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Sky Tour : Autumn Red Stars - September

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Sky Tour based on tour "Red Stars at night, stellar delight" featured in the Sep 2012  edition of Astronomy Now. 

As of the present date (Oct 2012), I have only imaged 2 out of the original 8 star objects listed in the Astronomy Now tour and I have therefore added in a few other red stars that I have imaged.

Bullet  1. Alpha Herculis - Star (not yet imaged)
Bullet  2. V Aquilae - Star (not yet imaged)
Bullet  3. Alpha Vulpeculae - Star (not yet imaged)
Bullet  4. T Lyrae - Carbon Star (not yet imaged)
Bullet  5. RS Cygni - Variable Star (not yet imaged)
Bullet  6. EV Lacertae - UV Type Variable Star
Bullet  7. Mu Cephei - Star (not yet imaged)
Bullet  8. S Cephei - Carbon Star (Mira type variable)
 
Bullet  9. U Her - Mira type variable
Bullet  10. Red Star Spectra
Bullet  11. Y CVn - Variable Star - Carbon Star

1.  Alpha Herculis - Star

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2.  V Aquilae - Carbon Star

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3.  Alpha Vulpeculae - Star

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4.  T Lyrae - Carbon Star

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5.  RS Cygni  - Variable Star

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6.  EV Lacertae - UV Type Variable Star

EV Lac (Lacerta)
UV + BY
Image
Annotated CCD Image 
3 x 30 sec exposure (average combine), 2x2 binning, C Filter
2008-06-09 00:22 UT (#290078-82)
 
EV Lac - Reference Stars 
Image
Annotated CCD Image 
60 sec exposure, 2x2 binning, R Filter
2008-06-09 00:20 UT (#290079)
 
EV Lac (Lacerta)
A 90min time series run was conducted using a V Filter
The run successfully caught the rise and decay of a flare (0.1 mag)
Image
100 x 45s frames, 2x2 binning, V Filter
2008-10-05 01:33 to 03:08 hUT (#310395-494)
Image
EV Lac flare  - detail
Flare detected at 01:37hUT (2008-10-05), 
It took 4 minutes to rise to peak (01:40h) and  then took a further 70 minutes to decay away.
0.1 mag brightening at peak.

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7.   Mu Cephei - Star

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8.   S Cephei - Carbon Star (Mira type variable) 

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9.    U Her -  Mira type variable

U Her (Hercules)
mage showing U Her with comparison and check stars

Image  

Annotated CCD Image
3 x 20s exposure, 2x2 binning, C Filter 
2006-07-23 22:36 hUT (#131027-29)
 

U Her is a mira variable with catalog period of 406.1 days and magnitude range of +6.4 to +13.4.

 Image

 

 The comparative brightness of U Her in Infrared band is 
shown in the following series of images (2006-07-23)

Image 

CCD Images (cropped) , 5s sec exp, 2x2 binning, 2006-07-23
B: #131030, V: #131045, R: #131039, I: # 13143

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10.  Red Star Spectra  

    A catalogue of star spectra taken using LX200, Star Analyser 100 and SBIG ST-7e :

Star Name
(designation)
Spectra Type
(catalog)

Spectra Lines  ( Star Analyser 100)
 

Image Date/No. & Notes
 
Visible Light
Range
Image infrared to right 
(not coloured)
RR CrB M5  Image 2008-04-24 (#284052-56)
 R Lyr   M5 Image  2008-05-08  (#286189-91)
R Aur M6-M9 Image 2008-04-24 (#284033-35)
R Leo  M6-M9 Image 2008-04-24 (#284043-45)
U Her M6-M9 Image 2008-04-17 (#283143-45)
     
Star Name
(designation)
Spectra Type
(catalog)

Spectra Lines  ( Star Analyser 100)
Monochromatic &  Approx Colour
 

Image Date/No. & Notes
 
R Aur M6-M9 Image 2008-04-24 (#284033-35)
 R Aur   Image significant infrared 
component

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11.  Y CVn  - Variable Star (Carbon Star)

CVn Y (Canes Venatici) - Red variable star
Large Carbon Star

Image
CCD Image
3 x 20s (Median Combine, 2x2 binning, C Filter
2006-05-08 23:54 hUT (#123156-58)
[ Insert at 200% size ]

 

Colour Images showing CVn Y's red colouration

Image
Approximate Colour CCD Image
Red : 1s exp (R Filter), Green : 1s exp (V Filter), Blue : 2s exp (B Filter)
2x2 binning, 2006-05-08 23:55 hUT (#123159-67)
[ Insert at 300% size ]

  

R Filter
Image
 
B Filter
Image
CCD Images 
Top  :::::  20s, 2x2 binning, R Filter, 2006-05-24  23:41h UT (#127052)
Bottom : 30s, 2x2 binning, B Filter, 2006-05-24  23:38h UT (#127046)

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This Web Page: Sky Tours - Autumn Red Stars 
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site