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Mars Observation (January 28, 2010)

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#1 CarlosEH

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Posted 29 January 2010 - 04:03 PM

I made an observation of Mars under average seeing conditions (5/10) with brief moments of steady seeing (7/10). The amount of detail visible was impressive considering that Tharsis was visible. I made sectional sketch of the Mare Eryhtraeum/Solis Lacus regions which appeared mottled and with fine detail. I welcome any comments on my observation.

Date (U.T.) January 28, 2010
Time (U.T.): 05:00-06:00
CM (Degrees West): 128.8-143.4
Ls 043.9*, De 14.8*, Ds 16.9*, p 1.00, 14.1"
Instrument: 9-inch (23-cm) F/13.5 Maksutov-Cassegrain
Magnification: 295x and 388x
Filters (Wratten): 30 (Magenta) and 80 (Blue)
Seeing (1-10): 5 (moments of 7), Antoniadi 9I-V): III-II
Transparency (1-6): 4

Notes:
05:15 U.T. (CM 132.4*W, Wratten 30 (Magenta)): The North Polar Cap (NPC) appeared brilliant (10/10) surrounded by a dark to dusky (3-4/10) collar comprised of Lemuria. Tharsis appears dusky to shaded (4-6/10) and mottled on the central meridian (CM). Ceraunius appears as a dusky (4/10), broad streak on the CMover the northern hemisphere. Mare Acidalium appears dark to dusky (3-4/10) with bright to very bright (7-8/10) haze over it over the South-preceding (SP) limb. Nilokeras (4/10) and Lunae Lacus (4-5/10) are visible extending from the South-following border of Mare Acidalium. A very bright (8/10) cloud is visible over Tempe. Ganges appears as a broad, dusky to dull (4-5/10) band extending between Lunae Lacus and Aurorae Sinus (3-4/10). The Propontis Complex appears dark to dusky (3-4/10) over the North-following (Nf) limb. Solis Lacus appears dark to dusky (3-4/10) with Calydon (4/10) and Eosphoros (4/10) projecting from it's northern border. Agathodaemon (Coprates) is visible projecting from the following border of Aurorae Sinus. Aonius Sinus is visible as a dusky (4/10) wedge towards the southern limb. Mare Sirenum appears dark to dusky (3-4/10) with dull (5/10) projections extending over it's northern border appearing to connect to Valhalla (4-5/10). Trivium Charontis is visible over the following limb and appears dusky (4/10). Evening limb haze (ELH), morning limb haze (MLH), and the southern limb appear very bright to extremely bright (8-9/10).

A digital image produced in Pixelmator.

Carlos

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#2 CarlosEH

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Posted 29 January 2010 - 04:04 PM

05:45 U.T. (CM 139.7*W, Wratten 80 (Blue)): An very to extremely bright (8-9/10) cloud is visible over the preceding limb over Mare Acidalium. A bright to very bright (7-8/10) cloud is visible over Chryse/Xanthe and projecting into Tharsis. A bright to very bright (7-8/10) cloud is visible over Tempe. A very to extremely bright (8-9/10) cloud is visible over Elysium on the following limb. A very to extremely bright (8-9/10) cloud is visible over the Propontis complex region on the following limb. Evening limb haze (ELH), morning limb haze (MLH), and the southern limb appear very bright to extremely bright (8-9/10).

A digital image produced in Pixelmator.

Carlos

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#3 CarlosEH

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Posted 29 January 2010 - 04:06 PM

I made a sectional sketch of the South-preceding (Sp) limb which contained Mare Erythraeum and the Solis Lacus regions. Mare Erythraeum appeared dark to dull (3-5/10) and mottled. Agathodaemon (Coprates) appeared as a dark to dusky (3-4/10) projection from the following border of Aurorae Sinus (3-4/10). Tithonius Lacus appeared as a dark to dusky (3-4/10) "knob" at the following end of Agathodaemon. Baetis appeared as a dusky (4/10) projection from the following border of Aurorae Sinus. Solis Lacus appeared dark to dusky (3-4/10) with Calydon (4/10) and Eosphoros (4/10) projecting from it's northern border. Aonius Sinus appeared as a dusky (4/10) wedge towards the southern limb.

