49 Cassiopeiae

{{short description|Binary star system in the constellation Cassiopeia}}

{{Starbox observe 2s

| epoch = J2000.0

| constell = Cassiopeia

| component1 = 49 Cas A

| ra1 = {{RA|02|05|31.55013}}

| dec1 = {{DEC|+76|06|54.2164}}

| appmag_v1 = 5.32

| component2 = 49 Cas B

| ra2 = {{RA|02|05|30.09074}}

| dec2 = {{DEC|+76|06|51.9730}}

| appmag_v2 = 12.30

}}

{{Starbox character

| component1 = 49 Cas A

| type = horizontal branch

| class = G8III

| b-v = {{Val|0.954|0.003}}

| u-b =

| variable =

}}

{{Starbox astrometry

| component1 = 49 Cas A

| radial_v = {{Val|−0.20|0.30}}

| prop_mo_ra = −11.813

| prop_mo_dec = −20.561

| parallax = 7.6673

| p_error = 0.0700

| parallax_footnote =

| absmag_v = −0.44

| component2 = 49 Cas B

| radial_v2 =

| prop_mo_ra2 = −13.572

| prop_mo_dec2 = −19.339

| parallax2 = 7.9161

| p_error2 = 0.0228

| parallax_footnote2 =

}}

{{Starbox detail

| component1 = 49 Cas A

| mass = 2.6

| radius = 16.6

| luminosity = 140

| temperature = 5,087

| gravity = 2.66

| metal_fe = −0.04

| rotational_velocity = 1.2

| age_myr = 647

| component2 = 49 Cas B

| mass2 = 0.81

| radius2 = 0.76

| luminosity2 = 0.28

| temperature2 = 4,886

| gravity2 = 4.59

| age_gyr2 = 1.6

}}

{{Starbox catalog

| names = {{odlist | F=49 Cas | BD=+75°86 | FK= | GC=2475 | HD=12339 | HIP=9763 | HR=592 | SAO=4565 | GSC=04495-01881 | CCDM=J02056+7607 }}

}}

{{Starbox reference

| Simbad = 49+Cas

}}

49 Cassiopeiae is a binary star system in the northern circumpolar constellation of Cassiopeia. It is visible to the naked eye as a faint, yellow-hued point of light with an apparent visual magnitude of 5.22. The system is located about 412 light years away from the Sun, based on parallax. The pair had an angular separation of {{Val|5.40|ul=arcsecond}} along a position angle of 244°, as of 2008, with the brighter component being of magnitude 5.32 and its faint companion having magnitude 12.30.

The primary, designated component A, is an aging giant star with a stellar classification of G8III. It is 302 million years old with 3.3 times the mass of the Sun. With the supply of hydrogen at its core exhausted, the star has now expanded to 17 times the Sun's radius. It is a red clump giant on the horizontal branch, which indicates it is generating energy through the fusion of helium at its core. The star is radiating 140 times the luminosity of the Sun from its swollen photosphere at an effective temperature of {{val|fmt=commas|5087|ul=K}}. Its faint secondary companion, component B, is of an unknown spectral type. It has a temperature similar to the primary, but a luminosity much lower than the Sun's.

References

{{Reflist|refs=

{{citation |postscript=. | bibcode=2005yCat.3244....0G | title=VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005) | journal=VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G | volume=3244 | last1=Glebocki | first1=R. | last2=Gnacinski | first2=P. | year=2005 }}

{{citation |postscript=. |bibcode=2020A&A...638A..76Q |title=From the bulge to the outer disc: StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |last1=Queiroz |first1=A. B. A. |last2=Anders |first2=F. |last3=Chiappini |first3=C. |last4=Khalatyan |first4=A. |last5=Santiago |first5=B. X. |last6=Steinmetz |first6=M. |last7=Valentini |first7=M. |last8=Miglio |first8=A. |last9=Bossini |first9=D. |last10=Barbuy |first10=B. |last11=Minchev |first11=I. |last12=Minniti |first12=D. |last13=García Hernández |first13=D. A. |last14=Schultheis |first14=M. |last15=Beaton |first15=R. L. |last16=Beers |first16=T. C. |last17=Bizyaev |first17=D. |last18=Brownstein |first18=J. R. |last19=Cunha |first19=K. |last20=Fernández-Trincado |first20=J. G. |last21=Frinchaboy |first21=P. M. |last22=Lane |first22=R. R. |last23=Majewski |first23=S. R. |last24=Nataf |first24=D. |last25=Nitschelm |first25=C. |last26=Pan |first26=K. |last27=Roman-Lopes |first27=A. |last28=Sobeck |first28=J. S. |last29=Stringfellow |first29=G. |last30=Zamora |first30=O. |journal=Astronomy and Astrophysics |year=2020 |volume=638 |pages=A76 |doi=10.1051/0004-6361/201937364 |arxiv=1912.09778 |s2cid=209439697 }}

{{citation |postscript=. |bibcode=2019ApJ...878...21T |title=The Vertical Motion History of Disk Stars throughout the Galaxy |last1=Ting |first1=Yuan-Sen |last2=Rix |first2=Hans-Walter |journal=The Astrophysical Journal |year=2019 |volume=878 |issue=1 |page=21 |doi=10.3847/1538-4357/ab1ea5 |arxiv=1808.03278 |s2cid=119211560 |doi-access=free }}

{{citation

| last1=Alves | first1=David R.

| title=K-Band Calibration of the Red Clump Luminosity

| journal=The Astrophysical Journal

| volume=539 | issue=2 | pages=732–741 | date=August 2000

| doi=10.1086/309278 | arxiv=astro-ph/0003329

| bibcode=2000ApJ...539..732A | s2cid=16673121

| postscript=. }}

{{citation | postscript=.

| last1=Abt | first1=Helmut A.

| title=Visual Multiples. IX. MK Spectral Types

| journal=The Astrophysical Journal Supplement Series

| volume=176 | issue=1 | pages=216–217 | year=2008

| bibcode=2008ApJS..176..216A | doi=10.1086/525529 | doi-access=free }}

{{citation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }}

{{citation

| display-authors=1 | last1=Takeda | first1=Yoichi

| last2=Sato | first2=Bun'ei | last3=Murata | first3=Daisuke

| title=Stellar Parameters and Elemental Abundances of Late-G Giants

| journal=Publications of the Astronomical Society of Japan

| date=August 2008 | volume=60 | issue=4 | pages=781–802

| bibcode=2008PASJ...60..781T | arxiv=0805.2434

| doi=10.1093/pasj/60.4.781 | s2cid=16258166 | postscript=. }}

{{citation

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | postscript=.

| bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}

{{citation

| display-authors=1 | last1=Mason | first1=B. D.

| last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I.

| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E.

| title=The Washington Visual Double Star Catalog

| journal=The Astronomical Journal

| year=2014 | volume=122 | issue=6 | pages=3466–3471

| bibcode=2001AJ....122.3466M | doi=10.1086/323920 | doi-access=free }}

{{citation |postscript=. | last1 = Anderson | first1 = E. | last2 = Francis | first2 = Ch. | title = XHIP: An extended hipparcos compilation | journal = Astronomy Letters | date = May 2012 | volume = 38 | issue = 5 | pages = 331–346 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 119257644 }}

}}

Category:G-type giants

Category:Horizontal-branch stars

Category:Double stars

Category:Cassiopeia (constellation)