Star in the constellation Perseus
Mu Persei
Location of μ Persei (circled)
Observation dataEpoch J2000 Equinox J2000
Constellation
Perseus
Right ascension 04h 14m 53.86253s [ 1]
Declination
+48° 24′ 33.5912″[ 1]
Apparent magnitude (V)+4.16[ 2]
Characteristics
Spectral type
G0Ib[ 3] [ 4]
B−V color index
± 0.002[ 5]
Astrometry Radial velocity (Rv )26.46[ 6] km/s Proper motion (μ) RA: 5.52[ 1] mas /yr Dec.: −17.37[ 1] mas /yr Parallax (π)3.62± 0.20 mas [ 1] Distance 900 ± 50 ly pc ) Absolute magnitude (MV )−3.08[ 5] Orbit [ 7] Period (P)284 d Semi-major axis (a)18.8 ± 8.8 mas Eccentricity (e)0.062 Inclination (i)74 ± 24° Longitude of the node (Ω)296 ± 18° Periastron epoch (T)2,420,062 Argument of periastron (ω)302° Details Radius ~53[ 8] R ☉ Luminosity ~2030[ 8] L ☉ Surface gravity (log g )1.74[ 9] cgs Temperature 5418[ 9] K Metallicity [Fe/H] 0.09[ 9] dex Rotational velocity (v sin i )12[ 10] Other designations Mu Per, μ Per , 51 Persei , NSV 1518BD +48 1063FK5 1117GC 5099HD 26630HIP 19812HR 1303SAO 39404PPM 46912CCDM J04149+4824AWDS J04149+4825A[ 11] Database references SIMBAD data
Mu Persei , Latinised from μ Persei , is a binary star system in the northern constellation of Perseus . It is visible to the naked eye as a point of light with a combined apparent visual magnitude of +4.16.[ 2] light-years based on parallax measurements.[ 1] radial velocity of +26 km/s.[ 6]
Mu Persei is a spectroscopic binary with an orbital period of 284 days and an eccentricity of about 0.06.[ 7] G-type supergiant star. With an effective temperature of about K solar radii , this star has the luminosity of about 2,030 times that of the Sun .[ 8] B-type star with a class of B9.5[ 4]
Mu Persei is moving through the galaxy at a speed of 35.6 km/s relative to the Sun. Its projected galactic orbit carries it between 23,900 and 32,400 light-years from the center of the galaxy.[ 12]
Mu Persei came closest to the Sun 5.6 million years ago when it had brightened to magnitude 3.25 from a distance of 600 light-years.[ 12]
In Chinese , 天船 Tiān Chuán Celestial Boat asterism consisting of μ Persei, η Persei , γ Persei , α Persei , ψ Persei , δ Persei , 48 Persei and HD 27084 . Consequently, μ Persei itself is known as 天船七 Tiān Chuán qī the Seventh Star of Celestial Boat ).[ 13]
^ a b c d e f van Leeuwen, F.; et al. (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 . ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues . 2237 . Bibcode :2002yCat.2237....0D . ^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series . 71 : 245. Bibcode :1989ApJS...71..245K . doi :10.1086/191373 . S2CID 123149047 . ^ a b Pantaleoni González, M.; Maíz Apellániz, J.; Barbá, R. H.; Negueruela, I. (January 2020). "A Catalog of Galactic Multiple Systems with a Red Supergiant and a B Star" . Research Notes of the AAS . 4 (1): 12. arXiv :2001.11680 Bibcode :2020RNAAS...4...12P . doi :10.3847/2515-5172/ab712b S2CID 211003674 . 12. ^ a b 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 Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics . 480 (1): 91– 101. arXiv :0712.1370 Bibcode :2008A&A...480...91S . doi :10.1051/0004-6361:20078788 . S2CID 16602121 . ^ a b Alden, Harold L. (1925). "Apparent orbit of μ Persei" . Astronomical Journal . 36 (851): 81– 82. Bibcode :1925AJ.....36...81A . doi :10.1086/104676 ^ a b c MU PER (Mu Persei) ^ a b c Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars" . The Astronomical Journal . 147 (6): 137. Bibcode :2014AJ....147..137L . doi :10.1088/0004-6256/147/6/137 ^ de Medeiros, J. R.; Udry, S.; Burki, G.; Mayor, M. (2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars" (PDF) . Astronomy and Astrophysics . 395 : 97– 98. Bibcode :2002A&A...395...97D . doi :10.1051/0004-6361:20021214 ^ "* mu. Per" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 23 February 2017 .^ a b Mu Persei (HIP 19812) Archived 2013-04-14 at archive.today ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日 Archived 2012-02-04 at the Wayback Machine
