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HR 8526

January 01, 1970

HR 8526, also known as HD 212168, is the primary of a triple star located in the southern circumpolar constellation Octans. The star and its companion have apparent magnitudes of 6.12 and 9.36 respectively.[2][4] The system is located relatively close at a distance of 76 light years based on Gaia DR3 parallax measurements,[3][1] but is receding with a heliocentric radial velocity of 15 km/s.[8][9]

HR 8526
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Octans
A
Right ascension 22h 25m 51.15504s[1]
Declination −75° 00′ 56.4763″[1]
Apparent magnitude (V) 6.12±0.01[2]
B
Right ascension 22h 25m 56.54954s[3]
Declination −75° 00′ 52.3437″[3]
Apparent magnitude (V) 9.35[4]
Characteristics
A
Spectral type G0 V[5]
U−B color index +0.14[6]
B−V color index +0.64[6]
B
Spectral type K2V[7]
Astrometry
A
Radial velocity (Rv)15±0.2[8] km/s
Proper motion (μ) RA: +57.385 mas/yr[1]
Dec.: +12.835 mas/yr[1]
Parallax (π)42.7219 ± 0.0196 mas[1]
Distance76.34 ± 0.04 ly
(23.41 ± 0.01 pc)
Absolute magnitude (MV)+4.31[4]
B
Radial velocity (Rv)15±0.5[9] km/s
Proper motion (μ) RA: +33.330 mas/yr[3]
Dec.: −3.785 mas/yr[3]
Parallax (π)42.692 ± 0.2479 mas[3]
Distance76.4 ± 0.4 ly
(23.4 ± 0.1 pc)
Absolute magnitude (MV)+6.92[10]
Orbit[11]
PrimaryBa
CompanionBb
Period (P)11 yr
Semi-major axis (a)0.254″
Inclination (i)87.3°
Longitude of the node (Ω)235°
Periastron epoch (T)2022.21
Argument of periastron (ω)
(secondary)		270°
Details
A
Mass1.05+0.04
−0.03[12] M☉
Radius1.17[13] R☉
Luminosity1.57[14] L☉
Surface gravity (log g)4.29±0.04[12] cgs
Temperature5,935[15] K
Metallicity [Fe/H]+0.02±0.06[12] dex
Rotational velocity (v sin i)3.6[16] km/s
Age4.7[17] Gyr
B
Mass0.76 (combined)[18] M☉
Other designations
72 G. Octantis[19], CD−75°1241, CPD−75°1748, HD 212168, HR 8526, WDS J22259-7501AB[20]
A: FK5 3789, GC 31308, HIP 110712, SAO 258036
B: HIP 110719
Database references
SIMBADA
B

This is a Sun-like star with a stellar classification of G0 V.[5] It has 105% the mass of the Sun[12] and 117% its girth.[13] It radiates 157% the luminosity of the Sun[14] from its photosphere at an effective temperature of 5,935 K,[15] giving it a whitish-yellow hue. HR 8526 has an iron abundance similar to the Sun's[12] and spins modestly with a projected rotational velocity of 3.6 km/s.[16] HD 212168 has a similar age to the Sun; the former is 4.7 billion years old[17] while the latter is 4.6 billion years old.

The B subsystem is located 14″ away along a position angle of 78°.[21] It has a combined mass 76% that of the Sun[18] and take roughly 11 years to orbit each other.[11] Spectral classifications for this star vary from G0-V to K2V.[7][22] The G0 class has been used as an argument that the two visible components form a purely optical pair,[23] but this has been dismissed as mis-identification or contamination and that the actual spectral class is early or mid K.[10]

DENIS J222644.3-750342 is a cool M8 red dwarf[24] located 264 arcseconds away from HR 8526.[21] In 2012, J.A. Caballero identified it as a companion to the AB system, making it a quadruple star system.[10]

