Star in the constellation Perseus
ρ Persei Location of ρ Persei (circled)
Observation dataEpoch J2000 Equinox J2000 Constellation Perseus Right ascension 03h 05m 10.59385s [ 1] Declination +38° 50′ 24.9943″[ 1] Apparent magnitude (V)+3.39[ 2] Characteristics Evolutionary stage AGB [ 3] Spectral type M4 II[ 4] U−Bcolor index +1.79[ 2] B−Vcolor index +1.65[ 2] Variable type SRb [ 4] Astrometry Radial velocity (Rv )± 0.30[ 5] km/s Proper motion (μ)RA: +129.22[ 1] mas /yr Dec.: –105.70 [ 1] mas /yr Parallax (π)10.60± 0.25 mas [ 1] Distance 308 ± 7 ly pc ) Absolute magnitude (MV )−1.7[ 6] Details[ 7] Mass ± 0.7M ☉ Radius ± 12R ☉ Luminosity +192 L ☉ Surface gravity (log g )± 0.15cgs Temperature ± 125K Metallicity −0.15 dex Rotational velocity (v sin i )11.2[ 8] Age 440[ 9] Myr Other designations Gorgonea Tertia,Rho Per, ρ Per 25 Persei BD +38°630FK5 109GC 3682HD 19058HIP 14354HR 921SAO 56138PPM 68074[ 10] Database references SIMBAD data
Rho Persei ,Latinized fromρ Persei , is astar in the northernconstellation ofPerseus . It has the traditional nameGorgonea Tertia /ɡ ɔːr ɡ ə ˈ n iː ə ˈ t ɜːr ʃ ə [ 11] Gorgons from the legend ofPerseus .[ 9] apparent visual magnitude of +3.39[ 2] naked eye , but achallenge to view from a well-lit urban environment. Based uponparallax measurements, it is located at a distance of roughly 308 light-years (94 pc) fromEarth .[ 1]
Avisual band light curve for Rho Persei, plotted fromAAVSO data[ 12] Johann Schmidt discovered that Rho Persei is avariable star , in 1854.[ 13] [ 14] semiregular variable star , whoseapparent magnitude varies between 3.3 and 4.0[ 15] [ 6] asymptotic giant branch of itsevolution .[ 3] bright giant star with astellar classification of M4 II.[ 4] effective temperature of 3,479 K,[ 7] [ 16]
This star has a mass 1.9 times themass of the Sun , while its radius has expanded to 143times solar . It is radiating some 2,700 times theSun's luminosity .[ 7] × 10−8 solar masses per year, or the equivalent of the Sun's mass every 83 million years.[ 17] [ 9]
InChinese ,大陵 Dà Líng Mausoleum 9 Persei ,τ Persei ,ι Persei ,κ Persei ,β Persei ,16 Persei and12 Persei . Consequently, theChinese name for ρ Persei itself is大陵六 Dà Líng liù the Sixth Star of Mausoleum .).[ 18]
^a b c d e f van Leeuwen, F. (November 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 c d Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System",Astronomy and Astrophysics Supplement Series ,34 :1– 49,Bibcode :1978A&AS...34....1N ^a b Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun",Astronomical Journal ,104 (1):275– 313,Bibcode :1992AJ....104..275E ,doi :10.1086/116239 ^a b c Ragland, S.; et al. (November 2006), "First Surface-resolved Results with the Infrared Optical Telescope Array Imaging Interferometer: Detection of Asymmetries in Asymptotic Giant Branch Stars",The Astrophysical Journal ,652 (1):650– 660,arXiv :astro-ph/0607156 Bibcode :2006ApJ...652..650R ,doi :10.1086/507453 ,S2CID 30825403 ^ Famaey, B.; et al. (May 2009), "Spectroscopic binaries among Hipparcos M giants. I. Data, orbits, and intrinsic variations",Astronomy and Astrophysics ,498 (2):627– 640,arXiv :0901.0934 Bibcode :2009A&A...498..627F ,doi :10.1051/0004-6361/200810698 ,S2CID 18739721 ^a b Yeşilyaprak, C.; Aslan, Z. (December 2004), "Period-luminosity relation for M-type semiregular variables from Hipparcos parallaxes",Monthly Notices of the Royal Astronomical Society 355 (2):601– 607,Bibcode :2004MNRAS.355..601Y ,doi :10.1111/j.1365-2966.2004.08344.x ^a b c Kallinger, T.; et al. (April 2019), "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation",Astronomy & Astrophysics ,624 : 17,arXiv :1902.07531 Bibcode :2019A&A...624A..35K ,doi :10.1051/0004-6361/201834514 ,S2CID 102486794 , A35. ^ Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity",The Astronomical Journal ,135 (1):209– 231,Bibcode :2008AJ....135..209M ,doi :10.1088/0004-6256/135/1/209 ^a b c Kaler, James B.,"GORGONEA TERTIA (Rho Persei)" ,Stars , University of Illinois, retrieved2012-01-25 ^ "rho Per -- Semi-regular pulsating Star" ,SIMBAD , Centre de Données astronomiques de Strasbourg, retrieved2012-01-24 ^ Allen, Richard Hinckley (1899),"Star-names and their meanings" ,New York , G. E. Stechert: 334,Bibcode :1899sntm.book.....A ^ Enhanced LCG , retrieved21 September 2022 .^ Cannon, Annie J. (1907)."Second catalogue of variable stars" .Annals of Harvard College Observatory .55 :1– 94.Bibcode :1907AnHar..55....1C . Retrieved16 December 2024 . ^ "rho Per" .The International Variable Star Index . AAVSO. Retrieved16 December 2024 .^ Kukarkin, B. V.; et al. (1971),General Catalogue of Variable Stars (3rd ed.),Bibcode :1971GCVS3.C......0K ^ "The Colour of Stars" ,Australia Telescope, Outreach and Education , Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived fromthe original on 2013-12-03, retrieved2012-01-16 ^ Cox, Arthur N.; Becker, Stephen A.; Pesnell, W. Dean (2000),"Chapter 20. Theoretical Stellar Evolution" (PDF) ,Allen's astrophysical quantities (4th ed.), New York: Springer, p. 516,ISBN 0-387-98746-0 the original (PDF) on 2016-03-04, retrieved2012-01-25 ^ (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 theWayback Machine
