HD 46815

	HD 46815
Observationsdata; Epok: J2000.0
Stjärnbild	Duvan
Rektascension	06t 33m 49,4800s
Deklination	-36° 13′ 55,2951″
Skenbar magnitud ()	+5,40 ± 0,01
Stjärntyp
Spektraltyp	K3 III
U–B	+1,72
B–V	+1,42
Astrometri
Radialhastighet ()	+32,2 ± 2,8 km/s
Egenrörelse (µ)	RA: -15,622 mas/år; Dek.: +99,481 mas/år
Parallax ()	7,9846 ± 0,0528
Avstånd	408 ± 3 lå (125,2 ± 0,8 pc)
Absolut magnitud ()	+0,03
Detaljer
Massa	1,17 M☉
Radie	24,15 R☉
Luminositet	180 ± 2 L☉
Temperatur	4 297 ± 122 K
Metallicitet	+0,08 ± 0,02 (Fe/H) dex
Vinkelhastighet	2,3 ± 1,2 km/s
Andra beteckningar
	106 G. Columbae, CD-36 2990, CPD-36 994, GSC 07086-01164, HIC 31299, HIP 31299, HR 2411, IRAS 06320-3611, 2MASS J06334949-3613552, PLX 1536, PPM 282830, SAO 196945, TYC 7086-1164-1, Gaia DR2 5580491384682907264

HD 46815, eller HR 2411, är en ensam stjärna^[15] i den mellersta delen av stjärnbilden Duvan. Den har en skenbar magnitud av ca 5,40^[2] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 3 på ca 8,0 mas,^[1] beräknas den befinna sig på ett avstånd på ca 408 ljusår (ca 125 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 32 km/s.^[5]

Egenskaper

HD 46815 är en röd till orange jättestjärna av spektralklass K3 III,^[3] som befinner sig på den röda jättegrenen. Den har en massa som är ca 1,2^[7] solmassor, en radie som är ca 24^[10] solradier och har ca 180 gånger solens utstrålning av energi^[9] från dess fotosfär vid en effektiv temperatur av ca 4 300 K.^[8] För att vara en jättestjärna har den en låg projicerad rotationshastighet av 2,3 km/s. ^[11]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 36848, 23 juni 2022.

Noter

^ [a b c d e f] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 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.
^ [a b] Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
^ [a b] Mermilliod, J. -C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
^ [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.
^ [a b] 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 c] 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. ISSN 0004-6256.
^ [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ [a b] Eggen, Olin J. (April 1989). "Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population". Publications of the Astronomical Society of the Pacific. 101: 366. Bibcode:1989PASP..101..366E. doi:10.1086/132442. eISSN 1538-3873. ISSN 0004-6280.
^ [a b] 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.
^ 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.
^ HR 2411 (unistra.fr). Hämtad 2022-08-17.
^ "HR 2411". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 15 juni 2022.
^ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711.

[A-1] [a b c d e f] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 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] [a b] Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.

[D-4] [a b] Mermilliod, J. -C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.

[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.

[G-7] [a b] 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 c] 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. ISSN 0004-6256.

[I-9] [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[J-10] [a b] Eggen, Olin J. (April 1989). "Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population". Publications of the Astronomical Society of the Pacific. 101: 366. Bibcode:1989PASP..101..366E. doi:10.1086/132442. eISSN 1538-3873. ISSN 0004-6280.

[K-11] [a b] 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.

[M-12] 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-13] HR 2411 (unistra.fr). Hämtad 2022-08-17.

[L-14] "HR 2411". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 15 juni 2022.

[N-15] Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711.

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Observationsdata Epok: J2000.0
HD 46815

Stjärnbild	Duvan
Rektascension	06^t 33^m 49,4800^s^[1]
Deklination	-36° 13′ 55,2951″^[1]
Skenbar magnitud ( $V$ )	+5,40 ± 0,01^[2]
Stjärntyp
Spektraltyp	K3 III^[3]
U–B	+1,72^[4]
B–V	+1,42^[4]
Astrometri
Radialhastighet ( $R_{v}$ )	+32,2 ± 2,8^[5] km/s
Egenrörelse (µ)	RA: -15,622^[1] mas/år Dek.: +99,481^[1] mas/år
Parallax ( $\pi$ )	7,9846 ± 0,0528^[1]
Avstånd	408 ± 3 lå (125,2 ± 0,8 pc)
Absolut magnitud ( $M_{V}$ )	+0,03^[6]
Detaljer
Massa	1,17^[7] M_☉
Radie	24,15^[8] R_☉
Luminositet	180 ± 2^[9] L_☉
Temperatur	4 297 ± 122^[8] K
Metallicitet	+0,08 ± 0,02 (Fe/H)^[10] dex
Vinkelhastighet	2,3 ± 1,2^[11] km/s
Andra beteckningar
106 G. Columbae,^[12] CD-36 2990, CPD-36 994, GSC 07086-01164, HIC 31299, HIP 31299, HR 2411, IRAS 06320-3611, 2MASS J06334949-3613552, PLX 1536, PPM 282830, SAO 196945, TYC 7086-1164-1, Gaia DR2 5580491384682907264 ^[13]^[14]