BR Piscium

BR Piscium
	estrella
Descubridor	Joseph Lalande (es)
Data de descubrimientu	1801
Datos d'observación
Ascensión reuta (α)	357,3021880797 °
Declinación (δ)	2,4012230680252 °
Distancia a la Tierra	19,1 ly ; 5,9046 pc
Magnitú aparente (V)	8,993 (banda V)
Magnitú absoluta	10,22
Constelación	Piscis
Velocidá de rotación	2,25 km/s
Velocidá radial	−71,79 km/s
Parallax	169,3585 mas
Carauterístiques físiques
Diámetru	693 000 km
Masa	0,51 M🜨
Gravedá superficial	69 000 cm/s²
Tipu espectral	M2
Otros nomes
	Ver llista BD +01 4774 ; HIC 117473 ; HIP 117473 ; IRAS 23466+0207 ; LHS 550 ; NLTT 58069 ; NSV 14719 ; PPM 174453 ; 1RXS J234911.9+022422 ; SAO 128397 ; 2MASS J23491255+0224037 ; AG +02 2968 ; ASCC 1180532 ; Ci 18 3124 ; G 29-68 ; GC 33053 ; GCRV 14913 ; GJ 908 ; GSC 00586-00610 ; JP11 12 ; LFT 1828 ; LSPM J2349+0224 ; LTT 17014 ; 8pc 167.51 ; PLX 5763 ; RX J2349.1+0224 ; UBV 20450 ; UCAC2 32640241 ; USNO -B1.0 0924-00778184 ; YZ 2 8164 ; Zkh 355 Лаланд 46650 ; BR Piscium ; ASCC 1180532 (All-sky Compiled Catalogue (en) ); GCRV 14913 (General Catalogue of Stellar Radial Velocities (es) ); GJ 908 (Catálogu Gliese); GSC 00586-00610 (Guide Star Catalog (es) ); HIC 117473 (Hipparcos Input Catalogue (en) ); HIP 117473 (Catálogu Hipparcos); IRAS 23466+0207 (IRAS (es) ); JP11 12 (JP11 (en) ); LFT 1828 (Luyten Five-Tenths catalogue (en) ); LHS 550 (Luyten Half-Second catalogue (en) ); LSPM J2349+0224 (LSPM-NORTH catalog (en) ); LTT 17014 (Luyten Two-Tenths catalogue (en) ); 2MASS J23491255+0224037 (2MASS (es) ); NLTT 58069 (New Luyten Two-Tenths catalogue (en) ); NSV 14719 (New Catalogue of Suspected Variable Stars (es) ); PLX 5763 (General Catalogue of Trigonometric Stellar Parallaxes (es) ); PLX 5763.00 (General Catalogue of Trigonometric Stellar Parallaxes (es) ); PPM 174453 (Catálogo de estrellas PPM (es) ); 1RXS J234911.9+022422 (1RXS (en) ); SAO 128397 (Catálogu SAO); UBV 20450 (UBV Photoelectric Photometry Catalogue (en) ); UBV M 172 (Photoelectric catalogue, magnitudes and colors of stars in the UBV and UCBV systems (en) ); UBV 20455 (UBV Photoelectric Photometry Catalogue (en) ); UBV 20422 (UBV Photoelectric Photometry Catalogue (en) ); UCAC2 32640241 (Second USNO CCD Astrograph Catalog (en) ); UCAC4 463-135261 (Fourth USNO CCD Astrograph Catalog (en) ); YZ 2 8164 (Yale Observatory Zone Catalog (en) ); Zkh 355 (Catálogo Zakhozhaj (es) ); Karmn J23492+024 (CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS (en) ); AG+02 2968 (AGK3U (en) ); BD+01 4774 (Bonner Durchmusterung); Ci 18 3124 (Catalogue of proper motion stars (en) ); Ci 20 1454 (Catalogue of proper motion stars (en) ); LAL 46650 (A catalogue of those stars in the "Histoire Celeste Francaise" of J. De Lalande for which tables of reduction to the epoch 1800 have been published by Professor Schumacher (en) ); YZC 20 8164 (Catalogue of the positions and proper motions of "nnn" stars. Zone between declination +20 and + 25 (en) ); [GKL99] 460 (Catalogue and bibliography of the UV Cet-type flare stars and related objects in the solar vicinity (en) ); RX J2349.1+0224 (X-ray survey of the Large Magellanic Cloud by ROSAT (en) ); TYC 586-610-1 (Catálogo Tycho-2 (es) ); [ZEH2003] RX J2349.1+0224 2 (The Hamburg/RASS Catalogue of optical identifications. Northern high-galactic latitude ROSAT Bright Source Catalogue X-ray sources (en) ); PM J23492+0224 (Catalogs of proper-motion stars. I. Stars brighter than visual magnitude 15 and with annual proper motion of 1" or more (en) ); Gaia DR1 2739689235015218560 (Gaia DR1 (es) ); WEB 20691 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ); Gaia DR2 2739689239311660672 (Gaia DR2 (es) ); BR Psc (General Catalogue of Variable Stars);

