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Pages: 1 Special Ed Postmaster Reged: 05/18/03 Loc: Greenbrier Co., WV 38N, 80W High Altitude Cloud on Martian Limb       #5135254 - 03/22/12 10:54 AM Edit   Reply   Quote Quick Reply   Hi, A very interesting phenomenon has been imaged on Mars. Look here for details. Post Extras:       Asbytec Guy in a furry hat Reged: 08/08/07 Loc: La Union, PI Re: High Altitude Cloud on Martian Limb [Re: Special Ed]       #5135305 - 03/22/12 11:24 AM Edit   Reply   Quote Quick Reply   Yea, that's very interesting. Seeing them on a different planet is cool. I see them here, on planet earth, tonight. Post Extras:       Ed D Carpal Tunnel Reged: 04/30/10 Loc: Sunny South Florida Re: High Altitude Cloud on Martian Limb [Re: Asbytec]       #5136099 - 03/22/12 07:36 PM Edit   Reply   Quote Quick Reply   WOW, that is really interesting. Ed D Post Extras:       tigerroach Pooh-Bah Reged: 08/13/08 Loc: Houston, TX USA Re: High Altitude Cloud on Martian Limb [Re: Ed D]       #5136173 - 03/22/12 08:20 PM Edit   Reply   Quote Quick Reply   Sweet! Just waiting for the sun to go down... hopefully the high-altitude winds that destroyed the seeing from here last night will be gone. Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: High Altitude Cloud on Martian Limb [Re: Special Ed]       #5136620 - 03/23/12 03:13 AM Attachment (128 downloads) Edit   Reply   Quote Quick Reply   Here is a sketch of mars performed last night with a 203mm. A yellow cloud spreading as shown and a cloud seen at the limb (high altitude). May be some others catched the event. Stanislas-Jean Post Extras:       RLTYS Post Laureate Reged: 12/18/04 Loc: New York (Long Island) Re: High Altitude Cloud on Martian Limb [Re: Special Ed]       #5136752 - 03/23/12 08:04 AM Edit   Reply   Quote Quick Reply   That is so cool. Rich (RLTYS) Post Extras:       ggalilei professor emeritus Reged: 09/01/11 Loc: Kentucky Re: High Altitude Cloud on Martian Limb [Re: RLTYS]       #5136994 - 03/23/12 11:40 AM Edit   Reply   Quote Quick Reply   Interesting image, and great observing skills. I'm just beginning to learn, I can only see the brightening of the western limb. Are they carbon dioxide clouds? Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: High Altitude Cloud on Martian Limb [Re: ggalilei]       #5137155 - 03/23/12 01:24 PM Edit   Reply   Quote Quick Reply   They are presently white clouds on the equator area made of materials coming from the thawing of the polar cap. These brightenings in fact are a mist (dust and hazze majorily) staying for the most at the limb and terminator. They are called white clouds. Now recently was viewd a yellow cloud on noachis pandorae fretum area with an altitude cloud. This was first reported in US by MMr Parker Don and Mark Philips may be 2 days before, but not on the same area as shown on the sketch. This is a big event that may be greater in activity with time. Stanislas-Jean Post Extras:       David Knisely Postmaster Reged: 04/19/04 Loc: southeastern Nebraska Re: High Altitude Cloud on Martian Limb [Re: stanislas-jean]       #5137226 - 03/23/12 01:58 PM Edit   Reply   Quote Quick Reply   Quote: They are presently white clouds on the equator area made of materials coming from the thawing of the polar cap. These brightenings in fact are a mist (dust and hazze majorily) staying for the most at the limb and terminator. They are called white clouds. Now recently was viewd a yellow cloud on noachis pandorae fretum area with an altitude cloud. This was first reported in US by MMr Parker Don and Mark Philips may be 2 days before, but not on the same area as shown on the sketch. This is a big event that may be greater in activity with time. Stanislas-Jean No, the clouds closer to the equator are mainly either morning hazes or orographic clouds that form as the martian atmosphere is forced upwards by high topographic features such as the martian volcanoes in Tharsis. Most of the brighter white clouds are orographic in nature with the more prominent ones forming over areas like Olympus Mons or the other Tharsis shields. The southern limb clouds currently are the polar hazes, but the ones over the equator are not. Clear skies to you. Post Extras:       David Knisely Postmaster Reged: 04/19/04 Loc: southeastern Nebraska Re: High Altitude Cloud on Martian Limb [Re: ggalilei]       #5137234 - 03/23/12 02:02 PM Edit   Reply   Quote Quick Reply   Quote: Interesting image, and great observing skills. I'm just beginning to learn, I can only see the brightening of the western limb. Are they carbon dioxide clouds? Some may be, but others are high altitude water ice clouds. Clear skies to you. Post Extras:       Special Ed Postmaster Reged: 05/18/03 Loc: Greenbrier Co., WV 38N, 80W Re: High Altitude Cloud on Martian