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This is an old revision of this page, as edited by 146.255.180.184 (talk) at 07:29, 25 September 2023 (→Capsule return: Reply). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

First US craft, or first craft?

The article states that "If successful, OSIRIS-REx will be the first US spacecraft to return samples from an asteroid." Have there been any successful non-US asteroid sample return missions? If so, what were they? -- 80.168.238.56 (talk) 10:42, 4 September 2016 (UTC)[reply]

Ah -- I've just found the sample return mission article, which explains all. -- 80.168.238.56 (talk) 10:44, 4 September 2016 (UTC)[reply]
To me it reads a bit like a PR statement - it should really read something like "It would be the second spacecraft to return samples from an asteroid but the first from the U.S." (or something more readable). Loweredtone (talk) 13:55, 11 September 2018 (UTC)[reply]

Misleading wording "threatening asteroid"

From the article: "His name was chosen for this mission as asteroid Bennu is a threatening Earth impactor capable of causing vast destruction and death."

This is needlessly alarming to the lay reader. There is no serious threat from Bennu. The two references cited are fringe media. — Preceding unsigned comment added by 68.190.240.94 (talk) 00:31, 1 October 2016 (UTC)[reply]

Gravity slingshot due 22 Sept 2017

Details (eg map with altitudes ) here [1] - Rod57 (talk) 14:22, 13 September 2017 (UTC)[reply]

Did NASA consider leaving radar reflectors on the asteroid

It would be nice to know why they decided against leaving passive radar reflectors on the surface (for future tracking) - Rod57 (talk) 14:25, 13 September 2017 (UTC)[reply]

Capsule return

It would be useful to include the manner in which the sample return capsule (SRC) will be returned to Earth. I assume they will fly the spacecraft to flyby Earth and release it as it goes by, but could not find info on that. Cheers, Rowan Forest (talk) 22:45, 10 December 2018 (UTC)[reply]

Possible touchdown location based on visual examination
https://goo.gl/maps/EzfgFopt2J9AcaYz7 2001:1530:1017:B419:B991:9A98:19AB:8BCE (talk) 16:24, 24 September 2023 (UTC)[reply]
I believe the touchdown location to be here:
https://www.google.com/maps/place/40%C2%B022'20.2%22N+113%C2%B014'24.1%22W/@40.3722766,-113.240464,140m/data=!3m1!1e3!4m4!3m3!8m2!3d40.372272!4d-113.240037?entry=ttu
using aircraft flight tracking information and the visual from the live video feed from NASA. (I used the 2021 images available on google earth rather than the 2013 images from google maps) TDaveM (talk) 18:38, 24 September 2023 (UTC)[reply]
you are right 146.255.180.184 (talk) 07:29, 25 September 2023 (UTC)[reply]

"presence of hydroxyl (oxygen-hydrogen) bonds, likely part of hydrates in the clay material"

"By 10 December 2018, spectroscopic surveys of the asteroid's surface detected the presence of hydroxyl (oxygen-hydrogen) bonds, likely part of hydrates in the clay material of the asteroid. While researchers suspect that Bennu was too small to host water, these hydroxyl groups and hydrates may have come from water present in Bennu's parent body."

NASA home page: "detected water" {{www.nasa.gov/news/press-release/nasa-s-new-...}} Mission page {{asteroidmission.org}} (objectives): "water" Mission page (latest news): "water locked inside the clays" Official announcement at Fall 2018 AGU: "water-bearing", "water-rich" Principal investigator Dante Lauretta: "water found" {{twitter.com/dslauretta/status/10139082993664}}

So what's this hydroxyl redirect? A redirect. Water and hydroxyl are geologically, thermodynamically, and meteoritically equivalent.

