The star system is 6.6 degrees north of the ecliptic and so is within the margin of occultations of few if any planets but is well within that of the Moon.[10] The celestial latitude of either of the Alpha Capricorni main stars is about 6.93 degrees by comparison.[11] The system is calculated to be a distance of 253 light-years from the Sun based on parallax.
The two components are designated Nu Capricorni A and B. Component A is formally named Alshat/ˈælʃæt/, the traditional name for the system)[12]
The system bore the traditional name Alshat, from the Arabic الشاة aš-šā[t], meaning 'the sheep' that was to be slaughtered by the adjacent Beta¹ Capricorni (Dabih).[15] In 2016, the IAU organized a Working Group on Star Names (WGSN)[16] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[17] It approved the name Alshat for the component Nu Capricorni A on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.[12]
Referencesedit
^ abcdevan Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
^ abcdJohnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
^Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, vol. 4, Bibcode:1988mcts.book.....H.
^ abcEggleton, 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.
^Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
^White, Nathaniel M.; Feierman, Barry H. (September 1987), "A Catalog of Stellar Angular Diameters Measured by Lunar Occultation", Astronomical Journal, 94: 751, Bibcode:1987AJ.....94..751W, doi:10.1086/114513.
^ ab"Naming Stars". IAU.org. Retrieved 16 December 2017.
^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.
^Hessman, F. V.; Dhillon, V. S.; Winget, D. E.; Schreiber, M. R.; Horne, K.; Marsh, T. R.; Guenther, E.; Schwope, A.; Heber, U. (2010). "On the naming convention used for multiple star systems and extrasolar planets". arXiv:1012.0707 [astro-ph.SR].
^Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York: Dover Publications Inc. p. 142. ISBN0-486-21079-0. Retrieved 2010-12-12.
^"IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
^"WG Triennial Report (2015-2018) - Star Names" (PDF). p. 5. Retrieved 2018-07-14.
March 07, 2024
capricorni, capricorni, binary, star, system, southern, constellation, capricornus, visible, naked, with, apparent, visual, magnitude, location, capricorni, circled, naked, double, capricorniobservation, dataepoch, j2000, equinox, j2000, icrs, constellation, c. Nu Capricorni or n Capricorni is a binary star 4 system in the southern constellation of Capricornus It is visible to the naked eye with an apparent visual magnitude of 4 76 2 Nu CapricorniLocation of n Capricorni circled to the ESE of the naked eye double a CapricorniObservation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation CapricornusRight ascension 20h 20m 39 81562s 1 Declination 12 45 32 6844 1 Apparent magnitude V 4 76 2 CharacteristicsSpectral type B9 IV 3 or B9 5 V 4 U B color index 0 11 2 B V color index 0 04 2 AstrometryRadial velocity Rv 1 00 5 km sProper motion m RA 14 74 1 mas yr Dec 14 32 1 mas yrParallax p 12 88 0 27 mas 1 Distance253 5 ly 78 2 pc Absolute magnitude MV 0 32 6 Detailsn Cap AMass2 37 7 M Luminosity87 6 L Surface gravity log g 3 97 7 cgsTemperature10 461 356 7 KMetallicity Fe H 0 15 0 04 6 dexRotational velocity v sin i 24 8 km sAge115 7 MyrOther designationsAlshat n Cap Nu Cap 8 Cap BD 13 5642 HD 193432 HIP 100310 HR 7773 SAO 163468 ADS 13714 WDS J20207 1246A 9 Database referencesSIMBADdataAttributes editThe star system is 6 6 degrees north of the ecliptic and so is within the margin of occultations of few if any planets but is well within that of the Moon 10 The celestial latitude of either of the Alpha Capricorni main stars is about 6 93 degrees by comparison 11 The system is calculated to be a distance of 253 light years from the Sun based on parallax The two components are designated Nu Capricorni A and B Component A is formally named Alshat ˈ ae l ʃ ae t the traditional name for the system 12 The primary component A is a blue white hued B type main sequence or subgiant star with an apparent magnitude of 4 77 Component B is a magnitude 11 8 star at an angular separation of 54 1 arcseconds from the primary 4 Gaia Data Release 2 shows the companion to be much further away from Earth 13 Nomenclature editn Capricorni Latinised to Nu Capricorni is the system s Bayer designation The designations of the two components as Nu Capricorni A and B derive from the convention used by the Washington Multiplicity Catalog WMC for multiple star systems and adopted by the International Astronomical Union IAU 14 The system bore the traditional name Alshat from the Arabic الشاة as sa t meaning the sheep that was to be slaughtered by the adjacent Beta Capricorni Dabih 15 In 2016 the IAU organized a Working Group on Star Names WGSN 16 to catalog and standardize proper names for stars The WGSN decided to attribute proper names to individual stars rather than entire multiple systems 17 It approved the name Alshat for the component Nu Capricorni A on 30 June 2017 and it is now so included in the List of IAU approved Star Names 12 References edit a b c d e van Leeuwen F 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b c d Johnson H L et al 1966 UBVRIJKL photometry of the bright stars Communications of the Lunar and Planetary Laboratory 4 99 99 Bibcode 1966CoLPL 4 99J Houk N Smith Moore M 1988 Michigan Catalogue of Two dimensional Spectral Types for the HD Stars vol 4 Bibcode 1988mcts book H a b c 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 Gontcharov G A November 2006 Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system Astronomy Letters 32 11 759 771 arXiv 1606 08053 Bibcode 2006AstL 32 759G doi 10 1134 S1063773706110065 S2CID 119231169 a b c Anderson E Francis Ch 2012 XHIP An extended hipparcos compilation Astronomy Letters 38 5 331 arXiv 1108 4971 Bibcode 2012AstL 38 331A doi 10 1134 S1063773712050015 S2CID 119257644 a b c d David Trevor J Hillenbrand Lynne A 2015 The Ages of Early Type Stars Stromgren Photometric Methods Calibrated Validated Tested and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets The Astrophysical Journal 804 2 146 arXiv 1501 03154 Bibcode 2015ApJ 804 146D doi 10 1088 0004 637X 804 2 146 S2CID 33401607 Royer F et al February 2007 Rotational velocities of A type stars III Velocity distributions Astronomy and Astrophysics 463 2 671 682 arXiv astro ph 0610785 Bibcode 2007A amp A 463 671R doi 10 1051 0004 6361 20065224 S2CID 18475298 nu Cap SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2017 05 13 a href Template Cite web html title Template Cite web cite web a CS1 maint postscript link White Nathaniel M Feierman Barry H September 1987 A Catalog of Stellar Angular Diameters Measured by Lunar Occultation Astronomical Journal 94 751 Bibcode 1987AJ 94 751W doi 10 1086 114513 Zodiac Stars a b Naming Stars IAU org Retrieved 16 December 2017 Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR Hessman F V Dhillon V S Winget D E Schreiber M R Horne K Marsh T R Guenther E Schwope A Heber U 2010 On the naming convention used for multiple star systems and extrasolar planets arXiv 1012 0707 astro ph SR Allen R H 1963 Star Names Their Lore and Meaning Reprint ed New York Dover Publications Inc p 142 ISBN 0 486 21079 0 Retrieved 2010 12 12 IAU Working Group on Star Names WGSN Retrieved 22 May 2016 WG Triennial Report 2015 2018 Star Names PDF p 5 Retrieved 2018 07 14 Retrieved from https en wikipedia org w index php title Nu Capricorni amp oldid 1154755373, wikipedia, wiki, book, books, library,
