天王星 月惑星研究会 関西支部

Uranus Image 2006/09/08(UT)

Ralf Vandebergh,Richard Bosman,Robert Heffner,Donald C Parker
R.Vandebergh,R.Bosman,R.Heffner,Don

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Additional set from the Sept 8 observations of the Uranus SPR.
Sent: Friday,September 08,2006 5:29 PM
Subject: 2006/09/08 Uranus observations
The moon very close to Uranus in the sky,also the reason that I could not
take an image of the Uranus-moons  this time,due to the strong light,and
the required longer exposure.But no problem for the HR-images.

This set of observations confirms again what was found in the previous sessions:
At the same level of processsing,some variations of albedo in the red filter images,and
a homogeneous disk in the blue light images.This finding can easily be explained; the red filter
absorps the methane-bands in the Uranus atmosphere,and the disk becomes darker,so brigther
albedo features can be seen.

In the color RB images,is show how the South Polar Region becomes visible  when the
image is darker printed.Seeing in this session was from fair-good in the begin to
exellent during culmin.


The moon very close to Uranus in the sky,also the reason that I could not
take an image of the Uranus-moons  this time,due to the strong light,and
the required longer exposure.But no problem for the HR-images.

This set of observations confirms again what was found in the previous sessions:
At the same level of processsing,some variations of albedo in the red filter images,and
a homogeneous disk in the blue light images.This finding can easily be explained; the red filter
absorps the methane-bands in the Uranus atmosphere,and the disk becomes darker,so brigther
albedo features can be seen.

In the color RB images,is show how the South Polar Region becomes visible  when the
image is darker printed.Seeing in this session was from fair-good in the begin to
exellent during culmin.


A little animation made of red light R610 filter images from my Sept 8 session.


This is interesting
Attached is an animation made of R(G)B images from both my Sept 8 and 9 sessions.
Exact time-difference between the 2 images is 24 hours  4min.We see the steady position of the SPRegion.

[バンディバ:オランダ]
[Ralf Vandebergh:Neighbourhood of Maastricht Netherlands]

MessageHi all,yesterday,with a good tranparantie and nice seeing,I capture Uranus.
I capture for 16 minutes,that's about 1900 frames only in R (astronomik) by  2 fr. ps and 900 frames where used.
This time I have not used  wavelet in Registax,but little unsharp-mask and levels/ contrast.
The attachment shows,from the raw stack to the end result.

Unauthorized use prohibited
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[ボスマン:オランダ]
[copyright(c)2006 Richard Bosman: Netherlands]

Here is a Uranus observation in what I would describe as very good seeing.
I wanted to try various filters / image scale but the clouds only
allowed for these two captures.
Perhaps some limb brightening and or shading is visible. The first image
has 2,000 frames,second image is around 1,000 frames.

[Robert Heffner:Aichi,Japan]

I have attached an image of Uranus taken on 8 September. SPR is bright.

[ Donald C Parker Coral Gables,Florida U.S.A]

ALPO-Japan Latest Uranus Section	2006/09/09
	2006/09/06