From Christophe PELLIER
® . . . . . . .Date: Mon, 13 Oct 2003 21:35:40
+0200
Subject: Re: RE:CMO news ?
Dear Masatsugu,
first congratulations for your 840+ drawings. I hope that you will exceed the thousand ! On my side I don't really hope to reach one
hundred of images sets (that would mean 100 nights of observations, and the
weather still has a bad look). Thanks very much for sending me some of your drawings, they depict very well how the dust was going on in
early july. I'm quite desperate not to have witnessed
any dust so far, except just a little bit in the first july
observations !
Thank you for
allowing me to use your sentences. Many thanks also for your article about the
blue layer, it really teaches me many things. I feel
quite uneasy with the idea of blue clearing and I never make such comments on
my images. As you points out there are many factors that can explain that we
see the dark markings in blue. On my side the question I would have is, where
is the pertinent wavelength point where we should say that the atmosphere in
blue is more clear than the day or the month before !
Now about the spots :
1) The dark spot
near
2) The white spot on
the september 16th images.
This spot is real: I have seen an image taken by another french
observer on same night where it is also visible. My logical reasonment
was that a white spot in a color image visible in every color, especially in
red, should be a frost deposit. It is situated near 100°W, 46°N, very close to
Alba Patera, but I see no crater that could for
example explain it.
It sounds
extraordinary to me to detect such a thing but there have been many unexpecting details detected this year it seems. I think
that there is also "something" on my september 15th images near the same place.
I'm happy to know
that the few images made with the W47 has been appreciated a little because
it's rather ungrateful to use such an absorbing filter !
Would you be kind
enough to explain me what were Okano's comments about SP-4, SP-6 and W47 ? I would be very, very interesting to know his analysis. I did not received the SP-4, which seem to be
unknown at the Fuji French homepage, but however I can use the W47 or another
deep blue filter bought from Schuler. It's sad that the CCDs
are so insensitive to short wavelengths.
About the dust veil:
I strongly hope that my images will show the obscured evening limb, if the sky
ever clear on the following weeks. I have been, however, recently wondering
about this veil, if it was still there or not. Of all the color images I have
made, it seems that only two show it with certainty (23 july and the second RGB of august 11th). It's one of
the most difficult detail to reproduce. My
interrogation came because if I'm not mistaken, there are more white clouds now
on the planet than in july-august. If true, can't
this be a proof of a dust settling ? Without any dust
cloud to stir it again since the end of july,
it can't stay in the atmosphere for ever... The blue images of november-december 2001 seemed to show also an increase in
white clouds while the obscuration was ending.
Best wishes
PS About the enfant
terrible, your french culture looks
very wide... Did you mean something particular !!
® . . . . . . .Date: Mon, 13 Oct 2003 21:41:39
+0200
Subject: Mars
October 11 2003
Hi all, for the last
clear night the seeing was again very poor.
The morning
http://astrosurf.com/pellier/2003-10-11-CPI
Regards
® . . . . . . .Date: Sun, 19 Oct 2003 14:29:52
+0200
Subject: Mars, october 17 2003
Hi all, some images
taken under correct conditions, better than my previous two sets of this month
but still not satisfying ! The IR images have been realized by stacking the W47
with the RG610. It sounds unusual but actually it works... Also
an attempt of making a true LRGB image.
http://astrosurf.com/pellier/2003-10-17-CPI
Regards
Christophe PELLIER (Bruz,