Limb [Re: stanislas-jean]       #5137350 - 03/23/12 03:18 PM Edit   Reply   Quote Quick Reply   Stanislas, A very nice set of sketches showing the Meridiani/Erythraeum/Acidalium albedo features as well as the multitude of clouds visible around the Martian disk. Quote: Now recently was viewd a yellow cloud on noachis pandorae fretum area with an altitude cloud. This was first reported in US by MMr Parker Don and Mark Philips may be 2 days before, but not on the same area as shown on the sketch. This is a big event that may be greater in activity with time. Stanislas-Jean This is the cloud that I referred to in my original post and provided the link to imagery by Wayne Jaeschke. Don Parker has an excellent image posted on the Yahoo Mars Observers website but I think you have to be a member of the group to view it (for those out there who would like to see it). Some estimates put this cloud rising to an altitude of 250 km (160 miles). Some people liken it to a plume rather than a cloud (like a volcanic plume). There is some speculation that the origin of the cloud/plume could be the impact of a large body into the Martian surface. That's not fetched that far--there have been plenty of impacts on Mars in the past. Others feel that it is an illusion of lighting and imagery artifacts on the terminator. Edited by Special Ed (03/23/12 03:23 PM) Post Extras:       WayneJ Carpal Tunnel Reged: 08/20/09 Loc: West Chester, PA Re: High Altitude Cloud on Martian Limb [Re: Special Ed]       #5137888 - 03/23/12 09:23 PM Edit   Reply   Quote Quick Reply   Hi all, Just an FYI that the phenomena on Mars was mentioned in a story on MSNBC today. Cloudy Nights was mentioned (with a link to this thread!) Mysterious cloud spotted on Mars Regards, Wayne Post Extras:       Scanning4Comets Markus Reged: 12/26/04 Loc: Hamilton, Ontario, Canada Re: High Altitude Cloud on Martian Limb [Re: WayneJ]       #5138212 - 03/24/12 01:53 AM Edit   Reply   Quote Quick Reply   Velly Intalesting ! I seen it on the 19th, but just figured it was some dark marking I didn't know about, as I am not familiar with the Martian markings and their names. Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: High Altitude Cloud on Martian Limb [Re: Special Ed]       #5138646 - 03/24/12 10:48 AM Attachment (71 downloads) Edit   Reply   Quote Quick Reply   I did a second observation of Mars yesterday night with the same scope and the 305mm to see if something change also. 1st thing, this appeared less conspiscious than the day before but what happened was this bright dot at the limb brighter than the yellow patch that was a stretched band appearnce in red color. 2nd thing, the bright dot at the limb involved me a confusion sothat some high altitude cloud was expected in the 200mm. Some glare effect due to the brightness of the dot at the limb. This was not seen at the 305mm at the same period time. Globally what was seen yesterday was less strong than the day before, the overall size of the yellow patch less contrasty in intensity and size. People at japanese CMO body said this could be more an aurorae than clouds itselves. Personnally I don't know but this is strange to see. I think globally this opposition more cloudy and hazzy with the cap thawing processus. May be something in relation. The sketches of yesterday night here. These last observations here doesnot put on question the observations above of the before yesterday night. I am BAA member Mark, and CN forum participating, interresting here for some exchanges. Stanislas-Jean Post Extras:       contrailmaker Pooh-Bah Reged: 01/02/09 Re: High Altitude Cloud on Martian Limb [Re: stanislas-jean]       #5139198 - 03/24/12 04:11 PM Edit   Reply   Quote Quick Reply   Very nice sketches Stanislas. I've had no luck seeing the projection with my 152mm refractor. Will try again tonight. cm Post Extras:       Shadowalker Apocaloptimist Reged: 11/23/04 Loc: Bay Saint Louis, Mississippi, ... Re: High Altitude Cloud on Martian Limb [Re: contrailmaker]       #5139486 - 03/24/12 07:57 PM Edit   Reply   Quote Quick Reply   Hey, You guys got a mention on MSNBC. Good work! http://cosmiclog.msnbc.msn.com/_news/2012/03/23/10831821-mysterious-cloud-spotted-on-mars Post Extras:       Glassthrower Vendor - Galactic Stone & Ironworks Reged: 04/07/05 Loc: Oort Cloud 9 Re: High Altitude Cloud on Martian Limb [Re: Shadowalker]       #5141231 - 03/25/12 09:19 PM Edit   Reply   Quote Quick Reply   I'm still following the story on this cloud formation. Have they definitively put forth an explanation yet? And did you guys see anything new since? I've had a couple clear nights lately, but can't get the time to do any quality observing. Best regards and clear skies, MikeG Post Extras:       Pages: 1

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