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Mars observations 26/01/'10

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#1 Kris.

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Posted 26 January 2010 - 06:26 PM

Hi everyone,it's been a while since i've visited the forums, so many good sketches added meanwhile i can't even begin commenting on then!

we've had our first, and probably last, break in the clouds in 3 weeks time, so i'm just in time to make some near opposition sketches. luckily seeing was pretty good tonight. i'll post them now and add some information tommorow! standard info can be found on the sketches themselves.

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#2 cildarith

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Posted 26 January 2010 - 07:30 PM

Nicely done, Kris! Congrats on getting a break in the clouds.

#3 mathteacher

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Posted 26 January 2010 - 09:05 PM

Kris, I enjoy your work. Thanks for the post.

#4 Jef De Wit

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Posted 27 January 2010 - 03:57 AM

Hi Kris

We live in the wrong country this month! This january is going to be one of the most cloudy januaries ever in Belgium! After the clear night yesterdag it is again grey for the moment and it will not change for the nights to come :bawling:

I also put my telescopes out last night for the Moon and Mars. It is impressive what you saw on Mars compared to what I figured out :bow:! I will post my sketches soon (I'm now working....).

#5 Uwe Pilz

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Posted 27 January 2010 - 08:21 AM

Quite a lot of detail! I enjoyed your sketches.

#6 CarlosEH

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Posted 27 January 2010 - 02:25 PM

Kris,

Excellent observations of Mars. You have recorded a good amount of detail over the Martian disk. I have labeled the major albedo features visible. Thank you for sharing them with us all.

Carlos

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#7 frank5817

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Posted 27 January 2010 - 02:31 PM

Kris,

Very exciting and impressive work. Keep at it as long as the sky holds out. :bow: :cool:

Frank :)

#8 Kris.

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Posted 27 January 2010 - 02:34 PM

Thanks Eric, Ging-Li, Jef & Uwe!

it was good to be observing mars again after some weeks, as Jef says we've got to seize the moments here in Belgium as it is snowing again :grin:

i actually planned to pull an all-nighter of observing mars, but i was too tired!

i think i've finally had a good chance to judge on the quality between my two scopes (8" & 12" f/5 dobs) because seeing was very decent and both were cooled down and collimated well. this being one of the first times seeing was pretty good AND mars showing an interesting side, i can say i *did* see more detail thru the 12" BUT i've got to 'work' harder for it. the view thru the 12" is much brighter and actually softer, which makes the 8" more pleasing to observe with, the 8" is also surely more contrasty, limb brightening and clouds are almost unvariably first spotted with the 8" and then confirmed using the 12". the thing is, on brief moments of very good seeing the 12" shows more, that's it. but mostly the image is fuzzier and harder to look at than thru the 8". perhaps the difference would be bigger as the size of mars would be 20" or bigger, then the 12" would probably almost always win out... :question:
if i had to own only one scope, it would be the 8".

about the sketches:

the first one showed a lot of limb brightening, Chryse was very bright as was the area over Tempe. the dessert plains of the northern hemisphere had a lighter yellowish hue than the the southern half.

the second sketch had almost no limb brightening :question: only a small but bright isolated cloud (?) over Tempe. some detail in Niliacus lacus and Mare acidalicum was visible, but it's not quite what current pictures show it to be... i guess i saw a hint of solis lacus just rotating into view as well. Argyre was very bright, the second brightest feature after the NPC. the darkest feature was a wedge shaped Mare Acidalicum, followed by Sinus Meridiani and the area left of solis lacus which could be aurorae sinus? Perhaps Carlos can help me out here?

best of luck with your observations!

#9 Kris.

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Posted 27 January 2010 - 02:41 PM

Ah i'm already too late for asking Carlos to help me with the labeling :) Thanks Carlos! so it would be Bosporus Gemmatus which was second darkest, together with Sinus Meridiani.

Frank: i'm collecting all the sketches to make a collage again, already up to 17 :jump:

#10 frank5817

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Posted 27 January 2010 - 02:49 PM

Kris,

Good for you, I really enjoyed the sketching collage you did two years ago when Mars was in close.

Frank :)

#11 Sol Robbins

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Posted 27 January 2010 - 02:49 PM

Very nice!

#12 markseibold

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Posted 27 January 2010 - 03:53 PM

Kris

Very impressive details you have rendered :bow: :bow: :bow: Your sketching style is precise and quite artful. Welcome back and please post more soon if possible.

I hope to get to a long focal ratio medium size telescope and see more before Mars begins to move away on January 29th.

I look forward to seeing your future observations and sketches.

Mark
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#13 NUNKY

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Posted 30 January 2010 - 10:22 AM

Tés beau dessin, j'aime beaucoup !






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