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ʻOumuamua

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ʻOumuamua

ʻOumuamua tī 2017 10-gue̍h 28[lower-alpha 1]
Hoat-kiàn [2][3]
Hoat-kiàn-chiá Robert Weryk sú-iōng Pan-STARRS 1
Hoat-kiàn tē-tiám Haleakalā Obs., Hawaii
Hoat-kiàn ji̍t-chí 19 October 2017
Miâ-hō
MPC miâ-hō 1I/2017 U1[4]
Ho͘-im /ˌməˈmə/, Hawaii-gí: [ʔowˈmuwəˈmuwə] (thiaⁿ )
Hō-miâ iû-lâi
Hawaiian term for scout[4]
  • 1I
  • 1I/ʻOumuamua
  • 1I/2017 U1 (ʻOumuamua)
  • A/2017 U1[5]
  • C/2017 U1[3]
  • P10Ee5V[6]
Interstellar object[4]
Hyperbolic asteroid[7][8][9]
Kúi-tō sèng-chit[7]
Goân-kî 2017 11-gue̍h 23 (JD 2458080.5)
Observation arc 80 kang
Kīn-ji̍t-tiám 0.255916±0.000007 AU
−1.2723±0.0001 AU[lower-alpha 2]
Lî-sim-lu̍t 1.20113±0.00002
26.33±0.01 km/s (interstellar)[10]
5.55 AU/year
51.158°
0° 41m 12.12s / day
Khi-pêng 122.74°
24.597°
241.811°
Earth MOID 0.0958 AU ·37.3 LD
Jupiter MOID 1.454 AU
Physical characteristics
Dimensions 100–1000 m long[11][12][13]
230 m × 35 m × 35 m[14][15]
(est. at albedo 0.10)[14][15]
Tumbling (non-principal axis rotation)[16]
Reported values include:
  • 8.10±0.02 h[17]
  • 8.10±0.42 h[18]
  • 6.96+1.45
    −0.39
    h[19]
  • 0.1 (spectral est.)[14]
  • 0.06–0.08 (spectral est.)[18]
19.7 to >27.5[10][20][lower-alpha 3]
22.08±0.45[7]

ʻOumuamua (Hawaii-gí: ʻOumuamua) sī tē-it ê thong-kuè thài-iông-hē thàm-tshik kàu ê sing-tsè bu̍t-thé.[21] ʻOumuamua tsìng-sik bīng-miâ tsò 1I/2017 U1, iû Robert Weryk [en] tī 2017-nî 10-gue̍h 19-ji̍t teh Hawaii Haleakalā Thian-bûn-tâi [en] sú-iōng Pan-STARRS tiàu-kiànn sóo huat-hiān, tāi-iok tī 9-gue̍h 9-ji̍t ʻOumuamua king-kuè kū-lî thài-iông tsuè-kīn ê tiám 40-kang liáu-āu. Thâu-tsi̍t-pái kuan-tshik kàu ʻOumuamua ê sî-tsūn, ʻOumuamua kū-lî tē-kiû tāi-iok 3300-bān [en] km (2100-bān ing-lí; 0.22 thian-bûn tan-uī; tāi-iok sī tē-kiû kàu gua̍t-kiû kū-lî ê 85-puē), lî-tshiánn í-king uán-lî thài-iông.

Tsù-sik[siu-kái | kái goân-sí-bé]

  1. 5-minute exposure taken by the William Herschel Telescope on 28 October; ʻOumuamua appears as a light source in the center of the image, while background stars appear streaked due to the speed of ʻOumuamua as the telescope tracked it. (Eng-gí)[1]
  2. Objects on hyperbolic trajectories have negative semimajor axis, giving them a positive orbital energy. (Eng-gí)
  3. Range at which the object was expected to be observable. Brightness peaked at 19.7 mag on 18 October 2017, and faded below 27.5 mag (the limit of Hubble Space Telescope for fast-moving objects) around 1 January 2018. By late 2019, it should have dimmed to 34 mag. (Eng-gí)

Tsù-kái[siu-kái | kái goân-sí-bé]

