Pi1 Ursae Majoris

Pi1 Ursae Majoris
	estrella, near-IR source (en) y UV-emission source (en)
Parte de	Asociación estelar de la Osa Mayor (es)
Datos d'observación
Ascensión reuta (α)	129,7987692137 °
Declinación (δ)	65,02090642292 °
Distancia a la Tierra	14,439 pc
Magnitú aparente (V)	5,64 (banda V)
Magnitú absoluta	4,86
Constelación	Sietestrellu
Velocidá de rotación	10,4 km/s
Velocidá radial	−12,826 km/s
Parallax	69,2576 mas
Carauterístiques físiques
Masa	0,9 M☉
Gravedá superficial	31 000 cm/s²
Tipu espectral	G0.5V
Otros nomes
	Ver llista IRAS 08347+6511 (IRAS (es) ); 2MASS J08391162+6501151 (2MASS (es) ); SAO 14609 (Catálogu SAO); GSC 04133-01971 (Guide Star Catalog (es) ); HD 72905 (Catálogu Henry Draper); HIP 42438 (Catálogu Hipparcos); HR 3391 (Bright Star Catalogue); GJ 311 (Catálogu Gliese); 1ES 0834+65.1 (Einstein Slew survey, Version No. 1 (en) ); PLX 2047.1 (General Catalogue of Trigonometric Stellar Parallaxes (es) ); 1RXS J083912.0+650118 (1RXS (en) ); 2EUVE J0839+65.0 (The second Extreme Ultraviolet Explorer source catalog (en) ); BD+65 643 (Bonner Durchmusterung); EUVE J0839+65.0 (The first Extreme Ultraviolet Explorer source catalog (en) ); GC 11817 (Boss General Catalogue (es) ); GCRV 5666 (General Catalogue of Stellar Radial Velocities (es) ); HIC 42438 (Hipparcos Input Catalogue (en) ); JP11 1687 (JP11 (en) ); N30 2004 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ); NSV 17937 (New Catalogue of Suspected Variable Stars (es) ); PPM 16705 (Catálogo de estrellas PPM (es) ); RBS 714 (ROSAT All-Sky Survey Bright Source Catalogue (en) ); ROT 1354 (Catalogue of rotational velocities of the stars (en) ); TD1 12726 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ); TYC 4133-1971-1 (Tycho Catalogue (en) ); UBV 8155 (UBV Photoelectric Photometry Catalogue (en) ); uvby98 100072905 (uvbyβ Photoelectric Photometric Catalogue (en) ); PLX 2047.10 (General Catalogue of Trigonometric Stellar Parallaxes (es) ); EUVE J0839+64.9 (The first Extreme Ultraviolet Explorer source catalog (en) ); pi.01 UMa (General Catalogue of Variable Stars); SPOCS 2720 (Spectroscopic Properties of Cool Stars (en) ); RX J0839.1+6501 (X-ray survey of the Large Magellanic Cloud by ROSAT (en) ); RX J0839.2+6501 (X-ray survey of the Large Magellanic Cloud by ROSAT (en) ); [ZEH2003] RX J0839.2+6501 1 (The Hamburg/RASS Catalogue of optical identifications. Northern high-galactic latitude ROSAT Bright Source Catalogue X-ray sources (en) ); Gaia DR1 1092545706218403072 (Gaia DR1 (es) ); WEB 8162 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue (en) ); Gaia DR2 1092545710514654464 (Gaia DR2 (es) ); π¹ UMa (Denominación de Bayer); 3 UMa (Denominación de Flamsteed (es) ); AG+65 441 (AGK3U (en) ); Gaia DR3 1092545710514654464 (Gaia DR3 (es) ); UBV M 14477 (UBV Photoelectric Photometry Catalogue (en) ); TIC 417762326 (TESS Input Catalog (en) );

Coordenaes: 8^h 39^m 11.705^s, 65^° 1^′ 15.263^″

Pi1 Ursae Majoris (π¹ UMa / 3 Ursae Majoris)^[8] ye una estrella na constelación del sietestrellu de magnitú aparente +5,65. Recibe'l nome tradicional de Muscida, utilizáu tamién pa designar a Ómicron Ursae Majoris y Pi2 Ursae Majoris. Asitiada a 46,8 años lluz del Sistema Solar, Pi1 Ursae Majoris forma parte de la corriente d'estrelles de l'Asociación estelar del sietestrellu.^[8]

