carbon star; mag var 7.6-13; Companion is RY PEG |122|9 |8 | |
|PEG|57 Peg |23 09.5|+08 41| | |5.1 |9.7 |32.6 |198|M; Y/W; Primary is a carbon star |213|17 |8 |128001|
|PER|STF 325 |02 55.8|+34 28| | |8.8 |10.3|15.8 |159|M0; Primary is carbon star |93 |4 |3 |56010 |
|PSC|STF 87 |01 05.5|+15 23| | |8.7 |9.4 |6.1 |207|Primary is a carbon star |172|10 |3 |92237 |
|PSC|h 647 |02 02.6|+07 36| | |9 |9.5 |26 |32 |CoCo; Carbon star SAO 110297 in field |174|10 |3 | |
|PYX|Kappa Pyx |09 08.0|-25 52| | |4.6 |9.8 |2.1 |263|M0; Primary is carbon star |322|20 |5 |177002|
|SCL|h 3377 |00 33.6|-26 06| | |7.5 |9.7 |20.1 |60 |Primary is a carbon star |306|18 |3 |166362|
|SCL|h 5429 |23 53.8|-29 23| | |7.5 |10.6|29.4 |226|K5; Primary is carbon star |350|23 |8 |19224 |
|SCT|S Sct |18 50.3|-07 54| | |7.5 |12 |14.4 |238|Primary is carbon star |295|16 |7 |142674|
|SGE|H N 84 |19 39.4|+16 34| | |6.5 |8.9 |28.2 |302|CoCo; O/B; Primary is carbon star |207|16 |7 |105104|
|SGE|X Sge |20 05.1|+20 39| | |var.|13.5|13 |248|Primary is carbon star; mag var 7.0-9.7 |163|9 |8 | |
|SGE|X Sge |20 05.1|+20 39| |BUP 203 (Beta pm) | |12.1|59 |104|Primary is carbon star |163|9 |8 | |
|SGR|h 5003 |17 59.1|-30 15| | |5.2 |6.9 |5.5 |106|CoCo; R/R; Primary is carbon star |377|22 |7 |209553|
|SGR|Eta Sgr |18 17.7|-36 46|AB | |3.1 |7.8 |3.6 |105|CoCo; Primary is a carbon star |377|22 |7 |209957|
|SGR|Eta Sgr |18 17.7|-36 46|AD | |3.1 |10 |93.2 |303| |377|22 |7 | |
|TAU|TU Tau |05 47.2|+24 25| | |var.|12.6|30 |135|Primary is carbon star; mag var 5.9-9.2 |136|5 |4 | |
|VEL|h 4330 |10 32.9|-46 59| |T Vel |5.1 |9 |40.3 |163|K4; Primary is carbon star |399|20 |5 |222136|
--------------------
150mm 6" f/8 Celestron Refractor on Sirius Mount
80mmED 3" f/7.5 Orion Refractor
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Carol L
Reged: 07/05/04
Posts: 5880
Loc: Tomahawk, WI 45N//89W
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Thanks Steve, this is great! 
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GeorgeNC
professor emeritus
Reged: 03/26/07
Posts: 826
Loc: Land of the Sky, North Carolin...
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You might want to add STF-2789 in Cygnus:
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Canon 40D (unmodded)
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Jeremy Perez
Carpal Tunnel
Reged: 08/12/04
Posts: 1668
Loc: Flagstaff, Arizona, USA
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Awesome, Steve! I'm going to have to try these out.
I didn't see V Hydrae (BU 1428) in there, so I'll throw that one out as a suggestion too. 
Thanks for sharing the list.
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stevecoe
Reged: 04/24/04
Posts: 2129
Loc: Arizona, USA
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Jeremy;
Thanks, I always look at V Hyd, every autumn. It is amazing and last year it was the reddest star I have ever seen. I keep forgetting that it is a double star, I will have to put that in. It is always reddest when it is at its faintest.
