David's Astronomy Pages (Sky Tours)
Sep (2) - Autumn Red Stars

Image collection based on the sky 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

Back to Top


2.  V Aquilae - Carbon Star

Back to Top


3.  Alpha Vulpeculae - Star

Back to Top


4.  T Lyrae - Carbon Star

Back to Top


5.  RS Cygni  - Variable Star

Back to Top


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.

Back to Top


7.   Mu Cephei - Star

Back to Top


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

Back to Top


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

Back to Top


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

Back to Top


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)

Back to Top