  1. Bonnell, Jerry; Nemiroff, Robert (3 November 2017). "A/2017 U1: An Interstellar Visitor". Astronomy Picture of the Day. goân-loē-iông tī 13 March 2019 hőng khó͘-pih. 13 March 2019 khòaⁿ--ê. A point of light centered in this 5 minute exposure recorded with the William Herschel Telescope in the Canary Islands on October 28 [...] Faint background stars appear streaked because the massive 4.2 meter diameter telescope is tracking the rapidly moving A/2017 U1 in the field of view.  (Eng-gí)
  2. "Small Asteroid or Comet 'Visits' from Beyond the Solar System". NASA. 26 October 2017. goân-loē-iông tī 2 December 2017 hőng khó͘-pih. 29 October 2017 khòaⁿ--ê.  (Eng-gí)
  3. 3.0 3.1 "MPEC 2017-U181: COMET C/2017 U1 (PANSTARRS)". Minor Planet Center. International Astronomical Union. 25 October 2017. goân-loē-iông tī 25 October 2017 hőng khó͘-pih. 25 October 2017 khòaⁿ--ê.  (CK17U010) (Eng-gí)
  4. 4.0 4.1 4.2 "MPEC 2017-V17 : New Designation Scheme for Interstellar Objects". Minor Planet Center. International Astronomical Union. 6 November 2017. goân-loē-iông tī 8 January 2020 hőng khó͘-pih. 6 November 2017 khòaⁿ--ê.  (Eng-gí)
  5. "MPEC 2017-U183: A/2017 U1". Minor Planet Center. International Astronomical Union. 25 October 2017. goân-loē-iông tī 26 October 2017 hőng khó͘-pih. 25 October 2017 khòaⁿ--ê.  (AK17U010) (Eng-gí)
  6. Antier, K. "A/2017 U1, first interstellar asteroid ever detected!". International Meteor Organization. goân-loē-iông tī 7 November 2017 hőng khó͘-pih. 7 November 2017 khòaⁿ--ê.  (Eng-gí)
  7. 7.0 7.1 7.2 "JPL Small-Body Database Browser: ʻOumuamua (A/2017 U1)". JPL Small-Body Database. Jet Propulsion Laboratory. goân-loē-iông tī 19 March 2021 hőng khó͘-pih. 19 March 2021 khòaⁿ--ê. 
    JPL 1 (Solution date: 2017-Oct-24)
    JPL 10 (Solution date: 2017-Nov-03)
    JPL 14 (Solution date: 2017-Nov-21)
    JPL 16 (Solution date: 2018-Jun-26 (Eng-gí)
  8. Rafikov, Roman R. (20 September 2018). "Spin Evolution and Cometary Interpretation of the Interstellar Minor Object 1I/2017 ʻOumuamua". arXiv:1809.06389v2
  9. Skibba, Ramin (10 October 2018). "Interstellar Visitor Found to Be Unlike a Comet or an Asteroid". Quanta Magazine. goân-loē-iông tī 27 April 2020 hőng khó͘-pih. 10 October 2018 khòaⁿ--ê.  (Eng-gí)
  10. 10.0 10.1 "Pseudo-MPEC for A/2017 U1 (FAQ File)". Bill Gray of Project Pluto. 26 October 2017. goân-loē-iông tī 26 October 2017 hőng khó͘-pih. 26 October 2017 khòaⁿ--ê.  (Orbital elements) Archived 30 September 2018 at the Wayback Machine. (Eng-gí)
  11. Cofield, Calia (14 November 2018). "NASA Learns More About Interstellar Visitor 'Oumuamua". NASA. goân-loē-iông tī 15 April 2020 hőng khó͘-pih. 14 November 2018 khòaⁿ--ê.  (Eng-gí)
  12. Watzke, Megan (20 October 2018). "Spitzer Observations of Interstellar Object ʻOumuamua". SciTechDaily.com. goân-loē-iông tī 16 October 2019 hőng khó͘-pih. 20 October 2018 khòaⁿ--ê. 
  13. "ʻOumuamua". Smithsonian Astrophysical Observatory. 19 October 2018. goân-loē-iông tī 1 February 2021 hőng khó͘-pih. 24 October 2019 khòaⁿ--ê.  (Eng-gí)
  14. 14.0 14.1 14.2 14.3 Jewitt, D.; Luu, J.; Rajagopal, J.; Kotulla, R.; Ridgway, S.; Liu, W.; Augusteijn, T. (30 November 2017). "Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes". The Astrophysical Journal Letters. 850 (2): L36. arXiv:1711.05687Freely accessible. Bibcode:2017ApJ...850L..36J. doi:10.3847/2041-8213/aa9b2f.  (Eng-gí)
  15. 15.0 15.1 "A Familiar-Looking Messenger from Another Solar System" (Press release). National Optical Astronomy Observatory. 15 November 2017. NOAO 17-06. goân-loē-iông tī 16 November 2017 hőng khó͘-pih. 15 November 2017 khòaⁿ--ê.  (Eng-gí)
  16. Fraser, W. C.; Pravec, P.; Fitzsimmons, A.; Lacerda, P.; Bannister, M. T.; Snodgrass, C.; Smolić, I. (9 February 2018). "The tumbling rotational state of 1I/ʻOumuamua". Nature Astronomy. 2 (5): 383–386. arXiv:1711.11530Freely accessible. Bibcode:2018NatAs...2..383F. doi:10.1038/s41550-018-0398-z. goân-loē-iông tī 3 September 2018 hőng khó͘-pih. 3 September 2018 khòaⁿ--ê.  (Eng-gí)
  17. Bolin, B.T.; et al. (2017). "APO Time Resolved Color Photometry of Highly-Elongated Interstellar Object 1I/ʻOumuamua". The Astrophysical Journal. 852 (1): L2. arXiv:1711.04927Freely accessible. Bibcode:2018ApJ...852L...2B. doi:10.3847/2041-8213/aaa0c9.  (Eng-gí)
  18. 18.0 18.1 Bannister, M.T.; Schwamb, M.E. (2017). "Col-OSSOS: Colors of the Interstellar Planetesimal 1I/2017 U1 in Context with the Solar System". The Astrophysical Journal. 851 (2): L38. arXiv:1711.06214Freely accessible. Bibcode:2017ApJ...851L..38B. doi:10.3847/2041-8213/aaa07c. As its albedo is unknown, we do not describe 1I/ʻOumuamua as consistent with Tholen (1984) P type.  (Eng-gí)
  19. Feng, F.; Jones, H. R. A. (23 November 2017). "ʻOumuamua as a messenger from the Local Association". The Astrophysical Journal. 852 (2): L27. arXiv:1711.08800Freely accessible. Bibcode:2018ApJ...852L..27F. doi:10.3847/2041-8213/aaa404.  (Eng-gí)
  20. Meech, Karen; et al. (8 November 2017). "Proposal 15405 – Which way home? Finding the origin of our Solar System's first interstellar visitor" (PDF). STScI – Space Telescope Science Institute. 15 November 2017 khòaⁿ--ê.  (Eng-gí)
  21. Osborne, Hannah (2019-04-16). "First meteor of interstellar origin discovered by scientists". Newsweek (ēng Eng-gí). 2022-04-11 khòaⁿ--ê. 

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