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Mars Observation (June 10, 2010)

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#1 CarlosEH

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Posted 10 June 2010 - 03:51 PM

I made an observation of Mars on June 10, 2010. Although the angular diameter was less than six arc-seconds (5.7” to be exact) I was able to detect albedo features when the seeing steadied for moments at a time.

Date (U.T.): June 10, 2010
Time (U.T.): 01:00-01:15
CM: 276.2*W-279.9*W
Ls 102.4*, De 23.1*, Ds 24.2*
p 90%, 5.7” (Diameter)
Instrument: 9-inch (23-cm) F/13.5 Maksutov-Cassegrain
Magnification: 295x and 388x
Filters (Wratten): 30 (Magenta) and 38A (Blue)
Seeing (1-10): 5-6, Antoniadi (I-V): III
Transparency (1-6): 4

Notes:
01:00 U.T. (CM 276.2*W, Wratten 30 (Magenta): The North Polar Cap (NPC) appears small and brilliant (10/10) with a dark (3/10) collar surrounding it. Lemuria and Cecropia appeared dark to dusky (3-4/10) and mottled. Utopia and Casius appeared dark to dusky (3-4/10; Casius appearing as a dark (3/10) “spike-like” albedo feature). Elyisum appeared bright to very bright (7-8/10) with a very bright (8/10) cloud over it. The Hyblaeus Extension appeared dark to dusky (3-4/10) following Elysium. Mare Cimmerium appeared dusky to dull (4-5/10) over the south-preceding limb. Electris and Eridania appeared shaded (6/10). Mare Tyrrhenum and Syrtis Minor appeared dark to dusky (3-4/10) on the central meridian (CM). Syrtis Major appeared as dark to dusky (3-4/10), mottled, wedge-shaped albedo feature following the CM. Hellas appeared very bright (8/10) with a cloud over it. Zephyria, Aeolis, Aethiopis, Aetheria, Isidis Regio, Neith Regio, Meroe Insula, and Aeria appeared bright (7/10). Extremely bright (9/10) evening limb haze (ELH), south polar limb haze (SPLH), and morning limb haze (MLH) were noted as well.

A digital image produced in Pixelmator.

Carlos

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#2 CarlosEH

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Posted 10 June 2010 - 03:52 PM

01:15 U.T (CM 279.9*W, Wratten 38A (Blue): The North Polar Cap (NPC) appears brilliant (10/10) and small. A very bright (8/10) cloud was noted over Elysium and Hellas. Extremely bright (9/10) evening limb haze (ELH), south polar limb haze (SPLH), and morning limb haze (MLH) was noted.

A digital image produced in Pixelmator.

Carlos

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#3 Tommy5

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Posted 10 June 2010 - 10:06 PM

Amazing sketch ,lots of detail for such a tiny orb.Thanks for posting my Mars views are just of a tiny reddish/orange disk.

#4 Sol Robbins

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Posted 10 June 2010 - 10:52 PM

Excellent as usual.

#5 Uwe Pilz

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Posted 11 June 2010 - 12:35 AM

Interesting what amount of detail is possible at a disc of less than 6". I am waiting for a clear and steady air for a next (last?) observation.

#6 frank5817

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Posted 11 June 2010 - 12:37 AM

Carlos,

Beautiful sketching. :bow: :rainbow: I was observing at about the time you were and was treated to the same view for very brief intervals. I could not see the view long enough to sketch and at times I was seeing 3 overlapping Mars images as the mirror was cooling down.
Both of your drawings are amazing and thank you so much for sharing them.

Frank :)

#7 CarlosEH

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Posted 11 June 2010 - 03:39 AM

Frank, Sol, Tommy, and Uwe

Thank you all for the very kind compliments on my latest obervations of Mars. I did not expect to see much detail over the small disk of Mars but patience at the eyepiece allowed me to obtain glimpses of the features drawn. I was fortunate to have expeienced brief moments of steady seeing to have been able to observe the detail rendered. I hope that you all are able to get at least one good view of Mars before too long.

Carlos

#8 Special Ed

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Posted 11 June 2010 - 06:55 AM

Superlative observation and drawings, Carlos. The NPC appears to be hanging in there. It's funny that with all the scrutiny that Mars has received this apparition from imagers and us sketchers, there have been lots of clouds but very few reports of dust.

#9 Jef De Wit

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Posted 11 June 2010 - 10:55 AM

What can I say about this sketches? Impressive as always!

#10 Paul G. Abel

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Posted 11 June 2010 - 10:57 AM

Two wonderful drawings, Carlos and no doubt extremley accurate!

#11 dweller25

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Posted 11 June 2010 - 12:14 PM

Very impressive Carlos.

I enjoyed your drawing, for me Mars is now lost in the trees.

The change to the NPC over the last few months has been amazing.

#12 Kris.

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Posted 11 June 2010 - 03:52 PM

wow i missed this one, excellent sketch Carlos. i think the Elysium and Hyblaeus extension area is a great catch with mars so small now! i lost that some time ago.

#13 CarlosEH

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Posted 12 June 2010 - 12:14 AM

Dweller, Jef, Kris, Michael, and Paul

Thank you all for your very kind compliments on my latest observation of Mars. I too was impressed by the amount of detail visible at such a small apparent diameter. Syrtis Major and Utopia/Casius were noted consistently in the eyepiece whereas the other albedo features became visible as the seeing steadied, including Elysium and the Hyblaeus Extension. It has been interesting to watch the North Polar Cap (NPC) shrink in size over the current apparition. I am very proud of all the members who have posted observations of Mars this apparition. They have all done an outstanding job.

Carlos

#14 mike bacanin

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Posted 12 June 2010 - 06:36 AM

Carlos,

An outstanding observation considering the planet's very small angular diameter. It shows what a combination of a very fine planetary instrument, and years of experience reveals.Thank you for sharing it.

Mike

#15 CarlosEH

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Posted 13 June 2010 - 04:36 AM

Mike,

Thank you for the compliment on my latest observation of Mars. I was fortunate to experience a good night for observing Mars. The best of luck to you and your family and in your own observations.

Carlos

#16 Rick Woods

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Posted 15 June 2010 - 04:23 PM

Carlos,
I had an exceptional night of seeing on 6/10 too. Mars was very low, almost below the observatory wall; but I think I actually made out a little of the detail you showed (I had already seen your sketch at the time).

Mars: Good to the last drop!

#17 CarlosEH

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Posted 18 June 2010 - 06:39 PM

Rick,

It has been a fun Mars apparition. To be able to see detail at such a small apparent diameter is not easy. The best of luck in your future observations.

Carlos

#18 Jef De Wit

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Posted 22 June 2010 - 02:42 PM

Carlos, congratulations with your ASOD!






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