Pi1 Ursae Majoris ye una nana mariella de tipu espectral G1.5Vb,^[8] en munchos aspeutos asemeyáu al nuesu Sol. Con una temperatura efectivo de 5768 K,^[9] el so diámetru correspuende al 95% del diámetru solar.^[10] Una diferencia notable col Sol ye la so edá, envalorada en namái 240 millones d'años,^[11] lo que supón pocu más del 5% de la edá de la nuesa estrella. Exhibe una bayura relativa de fierro daqué inferior a la solar, en redol al 90% de la mesma.^[12] ^[13] Apaez catalogada como variable BY Draconis,^[8] clase de variables que les sos fluctuaciones acomuñar a la presencia de manches na so superficie o otru tipu d'actividá cromosférica.

Al igual qu'estrelles como HD 69830 o HD 76151, Pi1 Ursae Majoris amuesa un escesu nel infrarroxu a 30-34 μm y 70 μm, lo que suxure la esistencia d'un discu circumestelar de polvu al so alredor.^[14] Observaciones col Telescopiu espacial Spitzer en llonxitú d'onda de 160 μm, imponen ciertes propiedaes físiques al discu, tales como una temperatura de más de 36 K y una masa inferior a 0,36 × 10^-4 vegaes la masa de la Lluna.^[15]

Ver tamién

Llista d'estrelles brilloses más cercanes

Referencies

↑ ^1,0 ^1,1 ^1,2 ^1,3 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.
↑ Caroline Soubiran (agostu 2018). «Gaia Data Release 2. The catalogue of radial velocity standard stars» (n'inglés). Astronomy and Astrophysics. doi:10.1051/0004-6361/201832795.
↑ Eva Gloria Villaver Sobrino (25 abril 2012). «Metallicity of solar-type stars with debris discs and planets» (n'inglés). Astronomy and Astrophysics: páxs. 40–40. doi:10.1051/0004-6361/201218800.
↑ «The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars» (n'inglés). The Astronomical Journal (4): páxs. 2148–2158. abril 2001. doi:10.1086/319956.
↑ ^8,0 ^8,1 ^8,2 ^8,3 3 UMa - Variable of BY Dra type (SIMBAD)
↑ 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). páxs. 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.
↑ Masana, E.; Jordi, C.; Ribas, I. (2006). «Effective temperature scale and bolometric corrections from 2MASS photometry». Astronomy and Astrophysics 450 (2). páxs. 735-746 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2006A%26A...450..735M&db_key=AST&nosetcookie=1.
↑ Heinze, A. N.; Hinz, Philip M.; Sivanandam, Suresh; Kenworthy, Matthew; Meyer, Michael; Miller, Douglas (2010). «Constraints on Long-period Planets from an L'- and M-band Survey of Nearby Sun-like Stars: Observations». The Astrophysical Journal 714 (2). páxs. 1551-1569. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010ApJ...714.1551H&db_key=AST&nosetcookie=1.
↑ Mármol-Queraltó, Y.; Cardiel, N.; Cenarro, A. J.; Vazdekis, A.; Gorgas, J.; Pedraz, S.; Peletier, R. F.; Sánchez-Blázquez, P. (2008). «A new stellar library in the region of the CO index at 2.3 μm. New index definition and empirical fitting functions». Astronomy and Astrophysics 489 (2). páxs. 885-909. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...489..885M&db_key=AST&nosetcookie=1.
↑ Ramírez, I.; Allende Prieto, C.; Lambert, D. L. (2007). «Oxygen abundances in nearby stars. Clues to the formation and evolution of the Galactic disk». Astronomy and Astrophysics 456 (1). páxs. 271-289 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007A%26A...465..271R&db_key=AST&nosetcookie=1.
↑ Beichman, C. A.; Tanner, A.; Bryden, G.; Stapelfeldt, K. R.; Werner, M. W.; Rieke, G. H.; Trilling, D. E.; Lawler, S.; Gautier, T. N. (2006). «IRS Spectra of Solar-Type Stars: A Search for Asteroid Belt Analogs». The Astrophysical Journal 639 (2). páxs. 1166-1176. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006ApJ...639.1166B&db_key=AST&data_type=HTML&format=&high=4379y0cbc924453.
↑ Tanner, Angelle; Beichman, Charles; Bryden, Geoff; Lisse, Carey; Lawler, Samantha (2009). «Survey of Nearby FGK Stars at 160 μm with Spitzer». The Astrophysical Journal 704 (1). páxs. 109-116. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009ApJ...704..109T&db_key=AST&nosetcookie=1.

