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This is an archive of past discussions about ʻOumuamua. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page.
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Interstellar object on Earth?

NOTE: Some of the following below is also copied in "Talk:Interstellar object#Interstellar object on Earth?" - for consideration/discussion - Drbogdan (talk) 12:47, 12 April 2022 (UTC)

FWIW - seems an interstellar object may currently be on Earth - recent news may be of possible interest to some I would think - iac - Stay Safe and Healthy !! - Drbogdan (talk) 20:33, 9 April 2022 (UTC)

Given this recent news, does the first sentence of this article,

ʻOumuamua is the first known interstellar object detected passing through the Solar System.

need to be changed, since Oumuamua was detected in 2017 and the referenced meteorite struck the Earth in 2014?
Amolvaidya06 (talk) 21:19, 11 April 2022 (UTC)
I went ahead and made the edit. Amolvaidya06 (talk) 21:28, 11 April 2022 (UTC)

BRIEF Followup - Updated the lede of the 'Oumuamua article as follows => *ʻOumuamua is a known interstellar object detected passing through the Solar System.(+ref) It is possibly the second interstellar object known; the first being a purported interstellar meteor that impacted Earth in 2014.(+refs)" - seems better - comments welcome of course - in any case - Stay Safe and Healthy !! - Drbogdan (talk) 22:35, 11 April 2022 (UTC)

FURTHER Updates (also for consideration/discussion) - originally in the "Interstellar object" article as follows:

The first interstellar object which was discovered traveling through our Solar System was 1I/ʻOumuamua in 2017. The second was 2I/Borisov in 2019. They both possess significant hyperbolic excess velocity, indicating they did not originate in the Solar System. Earlier, in 2014, an interstellar object was purported to have impacted Earth, based on its estimated initial high velocity.

In 2019, a preprint was published suggesting that a 0.45 meter meteor of interstellar origin, did burn up in the Earth's atmosphere on January 8, 2014. It had a heliocentric speed of 60 km/s and an asymptotic speed of 42.1±5.5 km/s, and it exploded at 17:05:34 UTC near Papua New Guinea at an altitude of 18.7 km. After declassifying the data in April 2022, the U.S. Space Command confirmed the detection through its planetary protection sensors.

In April 2022, astronomers reported the possibility that a meteor that impacted Earth in 2014 may have been an interstellar object due to its estimated high initial velocity.

hope the above helps in some way - in any case - Stay Safe and Healthy !! - Drbogdan (talk) 12:30, 12 April 2022 (UTC)

References

  1. ^ Ferreira, Becky (7 April 2022). "Secret Government Info Confirms First Known Interstellar Object on Earth, Scientists Say - A small meteor that hit Earth in 2014 was from another star system, and may have left interstellar debris on the seafloor". Vice News. Retrieved 9 April 2022.
  2. ^ Wenz, John (11 April 2022). ""It Opens A New Frontier Where You're Using The Earth As A Fishing Net For These Objects." - Harvard Astronomer Believes An Interstellar Meteor (or Craft) Hit Earth In 2014". Inverse. Retrieved 11 April 2022.
  3. ^ Siraj, Amir; Loeb, Abraham (4 June 2019). "Discovery of a Meteor of Interstellar Origin". arXiv:1904.07224.
  4. ^ Handal, Josh; Fox, Karen; Talbert, Tricia (8 April 2022). "U.S. Space Force Releases Decades of Bolide Data to NASA for Planetary Defense Studies". NASA. Retrieved 11 April 2022.
  5. Roulette, Joey (15 April 2022). "Military Memo Deepens Possible Interstellar Meteor Mystery - The U.S. Space Command seemed to confirm a claim that a meteor from outside the solar system had entered Earth's atmosphere, but other scientists and NASA are still not convinced. (+ Comment)". The New York Times. Retrieved 15 April 2022.
  6. Billings, Lee (23 April 2019). "Did a Meteor from Another Star Strike Earth in 2014? - Questionable data cloud the potential discovery of the first known interstellar fireball". Scientific American. Retrieved 12 April 2022.
  7. Choi, Charles Q. (16 April 2019). "The First Known Interstellar Meteor May Have Hit Earth in 2014 - The 3-foot-wide rock rock visited us three years before 'Oumuamua". Space.com. Retrieved 12 April 2022.
  8. Specktor, Brandon (11 April 2022). "An interstellar object exploded over Earth in 2014, declassified government data reveal - Classified data prevented scientists from verifying their discovery for 3 years". Live Science. Retrieved 12 April 2022.
  9. United States Space Command (6 April 2022). ""I had the pleasure of signing a memo with @ussfspoc's Chief Scientist, Dr. Mozer, to confirm that a previously-detected interstellar object was indeed an interstellar object, a confirmation that assisted the broader astronomical community". Twitter. Retrieved 12 April 2022.