References edit

  1. ^ a b c d e 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.
  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.
  3. ^ a b c d e 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.
  4. ^ a b c 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.
  5. ^ a b Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  6. ^ 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.
  7. ^ a b Tokovinin, Andrei (23 February 2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5. eISSN 1538-4365.
  8. ^ 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.
  9. ^ a b Valenti, Jeff A.; Fischer, Debra A. (July 2005). "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs". The Astrophysical Journal Supplement Series. 159 (1): 141–166. Bibcode:2005ApJS..159..141V. doi:10.1086/430500. eISSN 1538-4365. ISSN 0067-0049.
  10. ^ a b c Caballero, J. A.; Montes, D. (2012). "Cool dwarfs in wide multiple systems - Paper 2: A distant M8.5 V companion to HD 212168 AB". The Observatory. 132 (3): 176. arXiv:1203.4272. Bibcode:2012Obs...132..176C.
  11. ^ a b Tokovinin, Andrei; Mason, Brian D.; Mendez, Rene A.; Horch, Elliott P.; Briceño, Cesar (8 July 2019). "Speckle Interferometry at SOAR in 2018". The Astronomical Journal. 158 (1): 48. arXiv:1905.10436. Bibcode:2019AJ....158...48T. doi:10.3847/1538-3881/ab24e4. eISSN 1538-3881.
  12. ^ a b c d e Ramírez, I.; Fish, J. R.; Lambert, D. L.; Allende Prieto, C. (13 August 2012). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal. 756 (1): 46. arXiv:1207.0499. Bibcode:2012ApJ...756...46R. doi:10.1088/0004-637X/756/1/46. eISSN 1538-4357. ISSN 0004-637X.
  13. ^ a b Ghezzi, L.; Cunha, K.; Smith, V. V.; de Araújo, F. X.; Schuler, S. C.; de la Reza, R. (19 August 2010). "Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity". The Astrophysical Journal. 720 (2): 1290–1302. arXiv:1007.2681. Bibcode:2010ApJ...720.1290G. doi:10.1088/0004-637X/720/2/1290. eISSN 1538-4357. ISSN 0004-637X.
  14. ^ a b 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. eISSN 1365-2966. ISSN 0035-8711.
  15. ^ a b Netopil, Martin (4 May 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society. 469 (3): 3042–3055. arXiv:1705.00883. Bibcode:2017MNRAS.469.3042N. doi:10.1093/mnras/stx1077. eISSN 1365-2966. ISSN 0035-8711.
  16. ^ a b Llorente de Andrés, F.; Chavero, C.; de la Reza, R.; Roca-Fàbrega, S.; Cifuentes, C. (October 2021). "The evolution of lithium in FGK dwarf stars". Astronomy & Astrophysics. 654: A137. arXiv:2108.05852. Bibcode:2021A&A...654A.137L. doi:10.1051/0004-6361/202141339. eISSN 1432-0746. ISSN 0004-6361.
  17. ^ a b Bensby, T.; Feltzing, S.; Oey, M. S. (February 2014). "Exploring the Milky Way stellar disk". Astronomy & Astrophysics. 562: A71. arXiv:1309.2631. Bibcode:2014A&A...562A..71B. doi:10.1051/0004-6361/201322631. eISSN 1432-0746. ISSN 0004-6361.
  18. ^ a b Tokovinin, Andrei (14 March 2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal. 147 (4): 87. arXiv:1401.6827. Bibcode:2014AJ....147...87T. doi:10.1088/0004-6256/147/4/87. eISSN 1538-3881. ISSN 0004-6256.
  19. ^ 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.
  20. ^ "HR 8526". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 4, 2022.
  21. ^ 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.
  22. ^ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009- )". VizieR On-line Data Catalog. Bibcode:2014yCat....1.2023S.
  23. ^ Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
  24. ^ Neill Reid, I.; Cruz, Kelle L.; Kirkpatrick, J. Davy; Allen, Peter R.; Mungall, F.; Liebert, James; Lowrance, Patrick; Sweet, Anne (15 August 2008). "Meeting the Cool Neighbors. X. Ultracool Dwarfs from the 2MASS All-Sky Data Release". The Astronomical Journal. 136 (3): 1290–1311. arXiv:0806.3413. Bibcode:2008AJ....136.1290R. doi:10.1088/0004-6256/136/3/1290. eISSN 1538-3881. ISSN 0004-6256.

