| 词条 | R Capricorni |
| 释义 |
| name = R Capricorni}}{{Starbox observe | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Capricornus | ra = {{RA|20|11|18.39}}[1] | dec = {{DEC|−14|16|04.4}}[1] | appmag_v=9.4 to 14.9[2] }}{{Starbox character | class = Cev[1] | variable = M[2] }}{{Starbox astrometry | prop_mo_ra = 4[1] | prop_mo_dec = −6[1] }}{{Starbox catalog | names=R Cap, BD−14 5663, GC 28001, SAO 163323.[1]}}{{Starbox reference | Simbad=r+cap}}{{Starbox end}}R Capricorni (R Cap) is a star in the constellation of Capricornus.[1] It has an apparent visual magnitude which varies between 9.4 and 14.9.[2] A mira variable and ageing red giant, it is in the asymptotic giant branch stage of its lifespan.[11] R Capricorni is too far from earth for its parallax to be measured effectively; Guandalini and Cristallo calculated the luminosity of Mira variables based on their periods. Using a period of 345.13 days, they calculated the absolute magnitude of R Capricorni to be -4.58.[3] References1. ^1 2 3 4 5 6 {{SIMBAD link|r+cap|V* R Cap -- Variable Star of Mira Cet type}}, database entry, SIMBAD. Accessed on line November 9, 2009. {{Stars of Capricornus}}{{var-star-stub}}2. ^1 2 R Cap, database entry, 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 9, 2009. 3. ^1 {{cite journal | bibcode=2013A&A...555A.120G |title=Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way |author = Guandalini, R. |author2 = Cristallo, S. |journal = Astronomy & Astrophysics |volume = 555 | id = A120 | pages = 7 |date=2013|arxiv = 1305.4203 |doi = 10.1051/0004-6361/201321225 }} 8 : Capricornus (constellation)|Mira variables|C-type stars|Objects with variable star designations|IRAS catalogue objects|2MASS objects|Durchmusterung objects|Emission-line stars |
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