Coordenaes: 23^h 49^m 12.525^s, 2^° 24^′ 4.403^″

BR Piscium (BR Psc / GJ 908 / HIP 117473)^[8] ye una estrella na constelación de Piscis. Asitiada a 19,35 años lluz de distancia, ye una de les 100 estrelles más cercanes al Sistema Solar.^[9]

BR Piscium ye una nana colorada de magnitú aparente +8,98,^[8] demasiao tenue pa ser reparada a simple vista. De tipu espectral M1.0V, tien una temperatura efectivo de 3620 K.^[10] La so masa ye aproximao la metá de la del Sol^[9] y relluma con una lluminosidá bolométrica —qu'inclúi'l total de la radiación electromagnético emitida, fundamentalmente como radiación infrarroxo— igual al 2,4% de la lluminosidá solar. El so diámetru ye la metá del que tien el Sol y xira sobre sigo mesma con una velocidá de rotación proyeutada de 2,25 km/s. El so periodu de rotación ye igual o inferior a 11,2 díes.^[11]

La metalicidá de BR Piscium, espresada como la rellación ente los conteníos de fierro y hidróxenu, equival a un 30% de la solar.^[12] Apaez catalogada como estrella acandilante na base de datos SIMBAD y como variable BY Draconis nel General Catalogue of Variable Stars (GCVS).^[13]

Les estrelles más cercanes a BR Piscium son GJ 1286 y GJ 1002, tamién nanes coloraes, a 4,7 y 5,3 años lluz respeutivamente.^[14]

Referencies

1 2 Afirmao en: SIMBAD.
1 2 3 4 Afirmao en: Gaia DR2. Llingua de la obra o nome: inglés. Data d'espublización: 25 abril 2018.
↑ URL de la referencia: http://wwwadd.zah.uni-heidelberg.de/datenbanken/aricns/cnspages/4c01940.htm.
↑ Afirmao en: VizieR. Llingua de la obra o nome: inglés.
1 2 «Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars★» (n'inglés). Monthly Notices of the Royal Astronomical Society (3): páxs. 1657–1673. 25 agostu 2010. doi:10.1111/J.1365-2966.2010.16827.X.
↑ URL de la referencia: http://www.recons.org/TOP100.posted.htm. Direición web d'archivu: https://www.webcitation.org/69Ys1TXkI?url=http://www.recons.org/TOP100.posted.htm. Data d'archivu: 31 xunetu 2012.
↑ Pablo Mauas (setiembre 2014). «Trumpeting M dwarfs with CONCH-SHELL: a catalogue of nearby cool host-stars for habitable exoplanets and life» (n'inglés). Monthly Notices of the Royal Astronomical Society (3): páxs. 2561-2578. doi:10.1093/MNRAS/STU1313.
1 2 BR Piscium -Flare star (SIMBAD)
1 2 The One Hundred Nearest Star Systems (RECONS)
↑ Morales, J. C.; Ribas, I.; Jordi, C. (2008). «The effect of activity on stellar temperatures and radii». Astronomy and Astrophysics 478 (2). páxs. 507-512 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...478..507M&db_key=AST&nosetcookie=1.
↑ Houdebine, Y. R. (2010). «Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars». Monthly Notices of the Royal Astronomical Society 407 (3). páxs. 1657-1673. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010MNRAS.407.1657H&db_key=AST&nosetcookie=1.
↑ Bonfils, X.; Delfosse, X.; Udry, S.; Santos, N. C.; Forveille, T.; Ségransan, D. (2005). «Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence». Astronomy and Astrophysics 442 (2). páxs. 635-642. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2005A%26A...442..635B&db_key=AST&nosetcookie=1.
↑ BR Piscium (General Catalogue of Variable Stars)
↑ Stars within 15 light-years of Bonner Durchmusterung +1°4774 (The Internet Stellar Database)

