HD 11928

	HD 11928
Observationsdata; Epok: J2000.0
Stjärnbild	Triangeln
Rektascension	01t 57m 43,74417s
Deklination	+27° 48′ 15,7579″
Skenbar magnitud ()	5,84 - 5,85
Stjärntyp
Spektraltyp	M2 III
B–V	+1,60
Variabeltyp	Misstänkt variabel
Astrometri
Radialhastighet ()	-1,93 ± 0,22 km/s
Egenrörelse (µ)	RA: +12,974 mas/år; Dek.: -60,043 mas/år
Parallax ()	6,1432 ± 0,1953
Avstånd	530 ± 20 lå (163 ± 5 pc)
Absolut magnitud ()	+0,11
Detaljer
Radie	52,68 R☉
Luminositet	485 ± 17 L☉
Temperatur	3 656 ± 72 K
Andra beteckningar
	HD 11928, AG+27 211, BD+27 310, DO 8991, GSC 01763-03031, HIC 9132, HIP 9132, HR 564, IRAS 01548+2733, IRC +30032, 2MASS J01574374+2748157, NSV 15408, PPM 91231, RAFGL 274, SAO 75048, TYC 1763-3031-1, Gaia DR2 298255246433219456, Gaia DR3 298255246433219456

HD 11928 eller HR 564, är en ensam stjärna^[12] belägen i södra delen av stjärnbilden Triangeln. Den har en skenbar magnitud av ca 5,85^[13] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 3 på ca 6,14 mas^[1] beräknas den befinna sig på ett avstånd av ca 530 ljusår (ca 163 parsec) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -2 km/s.^[5] På dess nuvarande avstånd minskas stjärnans ljusstyrka genom skymning av interstellärt stoft med 0,13 magnitud^[14] och den har en absolut magnitud på +0,11.^[6]

Observation

År 1997 observerade Hipparcos-satelliten att stjärnan varierade från 5,89 till 5,93 i Hipparcos passband.^[15] Ytterligare observationer av Koen & Eyer visar att HD 11928 varierar mellan 5,84 och 5,85 i det visuella passbandet med en period av 50,7 dygn.^[16] Sedan 2004 har dock dess variabilitet inte bekräftats (2024),^[17] men den misstänks fortfarande vara variabel.

Egenskaper

HD 11928 är en röd till orange jättestjärna av spektralklass M2 III,^[18] som för närvarande ligger på den asymptotiska jättegrenen och genererar energi genom nukleär fusion av väte- och heliumskal kring en inert kolkärna. Den har en radie av ca 53^[7] solradier och utsänder energi från dess fotosfär motsvarande ca 485^[8] gånger solen vid en effektiv temperatur av ca 3 700^[9] K.

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 11928, 25 juni 2024.

Noter

^ [a b c d e f] 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] Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. eISSN 1562-6881. ISSN 1063-7729. S2CID 125853869.
^ Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode:1950ApJ...111..221W. doi:10.1086/145261. eISSN 1538-4357. ISSN 0004-637X. S2CID 122883647.
^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H. S2CID 231475662.
^ [a b] Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
^ [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] 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] van Belle, G. T.; Lane, B. F.; Thompson, R. R.; Boden, A. F.; Colavita, M. M.; Dumont, P. J.; Mobley, D. W.; Palmer, D.; Shao, M.; Vasisht, G. X.; Wallace, J. K.; Creech-Eakman, M. J.; Koresko, C. D.; Kulkarni, S. R.; Pan, X. P.; Gubler, J. (1999). "Radii and Effective Temperatures for G, K, and M Giants and Supergiants". The Astronomical Journal. 117 (1): 521–533. Bibcode:1999AJ....117..521V. doi:10.1086/300677. S2CID 18617983.
^ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=HR+564 Hämtad 2024-11-30.
^ "HD 11928". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 11 maj 2024.
^ 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. S2CID 14878976.
^ 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.
^ 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.
^ Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; van Leeuwen, F. (July 1997). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. ISSN 0004-6361.
^ Koen, Chris; Eyer, Laurent (March 2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331 (1): 45–59. arXiv:astro-ph/0112194. Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x. eISSN 1365-2966. ISSN 0035-8711. S2CID 10505995.
^ Samus, N. N.; Durlevich, O. V. (November 2004). "VizieR Online Data Catalog: Combined General Catalogue of Variable Stars (Samus+ 2004)". VizieR Online Data Catalog: II/250. Bibcode:2004yCat.2250....0S.
^ Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239. ISSN 0004-6256. S2CID 121672252.

