Altair

Altair
Cineál	réalta, réalta dhúbailte, foinse neas-infridhearg agus foinse UV
Cineál speictreach (réalta)	A7Vn
Réaltbhuíon	an tIolar
Aois	J2000.0
Saintréithe fisiceacha agus réaltmhéadracha
Fad ón Domhan	17 ly
Ga	1.7 R☉
Trastomhas	2,530,000 km
Leacú	0.2
Dearbhmhéid	2.22
Méid dhealraitheach (V)	0.76 (banda V)
Mais	1.7 M☉
Teocht éifeachtach	7,377 K
Saobhdhiallas	194.95 mas
Dualghluaisne (diallas)	385.29 mas/y
Dualghluaisne (dronairde)	536.23 mas/y
Luas rothlaithe réaltach	90.8 km/s
Luas gathach	−26.6 km/s
Imtharraingt dromchla	9,000 cm/s²
Dronairde (α)	19h 50m 46.9986s
Diallas (δ)	8° 52′ 5.9563″
Miotalacht	7.94
Dath	dath B-V= 0.22; dath U-B= 0.08
Lonrachas	10.7 lonrachas na gréine
Aois measta	1,000,000,000 bliain
Cuid de	G-Cloud (en) agus Summer Triangle (en)
Catalóga réalteolaíochta
	SAO 125122 (Smithsonian Astrophysical Observatory Star Catalog (en) ); 2MASS J19504698+0852060 (2MASS); GSC 01058-03399 (Guide Star Catalog (en) ); HD 187642 (catalóg Henry Draper); HIP 97649 (Hipparcos Catalogue (en) ); HR 7557 (Bright Star Catalogue (en) ); IRAS 19483+0844 (IRAS); GJ 768 (Gliese Catalogue of Nearby Stars (en) ); α Aql (Bayer designation (en) ); ADS 13009 A (Aitken Double Star Catalogue (en) ); 1ES 1948+08.7 (Einstein Slew survey, Version No. 1 (en) ); 1RXS J195047.0+085159 (1RXS); ASCC 1075038 (All-sky Compiled Catalogue (en) ); BD+08 4236 (Durchmusterung (en) ); CCDM J19508+0852A (Catalog of Components of Double and Multiple Stars (en) ); FK5 745 (FK5 (en) ); GC 27470 (Boss General Catalogue (en) ); GCRV 12193 (General Catalogue of Stellar Radial Velocities (en) ); HIC 97649 (Hipparcos Input Catalogue (en) ); IDS 19459+0836 A (Index Catalogue of Visual Double Stars (en) ); IRC +10441 (Two-Micron Sky Survey (en) ); JP11 3142 (JP11 (en) ); LFT 1499 (Luyten Five-Tenths catalogue (en) ); LHS 3490 (Luyten Half-Second catalogue (en) ); LSPM J1950+0852 (LSPM-NORTH catalog (en) ); LTT 15795 (Luyten Two-Tenths catalogue (en) ); N30 4388 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ); NLTT 48314 (New Luyten Two-Tenths catalogue (en) ); NSV 24910 (New Catalogue of Suspected Variable Stars (en) ); PLX 4665 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); PLX 4665.00 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); PMC 90-93 530 (Tokyo Photoelectric Meridian Circle Catalog (en) ); PPM 168779 (PPM Star Catalogue (en) ); RAFGL 2463 (The Revised AFGL (RAFGL) catalogue (en) ); ROT 2857 (Catalogue of rotational velocities of the stars (en) ); TD1 25537 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ); TYC 1058-3399-1 (Tycho Catalogue (en) ); UBV 16885 (UBV Photoelectric Photometry Catalogue (en) ); uvby98 100187642 (uvbyβ Photoelectric Photometric Catalogue (en) ); alf Aql (General Catalogue of Variable Stars); WDS J19508+0852A (Washington Double Star Catalog (en) ); Zkh 297 (Zhakozhaj (en) ); Ci 20 1169 (Catalogue of proper motion stars (en) ); PM 19484+0844 (Catalogs of proper-motion stars. I. Stars brighter than visual magnitude 15 and with annual proper motion of 1" or more (en) ); WEB 17173 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ); 53 Aql (Flamsteed designation (en) ); TIC 70257116 (TESS Input Catalog (en) ); AG+08 2636 (AGK3U (en) ); UBV M 24205 (UBV Photoelectric Photometry Catalogue (en) )

S’é Altair (α Aquilae, α Aql) an réalta is gile sa réaltbhuíon Aquila agus an dara réalta déag is gile i spéir na hoíche. Tá sé sa néall–G i láthair na huaire. Is réalta Cineál A den phríomhord é Altair a bhfuil ollméid radharcach fhollasach de 0.77 aige agus é ina cheann de trí rinn an Triantáin Samhraidh. Is iad an bheirt rinn eile ná Deneb agus Vega. Tá sé faoi 16.7 solasbhlianta (5.13 parsoic) ón Domhain agus is ceann de na réaltaí is goire dúinn atá infheicthe don súil nocht. Rothlaíonn Altair go tapaidh, le luas ag an mheánchiorcal de tuairim is 286 clm/s. Nochtaigh staidéar leis an Palomar Triail-leaba Trasnamhéadar nach bhfuil Altair sféarúil ach go bhfuil sé maol treascartha ag na mólanna de bharr a ard ráta imrothlaithe. Dhearbhaigh staidéir trasnamhéadaracha eile le teileascóip iolracha ag oibriú san fhodhearg an feiniméan seo.

