What is T Persei?
{{Starbox begin | name = T Persei }} {{Starbox observe | epoch=J2000 | ra={{RA|2|19|21.87884}}<ref name=hipparcos>{{cite journal|bibcode=2007A&A...474..653V|title=Validation of the new Hipparcos reduction|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|last1=Van Leeuwen|first1=F.|year=2007|doi=10.1051/0004-6361:20078357|arxiv = 0708.1752 |s2cid=18759600}}</ref> | dec= {{DEC|+58|57|40.3271}}<ref name=hipparcos/> | appmag_v=8.34-9.70<ref name=gcvs/> | constell=[[Perseus (constellation)|Perseus]] }} {{Starbox character | class=M2Iab<ref name=kiss>{{cite journal|bibcode=2006MNRAS.372.1721K|arxiv=astro-ph/0608438|title=Variability in red supergiant stars: Pulsations, long secondary periods and convection noise|journal=Monthly Notices of the Royal Astronomical Society|volume=372|issue=4|pages=1721–1734|last1=Kiss|first1=L. L.|last2=Szabó|first2=Gy. M.|last3=Bedding|first3=T. R.|author3-link= Tim Bedding|year=2006|doi=10.1111/j.1365-2966.2006.10973.x|s2cid=5203133}}</ref> | b-v=+2.33<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|last1=Ducati|first1=J. R.|year=2002}}</ref> | u-b=+2.62<ref name=ducati/> | variable=[[Semiregular variable|SRc]]<ref name=gcvs>{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|display-authors=|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref> }} {{Starbox astrometry | radial_v=&minus;40.85<ref>{{cite journal|bibcode=2005A&A...430..165F|title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters|journal=Astronomy and Astrophysics|volume=430|pages=165|last1=Famaey|first1=B.|last2=Jorissen|first2=A.|last3=Luri|first3=X.|last4=Mayor|first4=M.|last5