Observatoire de l'Institut d'Optique Graduate School
Antenne de Saint Etienne

Saturn

 

The standard :
from Hubble Space Telescope (HST)
Diameter : 2.4 m
Location : space (outside the turbulent atmosphere...)

Some difficult details can be seen
in our feb 25 2005 image, see below !!!

 

Saturn, mars 15, 2007, at 21h38 UT
Good
seeing (fog)
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro
II webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain ~ 95 %
Stack of
1000 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

The Encke and Maxwell divisions are visible.

 

Saturn, mars 15, 2007, at 22h21 UT
Good
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Sony camera xcd-sx 910 (BW)
3.5 i/s, gain and shutter adjusted manually
Stack of
600 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

 

 

Saturn, february 19, 2007, at 22h01 UT
Poor
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro
II webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain = 80 %
Stack of
1000 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

 

 

Saturn, march 15, 2006, at 21h10 UT
VERY POOR
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro
II webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain = 80 %
Stack of
500 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

The Encke and Maxwell divisions are barely visible.
The blue colour in the northern hemisphere (top) could be sunlight passing through the Saturn's rings and being scattered by the cloud-free upper atmosphere.

 

 

Saturn, january 31, 2006, at 21h57 UT
VERY POOR
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro
II webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain = 80 %
Stack of
500 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

 

 

Saturn, february 25, 2005, at 22h23 UT
Good
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain = 80 %
Stack of
1000 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

Same as above, with a different processing.

 

Saturn, february 9, 2005, at 21h45 UT
Good
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain = 80 %
Stack of
1100 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

The Encke division is clearly visible, in the outer edge of the A ring !

The dark spot at the south pole is also visible (OK, difficult).

Same image as above, but with a strong luminosity enhancement.


The Maxwell division is clearly visible, in the outer edge of the C ring !

 

Saturn, february 4, 2005, at 22h06 UT
Poor-Fair
seeing
C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro webcam
10 i/s, 1/25-second exposures
all at 50 %, except gamma = 10 % and gain = 80 %
Stack of
700 frames processed with Registax
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

 

Saturn, february 24, 2004, at 20h53 UT
Fair seeing

C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro webcam
(BW)
10 i/s, 1/25-second exposures, all at 50 %, except gain = 80 %
Stack of 800 frames processed with IRIS
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

The Encke division is clearly visible, in the outer edge of the A ring !

 

 

Saturn, february 10, 2004
Good seeing

C14 + AP 1200 GTO
IR block Baader
Powermate Televue 2.5 x
Philips ToUcam Pro webcam
(BW)
(upper)
22h05 UT, 10 i/s, 1/33-second exposures,
all at 50 %, except gain = 85 %, stack of 800 frames
(lower)
20h55 UT, Raw mode, 5 i/s, 1/25-second exposures,
all at 50 %, except gain = 85 %, stack of 580 frames
Processed with IRIS
Thierry Lépine – Ecole Supérieure d’Optique – Saint Etienne – France

The Encke division is clearly visible, in the outer edge of the A ring !