HD 84406

HD 84406	Die ligging van HD 84406 in die Groot Beer (in die rooi sirkel).
	Die ligging van HD 84406 in die Groot Beer (in die rooi sirkel).
Sterrebeeld	Groot Beer
Spektraaltipe	G8IV
Soort	Geeldwerg
	Waarnemingsdata (Epog J2000)
Regte klimming	09h 47m 30.55s
Deklinasie	+63° 14′ 52.09″
Skynmagnitude (m)	6,944
Absolute magnitude (M)	2,55
	Besonderhede
Massa (M☉)	1,4
Radius (R☉)	5,1
Ligsterkte (L☉)	13,7
Ouderdom (jaar)	4,5 miljard
Temperatuur (K)	4,905
Afstand (ligjaar)	258,5
Metaalinhoud [Fe/H]	-0,055
	Ander name
	2MASS J09473055+6314520, BD +63 861, Gaia DR2 1063732527272377600, HIP 48034, NLTT 22548, SAO 14987, TYC 4139-971-1
Portaal	Sterrekunde

HD 84406 is 'n ster sowat 258,5 ligjare van die Son af in die sterrebeeld Groot Beer. Dit is 'n ster van spektraaltipe G en het 'n groot eiebeweging.

Op 4 Februarie 2022 was HD 84406 die eerste ster wat deur die James Webb-ruimteteleskoop afgeneem is om die 18 segmente van die teleskoop se primêre spieël te toets en in te stel.^[6]^[7]^[8] Op 11 Februarie 2022 het Nasa die eerste foto's van HD 84406 gepubliseer.^[9]

Verwysings[wysig | wysig bron]

↑ "HYGMap".
↑ Queiroz, A. B. A.; Anders, F.; Chiappini, C.; Khalatyan, A.; Santiago, B. X.; Steinmetz, M.; Valentini, M.; Miglio, A.; Bossini, D.; Barbuy, B.; Minchev, I.; Minniti, D.; García Hernández, D. A.; Schultheis, M.; Beaton, R. L.; Beers, T. C.; Bizyaev, D.; Brownstein, J. R.; Cunha, K.; Fernández-Trincado, J. G.; Frinchaboy, P. M.; Lane, R. R.; Majewski, S. R.; Nataf, D.; Nitschelm, C.; Pan, K.; Roman-Lopes, A.; Sobeck, J. S.; Stringfellow, G.; Zamora, O. (2020). "From the bulge to the outer disc: Star Horse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys". Astronomy & Astrophysics. 638: A76. arXiv:1912.09778. Bibcode:2020A&A...638A..76Q. doi:10.1051/0004-6361/201937364. S2CID 209439697.
↑ ^3,0 ^3,1 ^3,2 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (11 Oktober 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711.
↑ Feuillet, Diane K.; et al. (2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv:1511.04088. Bibcode:2016ApJ...817...40F. doi:10.3847/0004-637X/817/1/40. S2CID 118675933.
↑ Stevens, Daniel J.; Stassun, Keivan G.; Gaudi, B. Scott (29 November 2017). "Empirical Bolometric Fluxes and Angular Diameters of 1.6 Million Tycho-2 Stars and Radii of 350,000 Stars with Gaia DR1 Parallaxes". The Astronomical Journal. 154 (6): 259. arXiv:1708.05025. Bibcode:2017AJ....154..259S. doi:10.3847/1538-3881/aa957b. ISSN 0004-6256.
↑ Dvorsky, George (4 Februarie 2022). "Webb Space Telescope Successfully Sees Its First Glimmer of Light - HD 84406 will go down in history as the first star spotted by the $10 billion space telescope". Gizmodo. Besoek op 4 Februarie 2022.
↑ Boyle, Alan (24 Januarie 2022). "Webb Telescope fires thrusters to settle in at destination, a million miles from Earth". GeekWire. Besoek op 5 Februarie 2022.
↑ Fisher, Alise (27 Januarie 2022). "The Webb Team Looks Back on Successful Deployments". James Webb Space Telescope (NASA Blogs). Besoek op 27 Januarie 2022.
↑ Overbye, Dennis (11 Februarie 2022). "James Webb Telescope Sends Home a Selfie and 18 Images of Starlight - The spacecraft recorded a series of images of a target star that will be used to help its mirrors prepare for scientific research". The New York Times. Besoek op 12 Februarie 2022.

Skakels[wysig | wysig bron]

Hierdie artikel is in sy geheel of gedeeltelik uit die Engelse Wikipedia vertaal.

[1] "HYGMap".

[starhorse-2] Queiroz, A. B. A.; Anders, F.; Chiappini, C.; Khalatyan, A.; Santiago, B. X.; Steinmetz, M.; Valentini, M.; Miglio, A.; Bossini, D.; Barbuy, B.; Minchev, I.; Minniti, D.; García Hernández, D. A.; Schultheis, M.; Beaton, R. L.; Beers, T. C.; Bizyaev, D.; Brownstein, J. R.; Cunha, K.; Fernández-Trincado, J. G.; Frinchaboy, P. M.; Lane, R. R.; Majewski, S. R.; Nataf, D.; Nitschelm, C.; Pan, K.; Roman-Lopes, A.; Sobeck, J. S.; Stringfellow, G.; Zamora, O. (2020). "From the bulge to the outer disc: Star Horse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys". Astronomy & Astrophysics. 638: A76. arXiv:1912.09778. Bibcode:2020A&A...638A..76Q. doi:10.1051/0004-6361/201937364. S2CID 209439697.

[mcdonald2017-3] 3,0 ^3,1 ^3,2 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (11 Oktober 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711.

[apogee-4] Feuillet, Diane K.; et al. (2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv:1511.04088. Bibcode:2016ApJ...817...40F. doi:10.3847/0004-637X/817/1/40. S2CID 118675933.

[stevens2017-5] Stevens, Daniel J.; Stassun, Keivan G.; Gaudi, B. Scott (29 November 2017). "Empirical Bolometric Fluxes and Angular Diameters of 1.6 Million Tycho-2 Stars and Radii of 350,000 Stars with Gaia DR1 Parallaxes". The Astronomical Journal. 154 (6): 259. arXiv:1708.05025. Bibcode:2017AJ....154..259S. doi:10.3847/1538-3881/aa957b. ISSN 0004-6256.

[GZM-20220204-6] Dvorsky, George (4 Februarie 2022). "Webb Space Telescope Successfully Sees Its First Glimmer of Light - HD 84406 will go down in history as the first star spotted by the $10 billion space telescope". Gizmodo. Besoek op 4 Februarie 2022.

[7] Boyle, Alan (24 Januarie 2022). "Webb Telescope fires thrusters to settle in at destination, a million miles from Earth". GeekWire. Besoek op 5 Februarie 2022.

[8] Fisher, Alise (27 Januarie 2022). "The Webb Team Looks Back on Successful Deployments". James Webb Space Telescope (NASA Blogs). Besoek op 27 Januarie 2022.

[NYT-20220211-9] Overbye, Dennis (11 Februarie 2022). "James Webb Telescope Sends Home a Selfie and 18 Images of Starlight - The spacecraft recorded a series of images of a target star that will be used to help its mirrors prepare for scientific research". The New York Times. Besoek op 12 Februarie 2022.

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