[A-1] [a b c d e f] 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] Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. eISSN 1562-6881. ISSN 1063-7729. S2CID 125853869.

[D-3] Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode:1950ApJ...111..221W. doi:10.1086/145261. eISSN 1538-4357. ISSN 0004-637X. S2CID 122883647.

[E-4] Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H. S2CID 231475662.

[F-5] [a b] Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.

[G-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.

[H-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.

[I-8] [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.

[K-9] [a b] van Belle, G. T.; Lane, B. F.; Thompson, R. R.; Boden, A. F.; Colavita, M. M.; Dumont, P. J.; Mobley, D. W.; Palmer, D.; Shao, M.; Vasisht, G. X.; Wallace, J. K.; Creech-Eakman, M. J.; Koresko, C. D.; Kulkarni, S. R.; Pan, X. P.; Gubler, J. (1999). "Radii and Effective Temperatures for G, K, and M Giants and Supergiants". The Astronomical Journal. 117 (1): 521–533. Bibcode:1999AJ....117..521V. doi:10.1086/300677. S2CID 18617983.

[SIMBAD-10] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=HR+564 Hämtad 2024-11-30.

[L-11] "HD 11928". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 11 maj 2024.

[M-12] 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. S2CID 14878976.

[N-13] 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.

[O-14] 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-15] Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; van Leeuwen, F. (July 1997). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. ISSN 0004-6361.

[Q-16] Koen, Chris; Eyer, Laurent (March 2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331 (1): 45–59. arXiv:astro-ph/0112194. Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x. eISSN 1365-2966. ISSN 0035-8711. S2CID 10505995.

[R-17] Samus, N. N.; Durlevich, O. V. (November 2004). "VizieR Online Data Catalog: Combined General Catalogue of Variable Stars (Samus+ 2004)". VizieR Online Data Catalog: II/250. Bibcode:2004yCat.2250....0S.

[C-18] Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239. ISSN 0004-6256. S2CID 121672252.

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Observationsdata Epok: J2000.0
HD 11928

Stjärnbild	Triangeln
Rektascension	01^t 57^m 43,74417^s^[1]
Deklination	+27° 48′ 15,7579″^[1]
Skenbar magnitud ( $V$ )	5,84 - 5,85^[2]
Stjärntyp
Spektraltyp	M2 III^[3]
B–V	+1,60^[4]
Variabeltyp	Misstänkt variabel^[2]
Astrometri
Radialhastighet ( $R_{v}$ )	-1,93 ± 0,22^[5] km/s
Egenrörelse (µ)	RA: +12,974^[1] mas/år Dek.: -60,043^[1] mas/år
Parallax ( $\pi$ )	6,1432 ± 0,1953^[1]
Avstånd	530 ± 20 lå (163 ± 5 pc)
Absolut magnitud ( $M_{V}$ )	+0,11^[6]
Detaljer
Radie	52,68^[7] R_☉
Luminositet	485 ± 17^[8] L_☉
Temperatur	3 656 ± 72^[9] K
Andra beteckningar
HD 11928, AG+27 211, BD+27 310, DO 8991, GSC 01763-03031, HIC 9132, HIP 9132, HR 564, IRAS 01548+2733, IRC +30032, 2MASS J01574374+2748157, NSV 15408, PPM 91231, RAFGL 274, SAO 75048, TYC 1763-3031-1, Gaia DR2 298255246433219456, Gaia DR3 298255246433219456^[10]^[11]