Author Topic: NASA - Perseverance, Mars 2020 Rover : Discussion  (Read 431539 times)

Offline Blackstar

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1460 on: 02/19/2022 03:02 pm »
Something fell off the rover.

Offline redliox

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1461 on: 02/19/2022 03:14 pm »
Something fell off the rover.

Is that part of the coring/sampling equipment, or too soon to guess?
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Offline Jim

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1462 on: 02/19/2022 03:52 pm »
Something fell off the rover.

Is that part of the coring/sampling equipment, or too soon to guess?

He is being funny.  It is a sample tube.

Offline edzieba

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1463 on: 02/19/2022 06:20 pm »
New fetch rover design to include a plastic scoop and a paper bag?

Offline Blackstar

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« Last Edit: 02/19/2022 09:01 pm by Blackstar »

Offline redliox

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1465 on: 02/19/2022 09:32 pm »
Why would they leave a sample tube already?  I'm surprised this hasn't been mentioned on Space.com or elsewhere yet.
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Offline ccdengr

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1466 on: 02/19/2022 09:37 pm »
That's not a sample tube, it's the "launch bit" that sealed the system prior to operation.  It was dropped prior to the first sample and we are back to the same location.  https://trs.jpl.nasa.gov/bitstream/handle/2014/49670/CL%2318-2326.pdf slide 19.  "Corer is sealed with a launch bit, preventing particle transport into corer interior volume."
« Last Edit: 02/19/2022 09:45 pm by ccdengr »

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1467 on: 04/18/2022 04:06 pm »
Before Preseverance starts climbing into the chosen delta fork: what are the grade limits for ascent / descent slopes for the rover?

Offline Dalhousie

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1468 on: 04/24/2022 03:54 am »
Before Preseverance starts climbing into the chosen delta fork: what are the grade limits for ascent / descent slopes for the rover?

Close to 30 degrees I should think based on Curiosity.
"There is nobody who is a bigger fan of sending robots to Mars than me... But I believe firmly that the best, the most comprehensive, the most successful exploration will be done by humans" Steve Squyres

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1469 on: 04/24/2022 05:57 am »

Before Preseverance starts climbing into the chosen delta fork: what are the grade limits for ascent / descent slopes for the rover?
Close to 30 degrees I should think based on Curiosity.
Thank you! That means that in the hypothetic competition between the rover and the copter on the slope of Kodiak  Perseverance could climb higher than Ingenuity might hop up for taking the photos.
Data: Kodiak height is ~60 m; Ingenuity ceiling (promised but not reached yet) is 15 m.
Photo credits: Thomas Appere

Offline Phil Stooke

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1470 on: 04/24/2022 06:11 am »
The object on the ground (in that very old image, it's not recent) is the flight abrasion bit which was mounted in the coring/sampling system to keep it clean during flight and landing.  It stayed in place until just before the first attempted sampling when it was dropped onto the surface and replaced with the actual abrasion bit used for the first abrasion.  It is NOT a sample tube.

Offline Dalhousie

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1471 on: 04/27/2022 07:09 am »

Before Preseverance starts climbing into the chosen delta fork: what are the grade limits for ascent / descent slopes for the rover?
Close to 30 degrees I should think based on Curiosity.
Thank you! That means that in the hypothetic competition between the rover and the copter on the slope of Kodiak  Perseverance could climb higher than Ingenuity might hop up for taking the photos.
Data: Kodiak height is ~60 m; Ingenuity ceiling (promised but not reached yet) is 15 m.


What's the steepest slope Ingenuity can land on?
"There is nobody who is a bigger fan of sending robots to Mars than me... But I believe firmly that the best, the most comprehensive, the most successful exploration will be done by humans" Steve Squyres

Offline Hobbes-22

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1472 on: 04/28/2022 08:30 am »
Where can I find the Perseverance (and Ingenuity) science data?

I was somewhat surprised to find it's not in the Planetary Data System: Perseverance is not listed as a mission in the PDS Image Atlas
« Last Edit: 04/28/2022 08:31 am by Hobbes-22 »

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1473 on: 05/22/2022 10:46 am »
What's the steepest slope Ingenuity can land on?
Sorry for missing your question. Answer: 10 degrees

Balaram et al. say in their 'Mars Helicopter Technology Demonstrator' (2018), page 15:

The landing system provides for a passive drop onto the ground from a height of 0.3 m with only limited attitude
rate control active during the final contact event with the ground. This minimizes ground-control interactions that could de-stabilize the helicopter. The landing gear is designed to allow the landing on surface with slopes upto 10 deg in any direction with the vehicle at an additional roll (or pitch) angle of 30 deg. Vertical velocity at the height where the passive gravity drop is initiated can be as high as 2.5 m/s. A horizontal velocity of upto 0.5 m/s can be present due to delivery errors in the control system.

Offline ccdengr

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1474 on: 05/22/2022 08:01 pm »

Offline Star One

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1475 on: 05/26/2022 07:15 am »
How that supposed doorway on Mars is the latest example of pareidolia in spaceflight and astronomy.

https://theconversation.com/a-doorway-on-mars-how-we-see-things-in-space-that-arent-there-183562

Offline JonAl

Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1476 on: 05/28/2022 11:26 am »
Ok. According to link, It’s a naturaly random geologic formation which we associate to something artificial. But, should’nt curiosity, honoring it’s name, take a second peek and demonstrate its versatility to explore?

Offline Hobbes-22

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1477 on: 05/28/2022 12:51 pm »
Where can I find the Perseverance (and Ingenuity) science data?
https://pds-imaging.jpl.nasa.gov/volumes/mars2020.html

That's strange. I was going by the PDS image atlas, which doesn't list Perseverance or Mars 2020:

https://pds-imaging.jpl.nasa.gov/search/?fq=-ATLAS_THUMBNAIL_URL%3Abrwsnotavail.jpg&q=*%3A*
« Last Edit: 05/28/2022 02:47 pm by Hobbes-22 »

Online vjkane

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1478 on: 06/03/2022 12:59 am »
Article on Nature on Perseverance's current campaign

https://www.nature.com/articles/d41586-022-01543-z

Offline Star One

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1479 on: 06/04/2022 07:53 pm »
Perseverance and its pet wheel rock.

Quote
How do you choose a rock on Mars? Sometimes you don’t— it chooses you.
For the past 4 months, Perseverance has had an unexpected traveling companion. Back on sol 341— that’s over 100 sols ago, in early February— a rock found its way into the rover’s front left wheel, and since hitching a ride, it’s been transported more than 5.3 miles (8.5 km). This rock isn’t doing any damage to the wheel, but throughout its (no doubt bumpy!) journey, it has clung on and made periodic appearances in our left Hazcam images.

https://mars.nasa.gov/mars2020/mission/status/384/perseverance-has-a-pet-rock/

 

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