|
| 연주시차 = 2.42 ± 1.02 밀리초각
| 거리 = 약 1,300광년(400파섹)
| 광도 = 5,200<ref name=lombaert>{{cite저널 journal인용|bibcode=2016A&A...588A.124L|arxiv=1601.07017|title=Constraints on the H2O formation mechanism in the wind of carbon-rich AGB stars|journal=Astronomy & Astrophysics|volume=588|pages=A124|author1=Lombaert|first1=R.|last2=Decin|first2=L.|last3=Royer|first3=P.|last4=De Koter|first4=A.|last5=Cox|first5=N. L. J.|last6=González-Alfonso|first6=E.|last7=Neufeld|first7=D.|last8=De Ridder|first8=J.|last9=Agúndez|first9=M.|last10=Blommaert|first10=J. A. D. L.|last11=Khouri|first11=T.|last12=Groenewegen|first12=M. A. T.|last13=Kerschbaum|first13=F.|last14=Cernicharo|first14=J.|last15=Vandenbussche|first15=B.|last16=Waelkens|first16=C.|year=2016|doi=10.1051/0004-6361/201527049}}</ref>{{태양광도|link=on}}
| BV = +5.74<ref name=bsc2>[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=1607 HR 1607], database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., [[Centre de Données astronomiques de Strasbourg|CDS]] ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50]. Accessed on line November 19, 2009.</ref>
| RI = +1.47<ref name=bsc2 />
| 변광성분류 = [[미라형 변광성]]<ref name=gcvs1>R Lep, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars], Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 19, 2009.</ref>
| 겉보기 등급 = +5.5 - +11.7
| 반지름 = 400 ± 90<ref name=hofmann>{{cite저널 journal인용|bibcode=2005ESASP.560..651H|title=Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared|journal=Proceedings of the 13th Cambridge Workshop on Cool Stars|volume=560|pages=651|author1=Hofmann|first1=K.-H.|last2=Eberhardt|first2=M.|last3=Driebe|first3=T.|last4=Schertl|first4=D.|last5=Scholz|first5=M.|last6=Schoeller|first6=M.|last7=Weigelt|first7=G.|last8=Wittkowski|first8=M.|last9=Woodruff|first9=H. C.|year=2005}}</ref>{{태양반경|link=on}}
| 표면온도 = 2,290<ref name=lombaert />
}}
===거리===
지구에서 토끼자리 R까지의 거리는 약 1350[[광년]]이다.<ref name=Mcdonald>{{cite저널 journal인용|author=McDonald, I.|author2=Zijlstra, A. A.|author3=Boyer, M. L.|date=2012|title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars|journal=Monthly Notices of the Royal Astronomical Society|volume=427|issue=1|pages=343–57|bibcode=2012MNRAS.427..343M|doi=10.1111/j.1365-2966.2012.21873.x|arxiv = 1208.2037 }}</ref>
===온도===
| 