HD 176425

	HD 176425
Observationsdata; Epok: J2000.0
Stjärnbild	Södra kronan
Rektascension	19t 02m 08,52100s
Deklination	-41° 54′ 37,8260″
Skenbar magnitud ()	6,21 ± 0,01
Stjärntyp
Spektraltyp	A0 V
B–V	+0,00
Astrometri
Radialhastighet ()	-12,8 ± 4,3 km/s
Egenrörelse (µ)	RA: +30,557 mas/år; Dek.: -11,271 mas/år
Parallax ()	9,1110 ± 0,0417
Avstånd	358 ± 2 lå (109,8 ± 0,5 pc)
Absolut magnitud ()	+0,75
Detaljer
Massa	2,63 +0,38−0,30 M☉
Radie	2,19 ± 0,11 R☉
Luminositet	50,8 +0,6−0,7 L☉
Temperatur	10 163 ± 26 K
Metallicitet	-0,10
Ålder	286 ± 7 miljoner år
Andra beteckningar
	38 G Coronae Australis, HD 176425, CD-42 13839, CPD-42 8564, GSC 07925-02685, HIC 93470, HIP 93470, HR 7177, 2MASS J19020851-4154377, PPM 324699, SAO 229446, TD1 23663, TYC 7925-2685-1, uvby98 100176425, Gaia DR2 6715660105830175872aia DR3 6715660105830175872

HD 176425 eller HR 7177, är en ensam stjärna belägen i mellersta delen av stjärnbilden Södra kronan. Den har en skenbar magnitud av ca 6,21^[2] och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 3 på ca 9,11 mas^[1] beräknas den befinna sig på ett avstånd av ca 358 ljusår (ca 110 parsec) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -13 km/s.^[5] Stjärnan minskas på dess nuvarande avstånd i ljusstyrka genom skymning av interstellärt stoft med 0,27 magnitud^[16] och den har en absolut magnitud på +0,75.^[6]

Egenskaper

HD 176425 är en vit till blå stjärna i huvudserien av spektralklass A0 V,^[3] som har använts som en opolariserad standard på den södra stjärnhimlen.^[17] Den har en massa av ca 2,6^[7] solmassor, en radie av ca 2,2^[8] solradier och utsänder energi från dess fotosfär motsvarande ca ^[1] gånger solen vid en effektiv temperatur av ca 10 200^[9] K. Den har en metallicitet med en järnhalt på 79 procent av solens med [Fe/H] = -0,10.^[10]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 176425, 16 juli 2024.

Noter

^ [a b c d e f g h] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 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. S2CID 17128864.
^ [a b] Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H.
^ 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
^ [a b] 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
^ [a b] Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
^ [a b] Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
^ [a b] Westin, T. N. G. (April 1985). "The local system of early type stars. Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99–134. Bibcode:1985A&AS...60...99W. ISSN 0365-0138. S2CID 119020376.
^ [a b] Anders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111.01860. Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369. eISSN 1432-0746. ISSN 0004-6361.
^ Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters. 38 (11): 694–706. arXiv:1606.09028. Bibcode:2012AstL...38..694G. doi:10.1134/S1063773712110035. eISSN 1562-6873. ISSN 1063-7737. S2CID 255202762.
^ Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. eISSN 1562-6873. ISSN 1063-7737. S2CID 118345778.
^ 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.
^ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=HR+7177. Hämtad 2024-11-06.
^ "HD 176425". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 8 juni 2023.
^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711. S2CID 118879856.
^ Gil-Hutton, R.; Benavidez, P. (October 11, 2003). "Southern stars that can be used as unpolarized standards". Monthly Notices of the Royal Astronomical Society. 345 (1). Oxford University Press (OUP): 97–99. Bibcode:2003MNRAS.345...97G. doi:10.1046/j.1365-8711.2003.06957.x. ISSN 0035-8711. S2CID 122407792.

Externa länkar

https://www.universeguide.com/star/93470/hd176425

[A-1] [a b c d e f g h] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 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. S2CID 17128864.

[C-3] [a b] Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H.

[D-4] 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.

[F-6] [a b] 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.

[G-7] [a b] Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.

[H-8] [a b] Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.

[I-9] [a b] Westin, T. N. G. (April 1985). "The local system of early type stars. Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99–134. Bibcode:1985A&AS...60...99W. ISSN 0365-0138. S2CID 119020376.

[J-10] [a b] Anders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111.01860. Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369. eISSN 1432-0746. ISSN 0004-6361.

[K-11] Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters. 38 (11): 694–706. arXiv:1606.09028. Bibcode:2012AstL...38..694G. doi:10.1134/S1063773712110035. eISSN 1562-6873. ISSN 1063-7737. S2CID 255202762.

[L-12] Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. eISSN 1562-6873. ISSN 1063-7737. S2CID 118345778.

[M-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.

[SIMBAD-14] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=HR+7177. Hämtad 2024-11-06.

[N-15] "HD 176425". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 8 juni 2023.

[O-16] Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711. S2CID 118879856.

[P-17] Gil-Hutton, R.; Benavidez, P. (October 11, 2003). "Southern stars that can be used as unpolarized standards". Monthly Notices of the Royal Astronomical Society. 345 (1). Oxford University Press (OUP): 97–99. Bibcode:2003MNRAS.345...97G. doi:10.1046/j.1365-8711.2003.06957.x. ISSN 0035-8711. S2CID 122407792.

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Observationsdata Epok: J2000.0
HD 176425

Stjärnbild	Södra kronan
Rektascension	19^t 02^m 08,52100^s^[1]
Deklination	-41° 54′ 37,8260″^[1]
Skenbar magnitud ( $V$ )	6,21 ± 0,01^[2]
Stjärntyp
Spektraltyp	A0 V^[3]
B–V	+0,00^[4]
Astrometri
Radialhastighet ( $R_{v}$ )	-12,8 ± 4,3^[5] km/s
Egenrörelse (µ)	RA: +30,557^[1] mas/år Dek.: -11,271^[1] mas/år
Parallax ( $\pi$ )	9,1110 ± 0,0417^[1]
Avstånd	358 ± 2 lå (109,8 ± 0,5 pc)
Absolut magnitud ( $M_{V}$ )	+0,75^[6]
Detaljer
Massa	2,63 ^+0,38_−0,30^[7] M_☉
Radie	2,19 ± 0,11^[8] R_☉
Luminositet	50,8 ^+0,6_−0,7^[1] L_☉
Temperatur	10 163 ± 26^[9] K
Metallicitet	-0,10^[10]
Ålder	286 ± 7^[11]^[12] miljoner år
Andra beteckningar
38 G Coronae Australis,^[13] HD 176425, CD-42 13839, CPD-42 8564, GSC 07925-02685, HIC 93470, HIP 93470, HR 7177, 2MASS J19020851-4154377, PPM 324699, SAO 229446, TD1 23663, TYC 7925-2685-1, uvby98 100176425, Gaia DR2 6715660105830175872aia DR3 6715660105830175872^[14]^[15]