42 Capricorni

42 Capricorni
	estrella, Estrella binaria espectroscópica, Estrella variable, Estrella variable RS Canum Venaticorum (es) , fonte d'infrarroxos, fuente astrofísica de rayos X (es) , near-IR source (en) y UV-emission source (en)
Datos d'observación
Ascensión reuta (α)	325,38691169327 °
Declinación (δ)	−14,047612442259 °
Distancia a la Tierra	35,8905 pc
Magnitú aparente (V)	5,18 (banda V)
Constelación	Capricorniu
Velocidá de rotación	8,1 km/s
Velocidá radial	−11,63 km/s
Parallax	27,8625 mas
Carauterístiques físiques
Radiu	2,6 Radius solars
Masa	1,09 M☉
Gravedá superficial	3980 cm/s²
Tipu espectral	G1 IV
Otros nomes
	Ver llista GSC 05799-01135 (Guide Star Catalog (es) ); HD 206301 (Catálogu Henry Draper); HIP 107095 (Catálogu Hipparcos); HR 8283 (Bright Star Catalogue); IRAS 21388-1416 (IRAS (es) ); 2MASS J21413286-1402511 (2MASS (es) ); SAO 164580 (Catálogu SAO); 1RXS J214133.2-140247 (1RXS (en) ); 2EUVE J2141-14.0 (The second Extreme Ultraviolet Explorer source catalog (en) ); EUVE J2141-14.0 (The first Extreme Ultraviolet Explorer source catalog (en) ); GC 30354 (Boss General Catalogue (es) ); GCRV 13620 (General Catalogue of Stellar Radial Velocities (es) ); HIC 107095 (Hipparcos Input Catalogue (en) ); LTT 8644 (Luyten Two-Tenths catalogue (en) ); NLTT 51834 (New Luyten Two-Tenths catalogue (en) ); PLX 5229 (General Catalogue of Trigonometric Stellar Parallaxes (es) ); PLX 5229.00 (General Catalogue of Trigonometric Stellar Parallaxes (es) ); PMC 90-93 6285 (Tokyo Photoelectric Meridian Circle Catalog (en) ); PPM 239206 (Catálogo de estrellas PPM (es) ); RBS 1772 (ROSAT All-Sky Survey Bright Source Catalogue (en) ); ROT 3152 (Catalogue of rotational velocities of the stars (en) ); TD1 28359 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ); TYC 5799-1135-1 (Tycho Catalogue (en) ); UBV 18620 (UBV Photoelectric Photometry Catalogue (en) ); BY Cap (General Catalogue of Variable Stars); YZ 104 8152 (Yale Observatory Zone Catalog (en) ); uvby98 100206301 (uvbyβ Photoelectric Photometric Catalogue (en) ); SBC9 1322 (Eighth catalogue of the orbital elements of spectroscopic binary systems (en) ); SBC7 868 (Seventh catalogue of the orbital elements of spectroscopic binary systems (en) ); [TVS94] 51 (The Spacelab-1 Very Wide Field Survey of UV-excess objects. IV. The performance of the instrument in combination with optical photometry as a means of identifying stars with peculiar properties (en) ); WEB 19345 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ); Gaia DR2 6841803123511245696 (Gaia DR2 (es) ); 42 Cap (Denominación de Flamsteed (es) ); Gaia DR3 6841803123511245696 (Gaia DR3 (es) ); RAVE J214132.9-140251 (RAdial Velocity Experiment (en) ); TIC 155706950 (TESS Input Catalog (en) );

Coordenaes: 21^h 41^m 32.859^s, -14^° 2^′ 51.405^″

42 Capricorni (42 Cap / HD 206301 / HR 8283)^[8] ye una estrella binaria na constelación de Capricorniu de magnitú aparente +5,18.^[9] La so duplicidá afayóse por Lunt en 1918.^[10]

La componente principal del sistema ye una subxigante mariella de tipu espectral G1IV con una temperatura averada de 5637 K.^[11] Tien una lluminosidá 6,6 vegaes mayor que la del Sol y el so radiu ye 2,6 vegaes más grande que'l radiu solar. Ye una estrella evolucionada qu'abandonó la secuencia principal; cuando nació, hai aproximao 3700 millones d'años, yera una estrella más caliente de tipu F4V. La componente secundaria ye una nana mariella de tipu G2V bien similar al Sol que relluma con una lluminosidá apenes un 10% mayor que la lluminosidá solar.^[12] La so masa ye un 4% inferior a la masa solar, mientres la so compañera tien una masa un 42% mayor qu'ella, polo qu'evolucionó enantes.^[13] El periodu orbital d'esta binaria ye de 13,174 díes. La escentricidá de la órbita ye ε = 0,176.^[12]

El sistema tien una metalicidá llixeramente inferior a la solar ([Fe/H] = -0,05).^[11] Amuesa actividá cromosférica y ta catalogáu como variable RS Canum Venaticorum. La variación de rellumu ye de 0,05 magnitúes y recibe el nome —tocantes a estrella variable— de BY Capricorni.^[14] Alcuéntrase a 106 años lluz de distancia del Sistema Solar.

