From: Milton Aupperle <milton@outcastsoft.com>

Date: January 21, 2010 2:29:25 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Mars again!


Hi Jim;


Thanks for sharing..


Maybe frost on the flanks of the volcano, which gives it a slightly higher albedo but not enough to change the color?


According to this:


http://www.lpi.usra.edu/publications/slidesets/mvolcan/slide_14.html


the slopes of it are rather steeper (10°) than the other shield volcanoes, so maybe you get a higher reflectance when the sun is lower on the horizon?


The image at that link sure looks brighter.


TTYL..


Milton Aupperle


On 21-Jan-10, at 1:58 PM, jimchung2338 wrote:

Wow, look at all the activity on this forum!


And now my turn to add to all the traffic.  Mars from Toronto this morning (Jan21) with my 12" SW dob under average seeing conditions - I takes what I gets.


What's interesting is the bright area that I can see in both images which seems to correspond to the Eysium Mons peak (14,000 m elevation).  I don't think its a cloud formation since it doesn't appear in the blue channel, only clearly in the green channel.



Ideas?



http://tech.groups.yahoo.com/group/Astro_IIDC/files/Planetary/MarsJan21b.jpg 



Jim