From Christophe PELLIER
® . . . . . . . .Date: Thu,
Subject: Mars july 10 2003 : poor image with the C14
Hi all, this morning I made another
attempt to image Mars with a C14 but it seems that the planet is really too low
in my sky for that big diameter. I will keep imaging with the small newtonian !
http://astrosurf.com/pellier/2003-07-10-CPI
Best regards,
® . . . . . . . .Date:
Subject: Mars 11 july 2003
Hi everyone :
I have observed this morning 30 mn before the arrival
of clouds. The transparency was quite low however and the images have suffered
a bit from this.
http://astrosurf.com/pellier/2003-07-11-CPI
Regards,
® . . . . . . . .Date: Sat,
Subject: Re: RE:Mars
Dear Masatsugu,
thank you for your e-mail : I hope that you will go on telling me what are
your wishes concerning the Mars images and on expressing special requests such
these, if needed. Your message reached me half an hour before I started my
observations from this morning so I have been able to pay a closer attention to
the G and B images. You will tell me if the images look satisfactory to you or
not. I don't know if the images show the evening mist, and I see no really
morning mist. This morning the seeing was only poor to fair, but I must be able
to observe again at least on the two following days. I have rarely seen such a
long period of clear nights with generally good seeing, and I did my best to
make the most of that - but I will always be curious of remarks, critics or
advices from you or anyone.
Yes, maybe the St Christophe
will be a kind of help - as this saint is supposed to protect the traveler
maybe it will protect my optical trips to the red planet!
There is a question that I would like to
ask about the green images, I hope that you will find time to answer on the
days to come - there is no hurry.
Are there some kind
of informations that are best seen in a G image on
Mars? For example if one wants to shoot white clouds in the atmosphere, what
can be the utility of the G image in comparison of the B? I have this in mind since a few days.
I will describe more my observations
form this morning when I send the images, later.
My best regards,
® . . . . . . . .Date: Sat,
Subject: Mars july 12 2003
Hi all : this morning the seeing went
from poor to fair but the webcam finally handled this
correctly when the planet was high enough.
Masatsugu : I have followed your advices and tried to get better G and B images.
Apart from the two RVB series I made three minutes avi
files (instead of 1-2 generally) for the 03 H 27 green image and the 03 H 35
blue image, in order to seriously increase the s/n ratio. The blue filter for
the last one was tilted following Okano's idea, it seems that the dark markings
are erased a bit more but this is not evident. I don't really know if these two
last shots show the evening mist, maybe over Argyre, but I don't really see the
presence of the morning mist.
http://astrosurf.com/pellier/2003-07-12-CPI
Best wishes
® . . . . . . . .Date:
Subject: Re: RE:Mars
Dear Masatsugu, you can postpone a future
message the way you need to do, no problem. I will observe again in a few
hours, and I hope that the seeing will be better. Maybe I'll give a try with
the W47 with IR-blocking, to see if the white clouds are better seen?
Best wishes,
® . . . . . . . .Date:
Subject: Mars july 13 2003
Hello observers:
this morning the sky was very turbulent, and it worsened again as the planet
was getting higher ! So here is only one RVB series; no other data could be
obtained.
http://astrosurf.com/pellier/2003-07-13-CPI
Regards
® . . . . . . . .Date:
Subject: Mars July 14
2003
Hi all, last night the poor seeing
suddenly became fair or fairly good. However due to some focusing mistakes the final
RGB composite couldn't be obtained! The color image is from the color Toucam. Note that it looks less detailed than the red
images with the B&W webcam.
This is certainly the last time some of
the Tharsis volcanoes show on my images... until next month ;
http://astrosurf.com/pellier/2003-07-14-CPI
Regards,
® . . . . . . . .Date: Sat,
Subject: Mars July 18
2003 - Best Mars so far
Hi everyone: last night the excellent
observing conditions and the nearly 20" apparent diameter allowed me to
take my best images of the planet so far.
No dust is seen, but the SPC is showing
much interesting phenomena. The images show a kind of almost separated segment
of the cap, duller, to the left of the image. And, the very bright pointed part
of the cap at CM ~ 10° is still there since the previous
images taken from
http://astrosurf.com/pellier/2003-07-18-CPI
Best wishes
® . . . . . . . .Date:
Subject: Mars july 19 2003
Hi all : the
conditions were again good to very good on the morning of july
19. Here are the images. The darkened Mare Serpentis looks impressive!
I'm currently observing - images will
follow, much later. It tooks much time to process all
the movies...
http://astrosurf.com/pellier/2003-07-19-CPI
Regards
® . . . . . . . .Date:
Subject: About the tilted blue filter
Dear Masatsugu - just a short message
about this idea of tilting the blue filter. I have made some tests in visual
with a good image displayed on the computer screen, and it appears that the
more I tilt my blue filter and the more it lets pass the red wavelengths.
Tilted to the maximum, it acts exactly as a magenta filter, transmitting blue
and red ! So, I'm afraid that if I tilt it, it might
kill the green ghost, but also give birth to a kind of red ghost...
Okano's idea should be tested further I
think ; maybe with the blue filter he has this method works well, but it might
depend on what blue filter is used...
Best wishes.
® . . . . . . . .Date:
Subject: Re: RE:About
the tilted blue filter
Dear Masatsugu,
Thank you for your comments on my
images. Indeed, the luck have been with me about the
observing conditions since mid-june, I hope it will
stay with me a bit longer! You didn't send me these HST images before. They
really make clear the problem. On the past few days, I've been thinking a bit
about the use of the blue filter. Precisely, as I think that to tilt my B
filter isn't maybe a perfect idea (at least with mine), I have been looking for
another blue filter, deeper, that could achieve a
better separation of B and G. And now you tell me that you're thinking about
the B390 filter, so maybe this could be an even better idea? If you have any advice of what filter
would be the best please let me know.
Thank you for giving me Okano's e-mail,
indeed I would be very interested in hearing comments from him on this topic. I
will write to him. I know most people want to have images of Mars that show the
surface details first, of course I'm also willing to make images like that, but
I'm getting more and more aware of the interest of the G and B images of Mars,
and this is thanks to the quality of the CMO work and your own remarks and
advices. I'm really caring about my G and B filters now... For the reasons why
I didn't join you sooner, the point is that back in 2001,
my equipment was as modest as my enthusiasm for planets was deep. I still
observe with the same small instrument, but in 2001 I was "only"
making drawings, and with a moderate aperture they didn't show much details. And I didn't even have a scanner to upload my
drawings... Of course you could well download my drawings of the past
apparitions of Mars from my homepage if you were interested, but the analysis
of the 2001 Mars is now over. Most observers in
I wish you good observations, and to
find the time to do all you are wanting to do about
Mars...
Best wishes,
® . . . . . . . .Date:
Subject: Mars july 20 2003
Hi all : some images of Mars
taken under very fair seeing...
http://astrosurf.com/pellier/2003-07-20-CPI
Best wishes,
® . . . . . . . .Date:
Subject: Re: FW:Mars
20th July UT
Dear Masatsugu, thanks for forwarding
me M. Valimberti's image. On my images of this
morning that show the following areas, it seems that there is no dust at all.
Maybe the yellowish haze is a few dust in the atmosphere, or just an incorrect
color by the ToUcam ?
Best regards,
® . . . . . . . .Date:
Subject: Mars july 22 2003
Hi all, this morning the seeing was
very good (at the end) and the transparency excellent. The planet looks much
quiet now. Images at
http://astrosurf.com/pellier/2003-07-22-CPI
I will be away for a few days, but
please continue to send images and messages.
Best wishes,
Christophe PELLIER (Bruz,
