HD 179886

	HD 1798886
Observationsdata; Epok: J2000.0
Stjärnbild	Kikaren
Rektascension	19t 16m 21,7422 s
Deklination	-45° 27′ 57,7041″
Skenbar magnitud ()	+5,371 ± 0,09 (v)
Stjärntyp
Spektraltyp	K3 III
B–V	+1,35
Astrometri
Radialhastighet ()	+6,3 ± 0,8 km/s
Egenrörelse (µ)	RA: -3,013 mas/år; Dek.: +10,017 mas/år
Parallax ()	4,6441 ± 0,1537
Avstånd	700 ± 20 lå (215 ± 7 pc)
Absolut magnitud ()	-0,7
Detaljer
Massa	1,11 M☉
Radie	36,75 R☉
Luminositet	365 L☉
Temperatur	4 622 K
Metallicitet	+0,15 (Fe/H) dex
Vinkelhastighet	2,4 ± 1,1 km/s
Andra beteckningar
	51 G. Telescopi, CCDM J19164-4528AB, CD-45 13072, CPD-45 9660, GSC 08375-02571, HD 179886, HIC 94712, HIP 94712, HR 7289, IRAS F19127-4533, IRAS 19127-4533, 2MASS J19162175-4527578, PLX 4479, PPM 324935, SAO 229584, TYC 8375-2571-1, WDS J19164-4528AB, Gaia DR2 6664325728994665088, Gaia EDR3 6664325728994665088

HD 179886 ( eller HR 7289) är en ensam stjärna^[12] i den norra delen av stjärnbilden Kentauren. Den har en skenbar magnitud av ca 5,37^[2] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 4,6^[1] mas, beräknas den befinna sig på ett avstånd på ca 700 ljusår (ca 215 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 6 km/s.^[5]

Egenskaper[redigera | redigera wikitext]

HD 179886 är en orange till gul jättestjärna av spektralklass K3 III.^[3] Den har en massa som är ca 1,1^[7] solmassor, en radie som, baserat på en uppmätt vinkeldiameter av 1,95 ± 0,03 bågsekunder,^[13] är ca 37^[8] solradier på det beräknade avståndet och har ca 365 gånger solens utstrålning av energi^[9] från dess fotosfär vid en effektiv temperatur av ca 4 600 K.^[8]

HD 179886 har en följeslagare som ligger separerad med 0,4 bågsekunder, ^[14] som mest sannolikt dock är en orelaterad bakgrundsstjärna.

Referenser[redigera | redigera wikitext]

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 179886, 8 april 2022.

Noter[redigera | redigera wikitext]

^ [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. 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, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Bibcode:1978mcts.book.....H.
^ Corben, P. M. (1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 30: 37. Bibcode:1971MNSSA..30...37C. ISSN 0024-8266.
^ [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.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (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] 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 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 7289 (unistra.fr) |Hämtad 2022-05-15.
^ Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976
^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005). "CHARM2: An updated Catalog of High Angular Resolution Measurements". Astronomy & Astrophysics. 431 (2): 773–777. Bibcode:2005A&A...431..773R. doi:10.1051/0004-6361:20042039. ISSN 0004-6361.
^ 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.

[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. 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, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Bibcode:1978mcts.book.....H.

[D-4] Corben, P. M. (1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 30: 37. Bibcode:1971MNSSA..30...37C. ISSN 0024-8266.

[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.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (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] 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.

[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 7289 (unistra.fr) |Hämtad 2022-05-15.

[K-12] Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976

[L-13] Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005). "CHARM2: An updated Catalog of High Angular Resolution Measurements". Astronomy & Astrophysics. 431 (2): 773–777. Bibcode:2005A&A...431..773R. doi:10.1051/0004-6361:20042039. ISSN 0004-6361.

[M-14] 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 1798886

Stjärnbild	Kikaren
Rektascension	19^t 16^m 21,7422 ^s^[1]
Deklination	-45° 27′ 57,7041″^[1]
Skenbar magnitud ( $V$ )	+5,371 ± 0,09 (v)^[2]
Stjärntyp
Spektraltyp	K3 III^[3]
B–V	+1,35^[4]
Astrometri
Radialhastighet ( $R_{v}$ )	+6,3 ± 0,8^[5] km/s
Egenrörelse (µ)	RA: -3,013^[1] mas/år Dek.: +10,017^[1] mas/år
Parallax ( $\pi$ )	4,6441 ± 0,1537^[1]
Avstånd	700 ± 20 lå (215 ± 7 pc)
Absolut magnitud ( $M_{V}$ )	-0,7^[6]
Detaljer
Massa	1,11^[7] M_☉
Radie	36,75^[8] R_☉
Luminositet	365^[9] L_☉
Temperatur	4 622^[9] K
Metallicitet	+0,15 (Fe/H)^[9] dex
Vinkelhastighet	2,4 ± 1,1^[10] km/s
Andra beteckningar
51 G. Telescopi, CCDM J19164-4528AB, CD-45 13072, CPD-45 9660, GSC 08375-02571, HD 179886, HIC 94712, HIP 94712, HR 7289, IRAS F19127-4533, IRAS 19127-4533, 2MASS J19162175-4527578, PLX 4479, PPM 324935, SAO 229584, TYC 8375-2571-1, WDS J19164-4528AB, Gaia DR2 6664325728994665088, Gaia EDR3 6664325728994665088 ^[11]