Phobos |
Phobos |
Jul 1 2011, 10:18 AM
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#226
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Member Group: Members Posts: 247 Joined: 17-February 07 From: ESAC, cerca Madrid, Spain. Member No.: 1743 |
Phobos & Jupiter in Conjunction
Sorry if this was covered somewhere else, but I didn't see it mentioned here. A couple weeks ago, ESA published a new Phobos fly-by video. You can see it at: http://www.esa.int/esaSC/SEMHGWD1XOG_index_0.html It shows Phobos in conjunction with Jupiter. Includes a Phobos image in 3D. -------------------- --
cndwrld@yahoo.com |
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Sep 28 2012, 05:05 PM
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#227
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
there isn't a thread for Deimos, so I will post here this interesting paper just published (free of charge if registered):
New astrometric observations of Deimos with the SRC on Mars Express |
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Oct 1 2012, 09:36 AM
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#228
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Member Group: Members Posts: 247 Joined: 17-February 07 From: ESAC, cerca Madrid, Spain. Member No.: 1743 |
The official ESA web release about the improved Deimos orbit determination done by MEX is here.
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cndwrld@yahoo.com |
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Oct 1 2012, 07:43 PM
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#229
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Member Group: Members Posts: 267 Joined: 5-February 06 Member No.: 675 |
The Astronomy and Astrophysics paper on the Deimos measurements is here.
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Oct 1 2012, 09:11 PM
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#230
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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Dec 24 2013, 04:24 PM
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#231
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
first image from the 22 December flyby
http://blogs.esa.int/mex/2013/12/24/merry-...m-mars-express/ |
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Dec 25 2013, 06:28 AM
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#232
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
Worth noting that that entry on the ESA Mars Express blog actually refers back to UMSF.
From Daniel Scuka's blog entry: "Looking for a challenge? Let us know where on Phobos you think this image is located (there's a cool 'map' of Phobos over at UnmannedSpaceflight.com)." Daniel Scuka is Senior Editor for Spacecraft Operations at ESOC, ESA's European Space Operations Centre, Darmstadt, Germany. |
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Dec 28 2013, 07:49 PM
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#233
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Senior Member Group: Members Posts: 1648 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
-------------------- Steve [ my home page and planetary maps page ]
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Dec 29 2013, 01:41 AM
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#234
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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Nov 2 2022, 12:18 PM
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#235
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Member Group: Members Posts: 242 Joined: 28-October 12 Member No.: 6732 |
As is mentioned in an ESA web release about the recent close flyby of Phobos by Mars Express, "[t]he orbit of Mars Express has been fine-tuned to get us as close to Phobos as possible during a handful of flybys between 2023 and 2025". A quick WebGeocalc search gives five flyby opportunities with a distance to the surface of less than 100 km during this period:
Date ............ Distance to surface [km] 2023-07-21 ... 52 2024-01-09 ... 55 2024-05-30 ... 62 2024-11-15 ... 45 2025-09-16 ... 40 So mark your calendar and let's hope Mars Express isn't switched off by then. |
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Nov 2 2022, 05:52 PM
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#236
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
Looking forward to those close flybys. I'm especially wanting images from close flybys of the blue-white toned and the ochre toned areas on Phobos. As well as another, closer pass with the MARSIS instrument.
https://www.esa.int/ESA_Multimedia/Images/2...rface_of_Phobos -------------------- |
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Nov 2 2022, 07:22 PM
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#237
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Senior Member Group: Members Posts: 2091 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Mars Express certainly needs to continue. MMX's planners would certainly be grateful for more data.
Since Exomars is being delayed for so long, there's surely a small amount of money in the ESA budget, right? Extended missions are generally much cheaper to run than a primary mission, with the smaller teams and efficiency/experience of those still working on it. |
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Nov 2 2022, 08:23 PM
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#238
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Since Exomars is being delayed for so long, there's surely a small amount of money in the ESA budget, right? Extended missions are generally much cheaper to run than a primary mission, with the smaller teams and efficiency/experience of those still working on it. Having a mission be delayed usually means it's going to cost MORE money. https://www.bbc.com/news/science-environment-63336201 In this case "up to €360m" That said - I would be very surprised if ESA couldn't find the relatively modest budget to keep MEX going until the spacecraft is no longer functional. |
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Nov 3 2022, 03:00 AM
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#239
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Senior Member Group: Members Posts: 2091 Joined: 13-February 10 From: Ontario Member No.: 5221 |
In the long term yes, but that would all be spread out over the next 8-10 years. Since these Phobos flybys are in the next 2 years, the costs of the primary Exomars mission would be being spent right now if not for the delay.
The peak cost is the period before and during a primary mission, from what I read in NASA budgets (like the charts and tables here which show a sort of bell curve and a long 'tail' of minimal expenses for extended missions). I'm assuming the logic works the same with ESA missions. Sorry to get a bit into the weeds on this, but there should be no excused to cancel scientifically significant flybys of a very interesting object! |
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Nov 3 2022, 03:23 PM
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#240
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
The peak cost is the period before and during a primary mission Spacecraft get cheaper once you launch them. Look at New Horizons, MSL, OSIRIS REX, Juno etc in the amazing TPS Google Doc. The moment you launch them - the cost plummets by a factor of about 4+ The two years of prime mission for MSL averaged ~$80M The six years before that averaged >$300M. Put another way - the ExoMars rover is going to be more expensive now than when it's actually operating. It's going to be more expensive over the next 5 years than had it launched on time and was operating in the same time frame. But again - I agree - the cost of operating MEX is in the weeds compared to the new costs for ExoMars. I fully expect MEX to keep going. Remember - we've had the same "The budget goes to zero in a year" for many other Mars missions that have carried on for year and years thereafter as the budget was found. MSL, Odyssey, MER...all saw similar fiscal outlooks at certain points. |
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