HD 23474

	HD 23474
Observationsdata; Epok: J2000.0
Stjärnbild	Taffelberget
Rektascension	03t 36m 30,1435s
Deklination	-78° 19′ 23,0623″
Skenbar magnitud ()	6,30 ± 0,01
Stjärntyp
Spektraltyp	K2 III
U–B	+1,03
B–V	+1,15
Astrometri
Radialhastighet ()	+2,4 ± 0,4 km/s
Egenrörelse (µ)	RA: -14,12 mas/år; Dek.: +6,67 mas/år
Parallax ()	4,34 ± 0,36
Avstånd	750 ± 60 lå (230 ± 20 pc)
Absolut magnitud ()	-0,50
Detaljer
Massa	1,21 M☉
Radie	33,51 ± 7,44 R☉
Luminositet	227 L☉
Temperatur	4 556 K
Metallicitet	-0,03
Vinkelhastighet	1,2 ± 1,3 km/s
Andra beteckningar
	3 G. Mensae, GC 4400, HD 23474, CPD-78 105, FK5 2261, GSC 09367-00549, HIC 16827, HIP 16827, HR 1154, IRAS 03383-7829, 2MASS J03363016-7819231, PPM 368108, SAO 256005, TYC 9367-549-1, WDS J03365-7819AB, Gaia DR2 4626518194064622208

HD 23474 eller HR 1154, är dubbelstjärna^[14] belägen i den norra delen av stjärnbilden Taffelberget. Den har en skenbar magnitud av ca 6,30^[2] och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 4,3 mas,^[1] beräknas den befinna sig på ett avstånd på ca 750 ljusår (230 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 2,4 km/s.^[5] År 2018 var paret separerade med 0,2 bågsekund vid en positionsvinkel av 92°.^[14]

Egenskaper[redigera | redigera wikitext]

Primärstjärnan HD 23474 A (synliga komponenten) är en orange till gul jättestjärna av spektralklass K2 III.^[1] Den har en massa som är ca 1,2^[7] solmassor, en radie på ca 34^[8] solradier och utsänder från dess fotosfär energi motsvarande 227^[9] gånger solen vid en effektiv temperatur av ca 4 600 K.^[9]

Referenser[redigera | redigera wikitext]

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 23474, 24 februari 2023..

Noter[redigera | redigera wikitext]

^ [a b c d e f g] van Leeuwen, Floor (13 August 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. eISSN 1432-0746. ISSN 0004-6361. Hipparcos record for this source at VizieR.
^ [a b] Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
^ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
^ [a b] Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
^ [a b] Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 255204555.
^ [a b c] Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
^ [a b] Stassun, Keivan G.; et al. (20 August 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. eISSN 1538-3881.
^ [a b c d] McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
^ HR 1154 (unistra.fr). Hämtad 2024-02-08.
^ "HD 23474". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 14 juni 2022.
^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
^ [a b] Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.

Externa länkar[redigera | redigera wikitext]

https://www.universeguide.com/star/star/16827/hd23474.

[A-1] [a b c d e f g] van Leeuwen, Floor (13 August 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. eISSN 1432-0746. ISSN 0004-6361. Hipparcos record for this source at VizieR.

[B-2] [a b] Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.

[C-3] Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.

[D-4] [a b] Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.

[E-5] [a b] Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.

[F-6] Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 255204555.

[G-7] [a b c] Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.

[H-8] [a b] Stassun, Keivan G.; et al. (20 August 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. eISSN 1538-3881.

[I-9] [a b c d] McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.

[J-10] De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.

[SIMBAD-11] HR 1154 (unistra.fr). Hämtad 2024-02-08.

[K-12] "HD 23474". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 14 juni 2022.

[L-13] Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.

[M-14] [a b] Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.

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Observationsdata Epok: J2000.0
HD 23474

Stjärnbild	Taffelberget
Rektascension	03^t 36^m 30,1435^s^[1]
Deklination	-78° 19′ 23,0623″^[1]
Skenbar magnitud ( $V$ )	6,30 ± 0,01^[2]
Stjärntyp
Spektraltyp	K2 III^[3]
U–B	+1,03^[4]
B–V	+1,15^[4]
Astrometri
Radialhastighet ( $R_{v}$ )	+2,4 ± 0,4^[5] km/s
Egenrörelse (µ)	RA: -14,12^[1] mas/år Dek.: +6,67^[1] mas/år
Parallax ( $\pi$ )	4,34 ± 0,36^[1]
Avstånd	750 ± 60 lå (230 ± 20 pc)
Absolut magnitud ( $M_{V}$ )	-0,50^[6]
Detaljer
Massa	1,21^[7] M_☉
Radie	33,51 ± 7,44^[8] R_☉
Luminositet	227^[9] L_☉
Temperatur	4 556^[9] K
Metallicitet	-0,03^[7]
Vinkelhastighet	1,2 ± 1,3^[10] km/s
Andra beteckningar
3 G. Mensae, GC 4400, HD 23474, CPD-78 105, FK5 2261, GSC 09367-00549, HIC 16827, HIP 16827, HR 1154, IRAS 03383-7829, 2MASS J03363016-7819231, PPM 368108, SAO 256005, TYC 9367-549-1, WDS J03365-7819AB, Gaia DR2 4626518194064622208^[11]^[12]^[13]