Referencies[editar | editar la fonte]

↑ ^1,0 ^1,1 ^1,2 ^1,3 ^1,4 ^1,5 ^1,6 ^1,7 Afirmao en: SIMBAD.
↑ ^2,0 ^2,1 ^2,2 ^2,3 Afirmao en: Gaia EDR3. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 3 avientu 2020.
↑ Afirmao en: Catalogue of Stellar Photometry in Johnson's 11-color system. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 2002.
↑ «Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants». The Astronomical Journal (1). 21 avientu 2016. doi:10.3847/1538-3881/153/1/21.
↑ Afirmao en: Gaia DR2. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 25 abril 2018.
↑ Joss Bland-Hawthorn (2020). «The Sixth Data Release of the Radial Velocity Experiment (RAVE). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances». The Astronomical Journal (2). doi:10.3847/1538-3881/AB9AB8.
↑ Christopher J. Corbally (2 xunu 2006). «Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample» (n'inglés). The Astronomical Journal (1): páxs. 161–170. doi:10.1086/504637.
↑ 37 V* BY Cap -- Variable of RS CVn type (SIMBAD)
↑ 42 Capricorni (The Bright Star Catalogue)
↑ Lunt, J. (1918). «On the orbit of the spectroscopic binary 42 Capricorni». The Astrophysical Journal 47. pp. 134-136. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1918ApJ....47..134L&db_key=AST&nosetcookie=1.
↑ ^11,0 ^11,1 Holmberg, J.; Nordström, B.; Andersen, J. (2009). «The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics». Astronomy and Astrophysics 501 (3). pp. 941-947 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A%26A...501..941H&db_key=AST&nosetcookie=1.
↑ ^12,0 ^12,1 Fekel, Francis C. (1997). «Chromospherically Active Stars. XVI. The Double-Lined Binary 42 Capricorni». Astronomical Journal 114. p. 2747. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1997AJ....114.2747F&db_key=AST&nosetcookie=1.
↑ Tokovinin, A.; Thomas, S.; Sterzik, M.; Udry, S. (2006). «Tertiary companions to close spectroscopic binaries». Astronomy and Astrophysics 450 (2). pp. 681-693. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2006A%26A...450..681T&db_key=AST&nosetcookie=1.
↑ BY Cap (General Catalogue of Variable Stars)

Coordenaes: 21^h 41^m 32.859^s, -14^° 2^′ 51.405^″

[8ba559d5760a03bedaaacc3c347bbfe4981560bf-1] 1,0 ^1,1 ^1,2 ^1,3 ^1,4 ^1,5 ^1,6 ^1,7 Afirmao en: SIMBAD.

[88f46fab9cce60c7e274ff942763157775017282-2] 2,0 ^2,1 ^2,2 ^2,3 Afirmao en: Gaia EDR3. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 3 avientu 2020.

[a1b1b6b07c06876959d87fc2f8c07203d5b512f3-3] Afirmao en: Catalogue of Stellar Photometry in Johnson's 11-color system. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 2002.

[bd2a71104e373ac322e3d44720f2532f6e28db17-4] «Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants». The Astronomical Journal (1). 21 avientu 2016. doi:10.3847/1538-3881/153/1/21.

[930587e73b5b66c983eb1a1b6178ebadc15ac870-5] Afirmao en: Gaia DR2. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 25 abril 2018.

[98b03bba0444bcc394982b7a17276d7d0f77125b-6] Joss Bland-Hawthorn (2020). «The Sixth Data Release of the Radial Velocity Experiment (RAVE). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances». The Astronomical Journal (2). doi:10.3847/1538-3881/AB9AB8.

[d6fe75b9808b91f527fa105319c1bcafee3e4664-7] Christopher J. Corbally (2 xunu 2006). «Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample» (n'inglés). The Astronomical Journal (1): páxs. 161–170. doi:10.1086/504637.

[SIMBAD-8] 37 V* BY Cap -- Variable of RS CVn type (SIMBAD)

[BSC-9] 42 Capricorni (The Bright Star Catalogue)

[Lunt-10] Lunt, J. (1918). «On the orbit of the spectroscopic binary 42 Capricorni». The Astrophysical Journal 47. pp. 134-136. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1918ApJ....47..134L&db_key=AST&nosetcookie=1.

[Geneva2009-11] 11,0 ^11,1 Holmberg, J.; Nordström, B.; Andersen, J. (2009). «The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics». Astronomy and Astrophysics 501 (3). pp. 941-947 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A%26A...501..941H&db_key=AST&nosetcookie=1.

[Fekel-12] 12,0 ^12,1 Fekel, Francis C. (1997). «Chromospherically Active Stars. XVI. The Double-Lined Binary 42 Capricorni». Astronomical Journal 114. p. 2747. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1997AJ....114.2747F&db_key=AST&nosetcookie=1.

[Tokovinin-13] Tokovinin, A.; Thomas, S.; Sterzik, M.; Udry, S. (2006). «Tertiary companions to close spectroscopic binaries». Astronomy and Astrophysics 450 (2). pp. 681-693. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2006A%26A...450..681T&db_key=AST&nosetcookie=1.

[14] BY Cap (General Catalogue of Variable Stars)

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