Clear skies;
Steve Coe
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150mm 6" f/8 Celestron Refractor on Sirius Mount
80mmED 3" f/7.5 Orion Refractor
Author "Deep Sky Observing" Springer-Verlag
Author "Nebulae and How to Observe Them" Springer
New Canon Xt astrocamera with Hutech modification
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Jeremy Perez
Carpal Tunnel
Reged: 08/12/04
Posts: 1668
Loc: Flagstaff, Arizona, USA
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Yeah, it was pretty fresh in my mind since Boattini buzzed it back in May. That's one hot pixel.
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Catapoman
professor emeritus
Reged: 06/06/03
Posts: 684
Loc: VA
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For those that like slicing and dicing data, I've converted this list to an Excel file. BTW, great list Steve. 
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Pernel
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GlennLeDrew
professor emeritus
Reged: 06/18/08
Posts: 608
Loc: Ottawa, Ontario, Canada
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Not having a double star reference handy here at work, I can't say (after a *brief* scan) if either of RS Cyg or WZ Cas are in your list, Steve. Every year I check these two out, especially the latter, for their strong color contrast.
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stevecoe
Reged: 04/24/04
Posts: 2129
Loc: Arizona, USA
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Here is the info on WZ Cas, I don't have a note that says it contains a carbon star, but it is in the SAC red stars database and the CCCS, so it obvious is a carbon star. I will have to fix that.
Steve Coe
|CAS|WZ Cas |00 01.2|+60 21| |STT 254 |7.6 |8.7 |58.1 |89 |CoCo; O/B |35 |1
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150mm 6" f/8 Celestron Refractor on Sirius Mount
80mmED 3" f/7.5 Orion Refractor
Author "Deep Sky Observing" Springer-Verlag
Author "Nebulae and How to Observe Them" Springer
New Canon Xt astrocamera with Hutech modification
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RLTYS
Carpal Tunnel
Reged: 12/18/04
Posts: 1740
Loc: New York (Long Island)
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Quote:
Not having a double star reference handy here at work, I can't say (after a *brief* scan) if either of RS Cyg or WZ Cas are in your list
Is RS Cyg a double Sar? I know WZ Cas is considered one.
Clear Skies.
Rich (RLTYS)
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50mm F12 Refr. (Tasco #6TE-5)
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acafar
member
Reged: 06/17/06
Posts: 57
Loc: Madrid, Spain
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In http://www.astrocomplutense.es/dobles/redDoubles.pdf can be found the list with the WDS pairs such that:
- Are separated by more than one second
- The two components have magnitudes less than 10
- At least one of the components have spectral type M, N or C
I think that this list complements the very useful list posted by Steve, which I have already printed.
Cheers,
Rafa
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Rafa
Vixen 4" Sf f/9,Scopos 2.5" f/6
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danm
sage
Reged: 04/27/08
Posts: 231
Loc: Northern California
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Great list thanks! I love carbons and doubles, this will be fun.
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stevecoe
Reged: 04/24/04
Posts: 2129
Loc: Arizona, USA
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Danm;
That is the reason I put the list together, post your observations and we can compare.
Clear skies;
Steve Coe
--------------------
150mm 6" f/8 Celestron Refractor on Sirius Mount
80mmED 3" f/7.5 Orion Refractor
Author "Deep Sky Observing" Springer-Verlag
Author "Nebulae and How to Observe Them" Springer
New Canon Xt astrocamera with Hutech modification
|
acafar
member
Reged: 06/17/06
Posts: 57
Loc: Madrid, Spain
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Hi,
Two days ago I observed STT 547 in Andromeda, coord.: 00 05 41.03 +45 48 43.3, mag. A: 8.98, B: 9.15, PA: 188º and sep.: 6.0".