January 01, 1970
8526, also, known, 212168, primary, triple, star, located, southern, circumpolar, constellation, octans, star, companion, have, apparent, magnitudes, respectively, system, located, relatively, close, distance, light, years, based, gaia, parallax, measurements,. HR 8526 also known as HD 212168 is the primary of a triple star located in the southern circumpolar constellation Octans The star and its companion have apparent magnitudes of 6 12 and 9 36 respectively 2 4 The system is located relatively close at a distance of 76 light years based on Gaia DR3 parallax measurements 3 1 but is receding with a heliocentric radial velocity of 15 km s 8 9 HR 8526 Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation Octans A Right ascension 22h 25m 51 15504s 1 Declination 75 00 56 4763 1 Apparent magnitude V 6 12 0 01 2 B Right ascension 22h 25m 56 54954s 3 Declination 75 00 52 3437 3 Apparent magnitude V 9 35 4 Characteristics A Spectral type G0 V 5 U B color index 0 14 6 B V color index 0 64 6 B Spectral type K2V 7 AstrometryARadial velocity Rv 15 0 2 8 km sProper motion m RA 57 385 mas yr 1 Dec 12 835 mas yr 1 Parallax p 42 7219 0 0196 mas 1 Distance76 34 0 04 ly 23 41 0 01 pc Absolute magnitude MV 4 31 4 BRadial velocity Rv 15 0 5 9 km sProper motion m RA 33 330 mas yr 3 Dec 3 785 mas yr 3 Parallax p 42 692 0 2479 mas 3 Distance76 4 0 4 ly 23 4 0 1 pc Absolute magnitude MV 6 92 10 Orbit 11 PrimaryBaCompanionBbPeriod P 11 yrSemi major axis a 0 254 Inclination i 87 3 Longitude of the node W 235 Periastron epoch T 2022 21Argument of periastron w secondary 270 DetailsAMass1 05 0 04 0 03 12 M Radius1 17 13 R Luminosity1 57 14 L Surface gravity log g 4 29 0 04 12 cgsTemperature5 935 15 KMetallicity Fe H 0 02 0 06 12 dexRotational velocity v sin i 3 6 16 km sAge4 7 17 GyrBMass0 76 combined 18 M Other designations72 G Octantis 19 CD 75 1241 CPD 75 1748 HD 212168 HR 8526 WDS J22259 7501AB 20 A FK5 3789 GC 31308 HIP 110712 SAO 258036B HIP 110719 Database referencesSIMBADAB This is a Sun like star with a stellar classification of G0 V 5 It has 105 the mass of the Sun 12 and 117 its girth 13 It radiates 157 the luminosity of the Sun 14 from its photosphere at an effective temperature of 5 935 K 15 giving it a whitish yellow hue HR 8526 has an iron abundance similar to the Sun s 12 and spins modestly with a projected rotational velocity of 3 6 km s 16 HD 212168 has a similar age to the Sun the former is 4 7 billion years old 17 while the latter is 4 6 billion years old The B subsystem is located 14 away along a position angle of 78 21 It has a combined mass 76 that of the Sun 18 and take roughly 11 years to orbit each other 11 Spectral classifications for this star vary from G0 V to K2V 7 22 The G0 class has been used as an argument that the two visible components form a purely optical pair 23 but this has been dismissed as mis identification or contamination and that the actual spectral class is early or mid K 10 DENIS J222644 3 750342 is a cool M8 red dwarf 24 located 264 arcseconds away from HR 8526 21 In 2012 J A Caballero identified it as a companion to the AB system making it a quadruple star system 10 References edit a b c d e 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 amp A 674A 1G doi 10 1051 0004 6361 202243940 S2CID 244398875 Gaia DR3 record for this source at VizieR a b Hog 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 amp A 355L 27H ISSN 0004 6361 a b c d e 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 amp A 674A 1G doi 10 1051 0004 6361 202243940 S2CID 244398875 Gaia DR3 record for this source at VizieR a b c 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 Gray R O Corbally C J Garrison R F McFadden M T Bubar E J McGahee C E O Donoghue A A Knox E R 2 June 2006 Contributions to the Nearby Stars NStars Project Spectroscopy of Stars Earlier than M0 within 40 pc The Southern Sample The Astronomical Journal 132 1 161 170 arXiv astro ph 0603770 Bibcode 2006AJ 132 161G doi 10 1086 504637 eISSN 