| 词条 | Sigma Cassiopeiae |
| 释义 |
| name = σ Cassiopeiae }}{{Starbox image | image= | caption=σ Cassiopeiae in optical light }}{{Starbox observe | epoch = J2000.0 | constell = Cassiopeia | ra = {{RA|23|59|00.538}}[1] | dec = {{DEC|+55|45|17.74}}[1] | appmag_v = +4.88[3] (5.01 + 7.24[4]) }}{{Starbox character | class = B2 IV + B3 V[5] | b-v = −0.07 | u-b = −0.82 | variable = β Cep?[6] }}{{Starbox astrometry | radial_v = −12.6[7] | prop_mo_ra = 8.14 ± 0.34[1] | prop_mo_dec = −5.01 ± 0.32[1] | parallax = 0.72 | p_error = 0.43 | parallax_footnote = [1] | absmag_v = −3.90[6] + −1.7[5] }}{{Starbox detail | source = [6] | component1 = A | mass = 12 | temperature = 21,000 | radius = 11.3 | luminosity = 25,000 | gravity = 3.6 | rotational_velocity = 170 | age_myr = 15.8 }}{{Starbox catalog | names = 8 Cassiopeiae, HR 9071, HD 224572, BD+54°3082, HIP 118243, SAO 35947, ADS 17140, CCDM J23591+5546 }}{{Starbox reference | Simbad = Sigma+Cassiopeiae }}{{Starbox end}} Sigma Cassiopeiae (σ Cas, σ Cassiopeiae) is a binary star in the constellation Cassiopeia. It is approximately 5000 light years from Earth[1] and has a combined apparent magnitude of +4.88. The primary component, σ Cassiopeiae A, is a B2 subgiant with an apparent magnitude of +5.0. Its companion, σ Cassiopeiae B, is a B5 main sequence dwarf with an apparent magnitude of +7.1. The two stars are three arcseconds apart. NamingIn Chinese, {{lang|zh|螣蛇}} ({{lang|zh-Latn|Téng Shé}}), meaning Flying Serpent, refers to an asterism consisting of σ Cassiopeiae, α Lacertae, 4 Lacertae, π2 Cygni, π1 Cygni, HD 206267, ε Cephei, β Lacertae, ρ Cassiopeiae, τ Cassiopeiae, AR Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae, ι Andromedae, and ψ Andromedae. Consequently, σ Cassiopeiae itself is known as {{lang|zh|螣蛇十一}} ({{lang|zh-Latn|Téng Shé shíyī}}, {{lang-en|the Eleventh Star of Flying Serpent}}).[16] References1. ^1 {{cite journal|bibcode= 2006AstL...32..759G |title= Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system |journal= Astronomy Letters |volume= 32 |issue= 11 |pages= 759 |author1= Gontcharov |first1= G. A. |year= 2006 |doi= 10.1134/S1063773706110065 |arxiv = 1606.08053 }} [1][2][3][4][5][6][7]2. ^1 2 3 4 5 6 {{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }}Vizier catalog entry 3. ^1 {{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 7 日 4. ^1 2 {{cite journal|bibcode=1983ApJ...272..182A|title=Confirmation among visual multiples of an increase of AP stars with age|journal=Astrophysical Journal|volume=272|pages=182|author1=Abt|first1=H. A.|last2=Cardona|first2=O.|year=1983|doi=10.1086/161276}} 5. ^1 2 3 {{cite journal|doi=10.1016/j.newast.2009.05.001|title=Spectroscopic analysis of the candidate β Cephei star σ Cas: Atmospheric characterization and line-profile variability|journal=New Astronomy|volume=15|pages=39|year=2010|last1=Catanzaro|first1=G.|last2=Ventura|first2=R.|last3=Ferrara|first3=F.|last4=Paternò|first4=L.|bibcode = 2010NewA...15...39C }} 6. ^1 {{cite journal|bibcode=2000A&A...355L..27H|title=The Tycho-2 catalogue of the 2.5 million brightest stars|journal=Astronomy and Astrophysics|volume=355|pages=L27|author1=Høg|first1=E.|last2=Fabricius|first2=C.|last3=Makarov|first3=V. V.|last4=Urban|first4=S.|last5=Corbin|first5=T.|last6=Wycoff|first6=G.|last7=Bastian|first7=U.|last8=Schwekendiek|first8=P.|last9=Wicenec|first9=A.|year=2000}} 7. ^1 {{cite journal|bibcode=1978A&AS...34....1N|title=Catalogue of homogeneous data in the UBV photoelectric photometric system|journal=Astronomy and Astrophysics|volume=34|pages=1|author1=Nicolet|first1=B.|year=1978}} }}{{Stars of Cassiopeia}} 12 : Bayer objects|Flamsteed objects|Binary stars|B-type giants|B-type main-sequence stars|Cassiopeia (constellation)|HR objects|Henry Draper Catalogue objects|Hipparcos objects|Durchmusterung objects|Beta Cephei variables|Suspected variables |
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