Lost landers from HiRISE, The next step |
Lost landers from HiRISE, The next step |
Feb 21 2012, 06:09 PM
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#46
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Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
Although this looks like an interesting candidate, it is worth pointing out that there is also some fairly bright soil near that large gathering of rocks. What is the possibility of ice or frost in the Mars 3 landing zone?
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Feb 21 2012, 06:34 PM
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#47
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
It's only 45deg South, and HiRISE images mid-afternoon. I'd consider frost to be very very unlikely.
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Feb 21 2012, 06:41 PM
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#48
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Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
That Soviet movie was very cool. Here are some of the essentials I have gleaned over the years...
MARS 3 Main parts * Lander = 1.2 meter spherical, with 4 petals to right itself * Aero/Heat shield = 2.9 meter, (more conical, than rounded- there is no back shell) * Braking parachute * Main parachute * Retro rockets MARS 3 EDL Sequence 09:14 UT (2/DEC/71) Mars 3 separated from the orbiter 09:30 UT - Engines were fire to re-orient the spacecraft (aeroshield forward) 13:47 UT - Entry into the Martian atmosphere at 5.7 km/sec; at an angle less than 10 degrees. (unknown time) - The braking parachute was deployed (unk time) – Main chute was deployed which was ‘reefed’ until the craft dropped below supersonic velocity, at which time it was fully deployed. (unk time) – The aero/heat shield was ejected, and the radar altimeter was turned on. Mars 3 is going in head first (altimeter is on the top of the craft) (unk time) - At an altitude of 20 to 30 meters at a velocity of 60 - 110 m/s the parachute is released with retrorockets, bring it off to the side, the main retrorockets continue to fire. The lander is released to drop to the surface. The retros carry the remainder of the EDL framework away (remind anyone of MSL?) 13:50:35 UT - Mars 3 ‘landed’ at the surface at a reported 20.7 m/s (ouch!); approx 45S, 158W . (unk time) - The four petal-shaped covers open to right the lander 13:52:05 UT –The lander starts transmitting to the Mars 3 orbiter. 13:52:25 UT - The surface transmissions stop. What should be left: Aeroshield/Heatshield (size: 2.9 meters, within 500 meters of lander?) Main parachute with spent retrorocket (unknown size; within 150 meters of the lander?) EDL framework with spent retrorockets (size: <2 meters, within 100 meters of the lander) Lander (1.2 meter sphere, white, 4 petals protruding) (...or some jumbled up mess of lander and chutes....) -------------------- CLA CLL
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Feb 21 2012, 07:29 PM
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#49
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Junior Member Group: Members Posts: 60 Joined: 1-August 06 From: Vienna, Austria Member No.: 1002 |
In 'The Difficult Road to Mars' by VG Perminov, Nasa Monograph, NP-1999-06-251-HQ
The heatshield is given as 3.2m (limited by the Proton shroud) and with a vertex angle of 120 The braking parachute area 13m2 Main parachute area 140m2 with the heat shield being jettisoned after main shute deployment 16-30m above the surface the solid fuelled braking engines fire to slow down the descent down to 6.5m/s at which point the lander is released into freefall. The braking engines released from their burden are then intended to 'flyaway' the main parachute as shown very graphically in Figure 12, bullet 13. The aeroshell is 'pushed' away 17s after impact In this source the text and the diagram indicate that the main shute and the braking engines remain attached right up to lander release. Could that be a 140m2 parachute wrapped round the braking engines or even the lander?? |
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Feb 21 2012, 08:07 PM
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#50
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Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
If it is on top of the lander, the chute could stay cleaner because the dust would slide off the fabric. It's an interesting find either way, maybe it's a large outcropping of gypsum?
-------------------- Space Enthusiast Richard Hendricks
-- "The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke Mother Nature is the final inspector of all quality. |
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Feb 21 2012, 08:09 PM
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#51
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
The movie is really amazing, IM4... at the last minute, you can see even dustdevils!
-------------------- I always think before posting! - Marco -
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Feb 22 2012, 02:37 PM
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#52
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Solar System Cartographer Group: Members Posts: 10146 Joined: 5-April 05 From: Canada Member No.: 227 |
My concern about this is that I would not expect the parachute to be white after all this time. The Viking parachutes are almost invisible. On the other hand it is very solitary... no other similar features around it. However, the chance of determining which nearby lumps would be any other bit of mission hardware seems very unlikely.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jan 24 2013, 12:48 AM
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#53
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Member Group: Members Posts: 215 Joined: 23-October 12 From: Russia Member No.: 6725 |
Difference in parachutes of Vikings and the Soviet devices, apparently because of a material. The parachute of Mars-6 is visible very well.
-------------------- My blog on Patreon
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Jan 24 2013, 01:13 AM
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#54
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
That's not a parachute - it's exposed bedrock.
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Apr 11 2013, 06:55 PM
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#55
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Junior Member Group: Members Posts: 64 Joined: 15-June 12 From: Hong Kong Member No.: 6419 |
-------------------- UMSF - the place of Opportunity to satisfy your Spirit of Curiosity via Perseverance
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Apr 11 2013, 07:12 PM
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#56
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
I would call this intriguing, but far from definitive. The 'parachute' to me looks particularly suspect; not only does it look again like an exposed bedrock outcrop but it's suspiciously white after more than 40 years of airborne dust deposition.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Apr 11 2013, 08:36 PM
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#57
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
^ Contrast-stretched image?
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Apr 11 2013, 09:43 PM
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#58
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Junior Member Group: Members Posts: 45 Joined: 18-July 05 Member No.: 439 |
Copying from another thread: plausible Mars 3 candidate found! [really big image removed - not necessary to repeat this in a quote - MOD] I'd like to say that the image at reply #46 ( http://www.unmannedspaceflight.com/index.p...st&p=183049 ) and the upper row of inserts in the PIA16920 image show exactly the same detail. So the text of the announcement lacks the first known discovery of Mars 3 chute; as Cosmic Penguin has said it was initially published with correct identification at the Novosti Kosmonavtiki forum and you may see the message and the image here: http://novosti-kosmonavtiki.ru/forum/forum11/topic13212/ . The date of the posting is 20 Nov 2011 but the author claims he had found the suspected chute some time -- probably weeks or even months -- earlier. |
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May 2 2013, 01:02 AM
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#59
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Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
Just got an email from the HiRise team for (one) of my HiWish sites. Yay!
Soviet Mars 3 Parachute Search: http://www.uahirise.org/ESP_031247_1345 this is west of the images above. -------------------- CLA CLL
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May 29 2013, 03:14 PM
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#60
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Senior Member Group: Members Posts: 1083 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
Soviet Mars 6 parachute ?
Well.. Unfortunately not ! An image just taken after a Soyuz landing in Kazakhstan (resampled HiRISE-style) ! When I "landed" on the real image, I could not resist showing it to you : look how striking are the similarities of the Kazakhstani desert features with the Martian surface ! Enjoy |
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