Brett's Carbon Star Hunt - April/May 2022

Brett's Monthly Carbon Star Hunt Challenge

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Brett's Carbon Star Hunt - April/May 2022

#1

Post by KingNothing13 »

Hi all - returning for a 2 month hunt this time around as mentioned previously. I've included 4 targets, one is a repeat from March 2021 - it is a great target though, so if you go looking for it, the effort will be worth it.

Enjoy! All text taken from SkySafari.

HD 113801: +8.50

HD 113801 is a 8th magnitude Star appearing in the constellation Virgo. It is 2118 light years from our solar system. It is a orange giant of spectral type K0IIICNIab. Its surface temperature is 4660 Kelvins - 19% cooler than the Sun's - and it is 22.3 times the Sun's diameter in size. This star's total energy output, or luminosity, is 211 times the Sun's, and it has a mass of 1.1 Solar masses.


HD 156074: +7.59

HD 156074 is a 7th magnitude Star appearing in the constellation Hercules. It is 1069 light years from our solar system. It is a orange giant of spectral type C-R2IIIa: C2 3 CH3.5. Its energy output is 84 times the Sun's luminosity.


U Lyr: +8.3 to +13

U Lyrae is a 9th magnitude Variable Double Star appearing in the constellation Lyra. It is a red star of spectral type C.

This star is part of a double or multiple star system, but its orbit is not known. Its magitude +13.0 secondary component appears 10.5 arcseconds away from the primary.

U Lyrae is a pulsating Mira-type variable star of type M. Its magnitude varies from +8.3 to +13.5, over a period of 451.7 days.


Y Cnv: +4.86 to +7.32 (Repeat from March 2021)

Y Canum Venaticorum, called "La Superba" by the 19th-century Italian astronomer Father Angelo Secchi, is one of the deeply red-toned "carbon stars." Y CVn is a semi-regular (SRb) variable star; its magnitude range is from 4.8 to 6.4, over a period that averages roughly 157 days. Other periods, including one of 2000 days, are suspected. "Y" is one of the reddest stars in the sky, and is classified variously as a C7 supergiant, or as a CN5 supergiant. Its beautiful poppy-red tone is easy to see in 50 mm binoculars.
-- Brett

Scope: Apertura AD10 with Nexus II with 8192/716000 Step Encoders
EPs: ES 82* 18mm, 11mm, 6.7mm; GSO 30mm
Celestron SkyMaster 15x70 Binoculars
List Counts: Messier: 75; Herschel 400: 30; Caldwell: 12; AL Carbon Star List: 16
Brett's Carbon Star Hunt

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helicon Online United States of America
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Re: Brett's Carbon Star Hunt - April/May 2022

#2

Post by helicon »

A member recently won the VROD by referencing their observations of La Superba, that's one I have yet to see. Hopefully we'll get some clear weather over the next few weeks. Good list of targets Brett.
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
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Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
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Re: Brett's Carbon Star Hunt - April/May 2022

#3

Post by helicon »

Now that we are hopefully back in the saddle again in terms of weather I hope to make some progress with carbon stars this spring!
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Brett's Carbon Star Hunt - April/May 2022

#4

Post by helicon »

OK, new moon tonight and it is supposed to be clear....hopefully will have a few carbon stars observed, let's keep it going...
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Brett's Carbon Star Hunt - April/May 2022

#5

Post by helicon »

Just set up the Twilight II. Should be ready to go from the second story balcony. (Bortle 5ish)
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Brett's Carbon Star Hunt - April/May 2022

#6

Post by helicon »

Brief night precluded anything last week other that Gamma Virginis, a white-white double star. With tonight's moon will (given clear skies) focus on a couple of possibilities. In particular the carbon star in Canes Venatici...
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Brett's Carbon Star Hunt - April/May 2022

#7

Post by helicon »

I haven't been able to observe in some time. Carbons are once again on my list. Hope some other folks online here go after them.....
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Brett's Carbon Star Hunt - April/May 2022

#8

Post by Graeme1858 »

That's a great idea Michael! I used to enjoy going after Brett's carbon stars with my old Canon 600D. The October Challenge has some beauties in it!

I've swapped out my 1600MM for my 224MC to have a go at Jupiter tonight. You have inspired me to go for some carbon stars too!

The October list is here: viewtopic.php?f=109&t=20889

Regards

Graeme
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Re: Brett's Carbon Star Hunt - April/May 2022

#9

Post by Bigzmey »

Carbon stars are beautiful targets. I never went after them systematically, but did observe a few.

There are also stars that are not carbon but also possess rich orange or red colors. One of the most striking examples is the Garnet Star (Mu Cephei).
Scopes: Stellarvue: SV102ED; Celestron: 14" & 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: Celestron: CGE Pro. SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Delos, Panoptic & Plossls; ES: 68; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.

Observing: DSOs: 3203 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2258, S110: 77). Doubles: 2640, Comets: 38, Asteroids: 294
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