Category:Artist's impressions of 1I/ʻOumuamua

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 Images were included here after 09:24, 29 November 2022 as the best available images for the description of the body as shown below. Artist's impression of ʻOumuamua.jpg was in a stable state 00:47, 11 December 2017 after upload 18:59, 10 December 2017, as shown at → https://commons.wikimedia.org/wiki/File:Artist%27s_impression_of_%CA%BBOumuamua.jpg → File history)

Discussion

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Color

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reddish (Richmond 2017 spiff.rit.edu using Masiero 2017) [1] "Spectroscopic measurements ... red, consistent with comets or organic-rich asteroids...within the Solar System" (Meech, K., Weryk, R., Micheli, M. et al Nature 552, 378–381 (2017) [2] the colour is similar to less-red Trojans orbiting with Jupiter (Michele T. Bannister et al 2017 ApJL 851 L38) [3]

Ratio

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ratio = length : width (1)

ESO/K. Meech et al.


Jewitt, Luu, Rajagopal, Kotulla, Ridgway, Liu, Augusteijn 2017: "...lightcurve range ... ∼2.0±0.2 magnitudes. Interpreted as a rotational lightcurve ... body ... semi-axes ∼230 m × 35 m. A ∼6:1 axis ratio" [4] (230 / 35 = 6.57 (rounded down)

ESO found that the ESO/Meech et al. lightcurve of the object represented a non-planar rotation of a 10:1 body [5][6] a mean radius of 102±4 m; with the assumption: ...the ...lightcurve is dominated by the shape of the object [7]

Bannister et al. December 2017: "axial ratio of at least 5.3:1" [3][8]

Ćuk @ Seti Institute states a range of 5-10:1, with a shape that is not supported by the findings of Mashenko. The statement doesn't show support from scientific evidence of how this ratio was determined [9]

Mashchenko found by modelling the lightcurve a 91% probability the object was thin disk - slab shaped having a 6:1 [10]

References

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  1. ↑ Michael Richmond (October 2017) http://spiff.rit.edu/richmond/asras/oumuamua/oumuamua.html (Jan 28, 2018), http://spiff.rit.edu/ (Rochester Institute of Technology) citing Joseph Masiero (version 1: 27 Oct 2017; Nov 2017 (v.2) Palomar Optical Spectrum of Hyperbolic Near-Earth Object A/2017 U1 https://arxiv.org/abs/1710.09977: https://arxiv.org/ (Cornell University)
  2. ↑ Karen J. Meech (Institute for Astronomy, Honolulu, Hawaii, USA), Robert Weryk, Marco Micheli, Jan T. Kleyna, Olivier R. Hainaut, Robert Jedicke, Richard J. Wainscoat, Kenneth C. Chambers, Jacqueline V. Keane, Andreea Petric, Larry Denneau, Eugene Magnier, Travis Berger, Mark E. Huber, Heather Flewelling, Chris Waters, Eva Schunova-Lilly & Serge Chastel (2017-11-20) A brief visit from a red and extremely elongated interstellar asteroid Nature 552 7685 378–381 10.1038/nature25020 pmid 29160305 bibcode=2017Natur.552..378M: https://www.nature.com/
  3. ↑ a b Michele T. Bannister, Megan E. Schwamb, Wesley C. Fraser, Michael Marsset, Alan Fitzsimmons, Susan D. Benecchi, Pedro Lacerda, Rosemary E. Pike, J. J. Kavelaars, Adam B. Smith, Sunny O. Stewart, Shiang-Yu Wang (王祥宇), Matthew J. Lehner https://iopscience.iop.org/article/10.3847/2041-8213/aaa07c/meta The American Astronomical Society The Astrophysical Journal Letters, https://iopscience.iop.org/ (Institute of Physics) observations made "2017 October 29" using Frederick C. Gillett Gemini-North Telescope → (NASA) https://www.nasa.gov/, https://www.nasa.gov/mission_pages/WISE/multimedia/pia16211.html → https://www.nasa.gov/mission_pages/WISE/news/wise20121015.html
  4. ↑ Michael Richmond (October 2017) http://spiff.rit.edu/richmond/asras/oumuamua/oumuamua.html (Jan 28, 2018), http://spiff.rit.edu/ (Rochester Institute of Technology) citing David Jewitt (← ht here via www2.ess.ucla.edu), Jane Luu (← ht via wikipedia), Jayadev Rajagopal, Ralf Kotulla, Susan Ridgway, Wilson Liu, Thomas Augusteijn (5 Nov 2017) https://arxiv.org/abs/1711.05687 https://arxiv.org/ (Cornell University) (http://www.not.iac.es/ → http://www.not.iac.es/general/newnot/ : 2.56 m La Palma) (made 25 & 26th of October ← http://www.minorplanetcenter.net/db_search/show_object?object_id=1I, http://www.minorplanetcenter.net/ using en:wikipedia id=198953341) & WIYN (Ralf Kotulla): (27th October ← Hanneke Weitering space.com)
  5. ↑ European Southern Observatory https://www.eso.org/public/images/eso1737f/ (20 November 2017) → https://www.eso.org/public/images/eso1737f/zoomable/, https://www.eso.org/
  6. ↑ https://dictionary.cambridge.org/dictionary/english/planar, https://dictionary.cambridge.org/ Cambridge University Press
  7. ↑ Karen J. Meech, Robert Weryk, Marco Micheli (← ht here via wikipedia), Jan T. Kleyna, Olivier Hainaut, Robert Jedicke, Richard J. Wainscoat, Kenneth C. Chambers, Jacqueline V. Keane, Andreea Petric, Larry Denneau, Eugene Magnier, Mark E. Huber, Heather Flewelling, Chris Waters, Eva Schunova-Lilly, Serge Chastel https://www.eso.org/public/archives/releases/sciencepapers/eso1737/eso1737a.pdf (November 1, 2017), p.2 (right column 3rd paragraph), https://www.eso.org/ (ORCID i.d.s attached are presumed securely true without corroboration)
  8. ↑ https://orcid.org/0000-0003-3257-4490: Michele T. Bannister was employed at Astrophysics Research Centre Queen's University Belfast during 2017 c.f. https://commons.wikimedia.org/wiki/File:A2017U1_5gsmoothWHT_enhanced.jpg : Alan Fitzsimmons, indicated: 4.2 m William Herschel Telescope
  9. ↑ Matija Ćuk (January 30, 2018) https://www.seti.org/three-surprises-oumuamua, https://www.seti.org/ (Seti Institute)
  10. ↑ Sergey Mashchenko (11 Sep 2019 (v3) https://arxiv.org/abs/1906.03696 Monthly Notices of the Royal Astronomical Society, Volume 489, Issue 3; https://arxiv.org/ (Cornell University)

Subcategories

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