Coordenaes: 23^h 49^m 12.525^s, 2^° 24^′ 4.403^″

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[8ba559d5760a03bedaaacc3c347bbfe4981560bf-1] 1 2 Afirmao en: SIMBAD.

[b64af6c056b6c5f6a7ea17156dcd718d4744bbf8-2] 1 2 3 4 Afirmao en: Gaia DR2. Llingua de la obra o nome: inglés. Data d'espublización: 25 abril 2018.

[9f4c6fb7bccf94a9d637d6fbcf3ae2cb2ed5822d-3] URL de la referencia: http://wwwadd.zah.uni-heidelberg.de/datenbanken/aricns/cnspages/4c01940.htm.

[eedd662cbc889e46d17821464d4af8748a120b6c-4] Afirmao en: VizieR. Llingua de la obra o nome: inglés.

[a496ea658ce860c5200843c54a3a7137dad5c945-5] 1 2 «Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars★» (n'inglés). Monthly Notices of the Royal Astronomical Society (3): páxs. 1657–1673. 25 agostu 2010. doi:10.1111/J.1365-2966.2010.16827.X.

[c8193c8a38ecb0f5a5d14be6d6a77fbdcbb86f32-6] URL de la referencia: http://www.recons.org/TOP100.posted.htm. Direición web d'archivu: https://www.webcitation.org/69Ys1TXkI?url=http://www.recons.org/TOP100.posted.htm. Data d'archivu: 31 xunetu 2012.

[985bd1bb9db23498f2eec5d357ad904d4f78472b-7] Pablo Mauas (setiembre 2014). «Trumpeting M dwarfs with CONCH-SHELL: a catalogue of nearby cool host-stars for habitable exoplanets and life» (n'inglés). Monthly Notices of the Royal Astronomical Society (3): páxs. 2561-2578. doi:10.1093/MNRAS/STU1313.

[SIMBAD-8] 1 2 BR Piscium -Flare star (SIMBAD)

[RECONS-9] 1 2 The One Hundred Nearest Star Systems (RECONS)

[10] Morales, J. C.; Ribas, I.; Jordi, C. (2008). «The effect of activity on stellar temperatures and radii». Astronomy and Astrophysics 478 (2). páxs. 507-512 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...478..507M&db_key=AST&nosetcookie=1.

[Houdebine-11] Houdebine, Y. R. (2010). «Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars». Monthly Notices of the Royal Astronomical Society 407 (3). páxs. 1657-1673. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010MNRAS.407.1657H&db_key=AST&nosetcookie=1.

[12] Bonfils, X.; Delfosse, X.; Udry, S.; Santos, N. C.; Forveille, T.; Ségransan, D. (2005). «Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence». Astronomy and Astrophysics 442 (2). páxs. 635-642. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2005A%26A...442..635B&db_key=AST&nosetcookie=1.

[13] BR Piscium (General Catalogue of Variable Stars)

[14] Stars within 15 light-years of Bonner Durchmusterung +1°4774 (The Internet Stellar Database)

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