It is an interesting pair formed by two read stars (K and M). Clear split at 45x in a refractor 4" f/9, the best image at magnification 160x. The effect of the two red stars together is weird, something I'd never seen before. I was looking at the pair several minutes, astonished by its very particular beauty. The components are oriented almost N-S, although at first I thought that the primary was the star at the south, which is more reddish than the golden north primary.
I have read later that it is a physical pair sharing proper motion. There is another component which is also physically attached at 327". The following animation shows the motion of the system in two plates separated by almost 50 years:
The central star is the AB pair (which is not split in these plates) and at the star at the right is the F component.
Cheers,
Rafa
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Rafa
Vixen 4" Sf f/9,Scopos 2.5" f/6
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acafar
member
Reged: 06/17/06
Posts: 57
Loc: Madrid, Spain
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Another double "red" star in Andromeda: STF 72, from Steve's list above.
Easy to find at the North and slightly West of Mu And. In fact I see Mu and STF 72 in the same FOV at 25x. There are a few stars of similar magnitude and two of them seem double, but STF 72 is easy to distinguish: the red one.
At this low magnification it looks like a orange-red star with a pale (white?) companion. At 45x and above however something surprising happens: now is the secondary which looks darker and the primary yellow, as they had interchanged the roles.
Leaving apart my old eyes, I only can explain this change in a way: the primary is red and is the star that dominates the image at 25x. The secondary at this magnification is too weak and its color difficult to notice. With greater magnification the secondary color becomes apparent and now the primary looks yellow by contrast.
Anyway double star colors are subjective, but it is the first time I observe a change of colors depending on the magnification!
Cheers,
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Rafa
Vixen 4" Sf f/9,Scopos 2.5" f/6
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asteroid7
Post Laureate
Reged: 10/19/04
Posts: 3716
Loc: CT
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I also have observed color differences on the same star using different magnitudes, especially low and high power. I even sometimes see different magnitudes when putting the star out-of-focus and in-focus
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asteroid7
Post Laureate
Reged: 10/19/04
Posts: 3716
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I see STF 72 with the primary as medium orange and the
secondary as a darker orange.
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Clear Nights "Make My Day"
4.5" f/7 APM (TMB) APO Refractor on CG5 GoTo with Orion extension tube w/2" WO diagonal
5" Celestron Nexstar
8" Celestron Nexstar (8Ni)
8" Celestron CPC
Eyepieces:
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2.5 Tele Vue Powermate
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RLTYS
Carpal Tunnel
Reged: 12/18/04
Posts: 1740
Loc: New York (Long Island)
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Quote:
I also have observed color differences on the same star using different magnitudes, especially low and high power. I even sometimes see different magnitudes when putting the star out-of-focus and in-focus
I've had a similar experience with STF 1669 Corvus. At 76x primary appears yellow with the secondary appearing blue. At 174x both stars appear pale yellow.
Clear skies.
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr.
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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stevecoe
Reged: 04/24/04
Posts: 2129
Loc: Arizona, USA
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Rafa-great list, thanks. Now we have plenty of neat red stars to observe we just need the clouds to go away and get some observing time.
I don't remember changing magnification and seeing the colors change that much, but I can see where that could happen as you change the background and change the contrast with the sky. Interresting, I will have to try that.
Clear skies to us all;
Steve Coe
--------------------
150mm 6" f/8 Celestron Refractor on Sirius Mount
80mmED 3" f/7.5 Orion Refractor
Author "Deep Sky Observing" Springer-Verlag
Author "Nebulae and How to Observe Them" Springer
New Canon Xt astrocamera with Hutech modification
|
GeorgeNC
professor emeritus
Reged: 03/26/07
Posts: 826
Loc: Land of the Sky, North Carolin...
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Looking back through some sketches, I noticed STF-1469 In UMa fits this category:
--------------------
Meade 10" LX90 OTA mounted on CGE
Stellarvue 80mm Nighthawk II
Celestron CG-5
Canon 40D (unmodded)
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