A digital image produced in Pixelmator.

Regards,
Carlos

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#4 CarlosEH

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Posted 29 January 2010 - 04:07 PM

A labeled image of my Magenta (Wratten 30) filter observation of Mars. I hope that this helps.

The best of luck in your own observations of Mars.

Carlos

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#5 Jeremy Perez

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Posted 29 January 2010 - 04:23 PM

Carlos, not only is the level of detail in this sketch incredible, it is also beautifully crafted. Thanks for the great inspiration!

#6 S1mas

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Posted 29 January 2010 - 05:27 PM

Yes! Photo cann't reach such beauty.

#7 Sol Robbins

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Posted 29 January 2010 - 05:48 PM

Excellent!

#8 JayinUT

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Posted 29 January 2010 - 06:10 PM

Carlos,

Truly a stunning sketch with incredible detail. :jump: :jump: :bow: :bow: :bow: :bow: :jump: :jump: A pleasure to view and enjoy. Thanks for sharing this.

#9 mathteacher

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Posted 29 January 2010 - 06:17 PM

Thank you. :bow:

#10 dweller25

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Posted 29 January 2010 - 06:39 PM

Wow Carlos that is really amazing.

#11 Tommy5

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Posted 29 January 2010 - 07:47 PM

Wow great detail on your sketch,Solis Lacus looks quite a bit different from the '03 opposition, i quess we are viewing it from a more northern perpective, thanks for posting, great observation.

#12 CarlosEH

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Posted 29 January 2010 - 11:37 PM

Thank you all for your kind compliments on my latest observations of Mars. When the seeing steadied for brief moments the detail over the Solis Lacus region became complex. Solis Lacus does appear foreshortened due to the northern inclination (~15 degrees North) of the planet at this time. The North Polar Cap (NPC) is shrinking (sublimation of the thin carbon dioxide layer into the Martian atmosphere to be exact) at this time. The meteorological (cloud) activity is interesting as well (especially prominent in blue light (Wratten 38, 80)).

The best of luck in your own observations of Mars.

Carlos

#13 Jef De Wit

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Posted 30 January 2010 - 07:20 AM

Carlos, that's a lot of detail that you see on the red planet!

For labeling my own observation I use your (with Daniel) marsmap from a link that you put some time ago on this forum. But the resolution of the website is not so good. Is there a way to get the map in a better resolution?

#14 Jeff Young

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Posted 30 January 2010 - 08:24 AM

Another masterpiece, Carlos!

-- Jeff.

#15 frank5817

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Posted 30 January 2010 - 11:11 AM

Carlos,

No words. breathtaking

Frank :)

#16 CarlosEH

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Posted 30 January 2010 - 08:18 PM

Frank, Jef, and Jeff

Thank you for your kind compliments on my latest Mars observations. I was fortunate to be able to see the detail noted during my observing session. The amount of detail visible at times was difficult to render.

Jef- I am not aware of a larger version of the old ALPO Mars map (Troiani/Hernandez). I will see if it can be enlarged. I have provided several links to excellent maps of Mars (albedo and topographic). I hope that they help.

Links;
http://lunar.ksc.nas...ch/marsnom.html (a possibly larger Mars map by Troiani/Hernandez)
http://alpo-j.asahik...test/map123.JPG
http://www.britastro.org/mars/maps.htm
http://mars.jpl.nasa...t/marsmap1b.jpg
http://ralphaeschliman.com/id22.htm

Carlos

#17 NUNKY

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Posted 31 January 2010 - 04:49 AM

Toujours aussi beaux tes dessins ! :bow:
Christian

#18 Jef De Wit

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Posted 31 January 2010 - 08:22 AM

Carlos, thanks a lot for the links.

#19 Kris.

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Posted 31 January 2010 - 01:51 PM

once again you raised the bar for us all Carlos :grin:

#20 CarlosEH

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Posted 01 February 2010 - 06:28 AM

Christian and Kris,

Thank you for the compliments on my latest Mars observations. I am glad that you have been able to observe Mars as well.

Jef- You are welcome and I hope that the links help you in identifying the albedo features you observe.

Carlos






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