OH- (hydroxyl) exists there bound, and is not water (H2O). The same conversation took place at Talk:101955 Bennu#"The presence of hydroxyl..." and it settled for "hydrated minerals". Be mindful it does not mean wet minerals, but they have a hydroxyl group bonded. The observed clay was formed in the presence of water, but once dry, it has no water, only traces of the reactions caused by water. Cheers, Rowan Forest (talk) 22:02, 13 January 2019 (UTC)[reply]
Re. thermodynamic equivalency: it applies to liquid water at 24°C under one atmosphere of pressure. Hardly the physical parameters in the deep freeze and vacuum of outer space. As NASA summarized their own technical lingo: "[…] meaning that at some point, Bennu’s rocky material interacted with water." [2] Right, no longer interacting with water. Bound OH- is not water. Although this is a preliminary observation, water is ubiquitous, so there may be water ice below the subsurface, I just don't think its spectrometers can penetrate as a radar would, and it does not have a neutron detector. Lets remember this is a NASA preliminary report and it may change when data is cross-referenced. Cheers, Rowan Forest (talk) 14:44, 14 January 2019 (UTC)[reply]

OSIRIS-APEX

Apparently OSIRIS-REx is being renamed OSIRIS-APEX due to it's extension mission to Apophis in 2029, do we update now or wait? Goose (talk) 00:23, 26 April 2022 (UTC)[reply]

@GeesenGoosen @Mfb and @Ergzay should we rename the page to a common name "OSIRIS (spacecraft)"?? Chinakpradhan (talk) 03:45, 26 April 2022 (UTC)[reply]
When its heritage concept was proposed in the Discovery Program in 2004, it was called only OSIRIS, with REx for "Regolith Explorer" used descriptively rather than as part of the name.[1] This mission is also sometimes called New Frontiers 3, for it being the third of the New Frontiers program missions.[1][2] Chinakpradhan (talk) 04:29, 26 April 2022 (UTC)[reply]
this is what the page only says Chinakpradhan (talk) 04:30, 26 April 2022 (UTC)[reply]

nevermind just notice it got edited already, y'all are fast

References

  1. ^ a b Lauretta, Dante. "Asteroid sample-return mission OSIRIS – OSIRIS regolith explorer (REx)" (PDF). European Space Agency. Archived from the original (PDF) on 2018-11-23. Retrieved 2020-07-24.
  2. ^ Perison, R.; Dworkin, J. (2016). Supply Chain (PDF) (Report). Public Domain This article incorporates text from this source, which is in the public domain.

new discussion about renaming page to osiris apex

now that osiris rex's return capsule has returned to earth (!!!!), there is now no spacecraft called osiris rex in space, as the existing spacecraft is now designated osiris apex

should this page be renamed to OSIRIS-APex, or perhaps as a previous topic suggested, ORISIS (spacecraft)? Clayel (talk) 15:04, 24 September 2023 (UTC)[reply]

OSIRIS (spacecraft) seems appropriate as encompassing the now multiple-target mission. Randy Kryn (talk) 15:17, 24 September 2023 (UTC)[reply]
The definition of the REx part of the name has been lost in this renaming... Waveny42 (talk) 15:46, 24 September 2023 (UTC)[reply]
Then we can say "formerly known as OSIRIS-REx" and define the REx in the lead. I support renaming to OSIRIS (spacecraft). Rainclaw7 (talk) 15:58, 24 September 2023 (UTC)[reply]

Requested move 24 September 2023

OSIRIS-REx → OSIRIS (spacecraft) – As shown by the article's current sources, the Sample Return Capsule has returned to Earth, ending the OSIRIS-REx mission. The main spacecraft is continuing to asteroid Apophis on its extended mission, referred to as OSIRIS-APEX. As a result, this article should be renamed to OSIRIS (spacecraft) to allow it to cover both missions without confusing the reader. The lead has already been updated to refer to APEX, which is confusing due to the rest of the page focusing on REx. Rainclaw7 (talk) 16:07, 24 September 2023 (UTC)[reply]

Alternatively, the article can be renamed to OSIRIS-APEX due to NASA and the media using that name. Rainclaw7 (talk) 16:45, 24 September 2023 (UTC)[reply]

Early touch down of sample capsule

I've seen several news and some more technical articles that say that the reason for the sample capsule touching down 3 minutes earlier than expected was because the main parachute opened at 6 km / 20,000 ft above the earth instead of 1.6 km / 5,000 ft as intended.

I wanted to add this to the article (with WP:RS) - and may still do so - but I also wanted to include a brief explanation as to why this would cause the capsule to touch down earlier rather than later. This seems counter-intuitive to me since the purpose of the parachute is to slow its descent, therefore deploying it earlier should mean that it takes even longer to reach the ground.

Anyone know of a source that explains this? Thanks. 220.235.82.123 (talk) 04:05, 25 September 2023 (UTC)[reply]

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