Coordenaes: 8^h 39^m 11.705^s, 65^° 1^′ 15.263^″

[8ba559d5760a03bedaaacc3c347bbfe4981560bf-1] 1,0 ^1,1 ^1,2 ^1,3 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.

[3bf3b74f599a0eb91eecfea10ab3e78fe4e80b5e-5] Caroline Soubiran (agostu 2018). «Gaia Data Release 2. The catalogue of radial velocity standard stars» (n'inglés). Astronomy and Astrophysics. doi:10.1051/0004-6361/201832795.

[e6e54dfbcc9c2a79efae5661bfcf591ea26da34a-6] Eva Gloria Villaver Sobrino (25 abril 2012). «Metallicity of solar-type stars with debris discs and planets» (n'inglés). Astronomy and Astrophysics: páxs. 40–40. doi:10.1051/0004-6361/201218800.

[6c3ffe6127a33381fd4ff3b2c5aa087ef29316c2-7] «The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars» (n'inglés). The Astronomical Journal (4): páxs. 2148–2158. abril 2001. doi:10.1086/319956.

[SIMBAD-8] 8,0 ^8,1 ^8,2 ^8,3 3 UMa - Variable of BY Dra type (SIMBAD)

[Geneva2009-9] 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). páxs. 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.

[Masana-10] Masana, E.; Jordi, C.; Ribas, I. (2006). «Effective temperature scale and bolometric corrections from 2MASS photometry». Astronomy and Astrophysics 450 (2). páxs. 735-746 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2006A%26A...450..735M&db_key=AST&nosetcookie=1.

[Heinze2010-11] Heinze, A. N.; Hinz, Philip M.; Sivanandam, Suresh; Kenworthy, Matthew; Meyer, Michael; Miller, Douglas (2010). «Constraints on Long-period Planets from an L'- and M-band Survey of Nearby Sun-like Stars: Observations». The Astrophysical Journal 714 (2). páxs. 1551-1569. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010ApJ...714.1551H&db_key=AST&nosetcookie=1.

[Marmol-12] Mármol-Queraltó, Y.; Cardiel, N.; Cenarro, A. J.; Vazdekis, A.; Gorgas, J.; Pedraz, S.; Peletier, R. F.; Sánchez-Blázquez, P. (2008). «A new stellar library in the region of the CO index at 2.3 μm. New index definition and empirical fitting functions». Astronomy and Astrophysics 489 (2). páxs. 885-909. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...489..885M&db_key=AST&nosetcookie=1.

[Ramirez-13] Ramírez, I.; Allende Prieto, C.; Lambert, D. L. (2007). «Oxygen abundances in nearby stars. Clues to the formation and evolution of the Galactic disk». Astronomy and Astrophysics 456 (1). páxs. 271-289 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007A%26A...465..271R&db_key=AST&nosetcookie=1.

[Beichman-14] Beichman, C. A.; Tanner, A.; Bryden, G.; Stapelfeldt, K. R.; Werner, M. W.; Rieke, G. H.; Trilling, D. E.; Lawler, S.; Gautier, T. N. (2006). «IRS Spectra of Solar-Type Stars: A Search for Asteroid Belt Analogs». The Astrophysical Journal 639 (2). páxs. 1166-1176. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006ApJ...639.1166B&db_key=AST&data_type=HTML&format=&high=4379y0cbc924453.

[Tanner-15] Tanner, Angelle; Beichman, Charles; Bryden, Geoff; Lisse, Carey; Lawler, Samantha (2009). «Survey of Nearby FGK Stars at 160 μm with Spitzer». The Astrophysical Journal 704 (1). páxs. 109-116. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009ApJ...704..109T&db_key=AST&nosetcookie=1.

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