Sonra Breathnaithe

Réaltbhuíon Aquila

Ceartéirí 19u 50n 46.99855s

Díochlaonadh +08° 52′ 05.9563″

Méid Fhollasach 0.76

Cailíochtaí

Céim éabhlóideach Príomh ord

Cineál speictreach A7 V

U−B Innéacs daith +0.09[2]

B−V Innéacs daith +0.22[2]

V−R Innéacs daith +0.14[2]

R−I Innéacs daith +0.13[2]

Cineál athróige Delta Scuti

Réaltmhéadracht

Luas gathach −26.1 ± 0.9[3] clm/s

Saobhdhiallas 194.95 ± 0.57

cianfhad 16.73 ± 0.05 (5.13 ± 0.01

Dearbhmhéid 2.22

Mionphointí

Mais 1.79 ± 0.018 M☉

Ga 1.63 to 2.03 R☉

Lonrachas 10.6 L☉

Imtharraingt dhromchlach (log g) 4.29 cgs

Teocht 6,900 to 8,500 K

Cóimheas miotalach [Fe/H] −0.2 dex

Rothlú 8.9 hours[6]

Luas rothlaithe (v sin i) 240[5] clm/s

Aois 630[4] Msbh

Ainmneacha eile

Atair, α Aquilae, α Aql, Alpha Aquilae, Alpha Aql, 53 Aquilae, 53 Aql, BD+08°4236, FK5 745, GCTP 4665.00, GJ 768, HD 187642, HIP 97649, HR 7557, LFT 1499, LHS 3490, LTT 15795, NLTT 48314, SAO 125122, WDS 19508+0852A.[3][8][9]

Tagairtí stórsonracha SIMBAD sonra

↑ Christopher J. Corbally (Deireadh Fómhair 2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I" (as Béarla) (4): 2048–2059. doi:10.1086/378365.
↑ Henrique Schmitt (20 Nollaig 2017). "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer" (as Béarla) (1): 30-45. doi:10.3847/1538-3881/AA9D8B.
↑ URL tagartha: https://iopscience.iop.org/article/10.1086/322340.
↑ Ráite i: Catalogue of Stellar Photometry in Johnson's 11-color system. Stated in source according to: SIMBAD. Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: 2002.
↑ ^5.0 ^5.1 ^5.2 "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants" (21 Nollaig 2016) (1). doi:10.3847/1538-3881/153/1/21.
↑ ^6.0 ^6.1 ^6.2 ^6.3 ^6.4 Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction" (as Béarla) (2): 653–664. doi:10.1051/0004-6361:20078357.
↑ "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system" (as Béarla) (Samhain 2006) (11): 759–771. doi:10.1134/S1063773706110065.
↑ "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants" (21 Nollaig 2016) (1). doi:10.3847/1538-3881/153/1/21.

[99376777ed08f03277fd2305e1e490f7764e49c3-1] Christopher J. Corbally (Deireadh Fómhair 2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I" (as Béarla) (4): 2048–2059. doi:10.1086/378365.

[7239f0761649ada51aa4bb9951c94ed01e30e0d4-2] Henrique Schmitt (20 Nollaig 2017). "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer" (as Béarla) (1): 30-45. doi:10.3847/1538-3881/AA9D8B.

[1ff17917e3f72025296e98f2a94b88e8f3e6aea1-3] URL tagartha: https://iopscience.iop.org/article/10.1086/322340.

[a1b1b6b07c06876959d87fc2f8c07203d5b512f3-4] Ráite i: Catalogue of Stellar Photometry in Johnson's 11-color system. Stated in source according to: SIMBAD. Teanga an tsaothair nó an ainm: Béarla. Dáta foilsithe: 2002.

[bd2a71104e373ac322e3d44720f2532f6e28db17-5] 5.0 ^5.1 ^5.2 "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants" (21 Nollaig 2016) (1). doi:10.3847/1538-3881/153/1/21.

[8edd049ced48440d6882cc10b733308727e81acc-6] 6.0 ^6.1 ^6.2 ^6.3 ^6.4 Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction" (as Béarla) (2): 653–664. doi:10.1051/0004-6361:20078357.

[e4ae596e5e49019b6148474aa8b1d0498039646f-7] "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system" (as Béarla) (Samhain 2006) (11): 759–771. doi:10.1134/S1063773706110065.

[c30dc072cba1cfbcdae32e884a7fbd44d1d93767-8] "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants" (21 Nollaig 2016) (1). doi:10.3847/1538-3881/153/1/21.

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