1538 3881 ISSN 0004 6256 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 Tokovinin Andrei 23 February 2018 The Updated Multiple Star Catalog The Astrophysical Journal Supplement Series 235 1 6 arXiv 1712 04750 Bibcode 2018ApJS 235 6T doi 10 3847 1538 4365 aaa1a5 eISSN 1538 4365 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 Valenti Jeff A Fischer Debra A July 2005 Spectroscopic Properties of Cool Stars SPOCS I 1040 F G and K Dwarfs from Keck Lick and AAT Planet Search Programs The Astrophysical Journal Supplement Series 159 1 141 166 Bibcode 2005ApJS 159 141V doi 10 1086 430500 eISSN 1538 4365 ISSN 0067 0049 a b c Caballero J A Montes D 2012 Cool dwarfs in wide multiple systems Paper 2 A distant M8 5 V companion to HD 212168 AB The Observatory 132 3 176 arXiv 1203 4272 Bibcode 2012Obs 132 176C a b Tokovinin Andrei Mason Brian D Mendez Rene A Horch Elliott P Briceno Cesar 8 July 2019 Speckle Interferometry at SOAR in 2018 The Astronomical Journal 158 1 48 arXiv 1905 10436 Bibcode 2019AJ 158 48T doi 10 3847 1538 3881 ab24e4 eISSN 1538 3881 a b c d e Ramirez I Fish J R Lambert D L Allende Prieto C 13 August 2012 Lithium Abundances in nearby FGK Dwarf and Subgiant Stars Internal Destruction Galactic Chemical Evolution and Exoplanets The Astrophysical Journal 756 1 46 arXiv 1207 0499 Bibcode 2012ApJ 756 46R doi 10 1088 0004 637X 756 1 46 eISSN 1538 4357 ISSN 0004 637X a b Ghezzi L Cunha K Smith V V de Araujo F X Schuler S C de la Reza R 19 August 2010 Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets A Possible Dependence of Planetary Mass on Metallicity The Astrophysical Journal 720 2 1290 1302 arXiv 1007 2681 Bibcode 2010ApJ 720 1290G doi 10 1088 0004 637X 720 2 1290 eISSN 1538 4357 ISSN 0004 637X a b 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 eISSN 1365 2966 ISSN 0035 8711 a b Netopil Martin 4 May 2017 Metallicity calibrations for dwarf stars and giants in the Geneva photometric system Monthly Notices of the Royal Astronomical Society 469 3 3042 3055 arXiv 1705 00883 Bibcode 2017MNRAS 469 3042N doi 10 1093 mnras stx1077 eISSN 1365 2966 ISSN 0035 8711 a b Llorente de Andres F Chavero C de la Reza R Roca Fabrega S Cifuentes C October 2021 The evolution of lithium in FGK dwarf stars Astronomy amp Astrophysics 654 A137 arXiv 2108 05852 Bibcode 2021A amp A 654A 137L doi 10 1051 0004 6361 202141339 eISSN 1432 0746 ISSN 0004 6361 a b Bensby T Feltzing S Oey M S February 2014 Exploring the Milky Way stellar disk Astronomy amp Astrophysics 562 A71 arXiv 1309 2631 Bibcode 2014A amp A 562A 71B doi 10 1051 0004 6361 201322631 eISSN 1432 0746 ISSN 0004 6361 a b Tokovinin Andrei 14 March 2014 From Binaries to Multiples II Hierarchical Multiplicity of F and G Dwarfs The Astronomical Journal 147 4 87 arXiv 1401 6827 Bibcode 2014AJ 147 87T doi 10 1088 0004 6256 147 4 87 eISSN 1538 3881 ISSN 0004 6256 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 8526 SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved November 4 2022 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 Skiff B A 2014 VizieR Online Data Catalog Catalogue of Stellar Spectral Classifications Skiff 2009 VizieR On line Data Catalog Bibcode 2014yCat 1 2023S Gray R O et al July 2006 Contributions to the Nearby Stars NStars Project spectroscopy of stars earlier than M0 within 40 pc The Southern Sample The Astronomical Journal 132 1 161 170 arXiv astro ph 0603770 Bibcode 2006AJ 132 161G doi 10 1086 504637 S2CID 119476992 Neill Reid I Cruz Kelle L Kirkpatrick J Davy Allen Peter R Mungall F Liebert James Lowrance Patrick Sweet Anne 15 August 2008 Meeting the Cool Neighbors X Ultracool Dwarfs from the 2MASS All Sky Data Release The Astronomical Journal 136 3 1290 1311 arXiv 0806 3413 Bibcode 2008AJ 136 1290R doi 10 1088 0004 6256 136 3 1290 eISSN 1538 3881 ISSN 0004 6256 Retrieved from https en wikipedia org w index php title HR 8526 amp oldid 1193728635, wikipedia, wiki, book, books, library,

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