Science News at ‘Oumuamua gets a new origin story

Here is an article about ‘Oumuamua gets a new origin story from Science News. Rjluna2 (talk) 20:46, 25 June 2022 (UTC)

There's no such story on the site. Perhaps it was taken down - the latest post is: https://www.sciencenews.org/article/oumuamua-interstellar-object-origin-pluto-exoplanet-not-aliens — Preceding unsigned comment added by 50.111.29.1 (talk) 14:16, 31 August 2022 (UTC)

Review article

The Interstellar Interlopers a review article discussing Oumuamua and 2I/Borisov. Agmartin (talk) 16:51, 25 September 2022 (UTC)

'alien spacecraft'

While not stressed, the article still has too much emphasis on this - there are probably less than 5 astrophysicists who give even the slightest credence to this guff. I recommend reducing it to the briefest of mentions and removing it from the lede. 50.111.29.1 (talk) 14:26, 31 August 2022 (UTC) 

:I went to review it and there was a very clear, concise description that a small number of astrophysicists may think its is extra terrestrial. Which I think is fair. MaximusEditor (talk) 19:50, 19 October 2022 (UTC)

More on hydrogen gas theory

Scientists think they know why interstellar object 'Oumuamua moved so strangely -- Beland (talk) 21:27, 22 March 2023 (UTC)

Closest Approach to Earth and Golden Ratio

The closest approach distance in AU is currently listed as 0.1618 AU (24,200,000 km; 15,040,000 mi). The source of that is a web pages which list the closest approach as "24,000,000 km" or "15,000,000 mi" https://www.popularmechanics.com/space/news/a28958/first-interstellar-object-gets-a-name/ and those figures would result in 0.1604 AU or 0.1613 AU, not 0.1618 AU. The extra 200,000 km or 40,000 mi in those figures has been chosen by someone to make the closest approach match the Golden ratio to 4 significant figures. — Preceding unsigned comment added by Lamontcg (talk • contribs) 17:19, 2 September 2023 (UTC)

Ah, I see that the linked JPL database has the closest approach to Earth at the bottom listed as "0.16175 AU" which I've updated this page to have that value, since that is authoritative and the significant figures are supported by the uncertainty that the JPL data indicates. Lamontcg (talk) 17:30, 2 September 2023 (UTC)

JPL listed the closest approach as 0.16174 to 0.16177 au. -- Kheider (talk) 20:02, 2 September 2023 (UTC)

New study on why Hydrogen Iceberg doesn't work

https://avi-loeb.medium.com/oumuamua-was-not-a-hydrogen-water-iceberg-1dd2f7a6107f Looks like the hydrogen theory is bust, so to my knowledge it looks like pretty much every proposed explanation for what this thing was has been shot down. — Insertcleverphrasehere 19:39, 21 June 2023 (UTC)

Loeb has a conflict of interest because his funding for his pet project requires everything being aliens. He is becoming the Rudy Giuliani of astronomy. -- Kheider (talk) 12:58, 3 September 2023 (UTC)
That's putting it VERY politely, Kheider :) — Preceding unsigned comment added by 92.6.182.106 (talk) 14:14, 3 September 2023 (UTC)

Orthography

Elsewhere on Wiki, the initial character of the name is called an ʻokina ; it's not a diacritic, but an unicameral (no "capital" form) letter. Using the UNICODE character \x02BB (in HTML, "& #x02bb ;" without the spaces ; decimal 699) is recommended in preference to apostrophes, back-ticks or other approximations. Since Wiki can handle this, it's what should be used. Most of the rest of Hawai&#x0288ian script is Latin/ Roman characters. And yes, that is an ʻokina in both "ʻokina" and "Hawaiʻi". (I only just found this out myself.)

AKarley (talk) 22:36, 11 January 2024 (UTC)

"Part of the sky"

But as a nearby star, Vega was not in the same part of the sky at that time

Speaking as a non-astronomer: to me, "part of the sky" means the apparent constellation it's found in. But the rest of that para is about Vega's distance from the Sun at the time. Am I misunderstanding it, or is it a phrasing problem? Marnanel (talk) 14:56, 19 January 2024 (UTC)