15 Leonis Minoris

	15 Leonis Minoris
Observationsdata; Epok: J2000.0
Stjärnbild	Stora björnen
Rektascension	09t 48m 35,37090s
Deklination	+46° 01′ 15,6312″
Skenbar magnitud ()	+5,12 (V) +5,10 (V)
Stjärntyp
Spektraltyp	G0 IV-V
U–B	+0,175
B–V	+0,619 ± 0,007
Astrometri
Radialhastighet ()	5,20 ± 0,09 km/s
Egenrörelse (µ)	RA: 221,66 mas/år; Dek.: -92,47 mas/år
Parallax ()	54,44 ± 0,28
Avstånd	59,9 ± 0,3 lå (18,37 ± 0,09 pc)
Absolut magnitud ()	3,75
Detaljer
Massa	1,15 M☉
Radie	1,52 R☉
Luminositet	2,93 L☉
Temperatur	5 859 K
Metallicitet	0,01 (Fe/H) dex
Vinkelhastighet	3,97 km/s
Ålder	9,3 miljarder år
Andra beteckningar
	LTT 12601, HD 84737, PLX 2316, TYC 3433-1531-1, HIC 48113, PLX 2316.00, UBV 9239, AG+46 800, HIP 48113, PMC 90-93 860, UBV M 15708, ASCC 326905, HR 3881, PPM 51497, USNO-B1.0 1360-00202003, BD+46 1551, IRAS 09453+4615, ROT 1509, uvby98 100084737, FK5 1255, JP11 1863, RX J0948.6+4601, WEB 8991, GC 13497, LSPM J0948+4601, SAO 43046, WISEA J094835.61+460114.6, GCRV 6291, 2MASS J09483533+4601155, SKY# 18945, MWB97 136, GEN# +1.00084737, N30 2345, SPOCS 431, Gaia DR2 821455861647126656, GJ 368, NLTT 22625, TD1 14272

15 Leonis Majoris, som är stjärnans Flamsteed-beteckning, är en ensam stjärna^[15] belägen i den mellersta delen av stjärnbilden Stora björnen. Trots dess Flamsteed-beteckning tillhör den inte Lilla lejonets stjärnbild.^[4] Den ligger på gränsen mellan stjärnbilderna och fick byta tillhörighet vid översynen av gränser mellan stjärnbilderna år 1930 och benämns sedan bytet av stjärnbild ofta HR 3881. Den har en skenbar magnitud på ca 5,12^[3] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 54,4^[2] mas, beräknas den befinna sig på ett avstånd på ca 60 ljusår (ca 18,5 parsek) från solen Den rör sig bort från solen med en heliocentrisk radialhastighet av ca 5 km/s.^[7]

Egenskaper[redigera | redigera wikitext]

15 Leonis Minoris är en gul^[16] stjärna i huvudserien av spektralklass G0 IV-V^[5] vilket betyder att den är en äldre stjärna av spektraltyp G som kan utvecklas till en underjätte när förrådet av väte i dess kärna förbrukats. Den har en massa som är ca 1,2^[9] solmassor, en radie, som baserat på stjärnans vinkeldiameter på 0,81 ± 0,01 mas^[17] beräknats till ca 1,6^[18] solradier och utsänder ca 2,9^[11] gånger mera energi än solen från dess fotosfär vid en effektiv temperatur av ca 5 900 K.^[5] Stjärnan har undersökts för ett överskott av infraröd strålning, men något sådant upptäcktes ej.^[19]

Referenser[redigera | redigera wikitext]

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, 83 Ursae Majoris, 12 oktober 2020.

Noter[redigera | redigera wikitext]

^ Hoffleit, D. (1979). "Discordances in Star Designations". Bulletin d'Information du Centre de Données Stellaires. 17: 38. Bibcode:1979BICDS..17...38H.
^ [a b c d e f] van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
^ [a b c] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", SIMBAD Astronomical Database, Bibcode:1986EgUBV........0M.
^ [a b c] ”Basic data: V* 15 LMi – High proper-motion Star” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=15+LMi&submit=SIMBAD+search. Läst 10 april 2019.
^ [a b c d e] Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
^ van Leeuwen (2007). ”Hipparcos, the New Reduction” (på engelska). http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&HIP=48113. Läst 10 april 2019.
^ [a b] Nidever, David L.; et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series, 141 (2): 503–522, arXiv:astro-ph/0112477, Bibcode:2002ApJS..141..503N, doi:10.1086/340570.
^ Luck, R. Earle; Heiter, Ulrike (2006), "Dwarfs in the Local Region", The Astronomical Journal, 131 (6): 3069–3092, Bibcode:2006AJ....131.3069L, doi:10.1086/504080.
^ [a b] Ramírez, I.; et al. (September 2012), "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets", The Astrophysical Journal, 756 (1): 46, arXiv:1207.0499, Bibcode:2012ApJ...756...46R, doi:10.1088/0004-637X/756/1/46.
^ Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. (2007). "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog". The Astrophysical Journal Supplement Series. 168 (2): 297. arXiv:astro-ph/0607235. Bibcode:2007ApJS..168..297T. doi:10.1086/509763.
^ [a b] https://www.universeguide.com/star/48113/15leonisminoris. Hämtad 2020-10-13.
^ Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725.
^ Ballering, Nicholas P.; et al. (September 2013), "A Trend between Cold Debris Disk Temperature and Stellar Type: Implications for the Formation and Evolution of Wide-orbit Planets", The Astrophysical Journal, 775 (1): 14, arXiv:1308.2223, Bibcode:2013ApJ...775...55B, doi:10.1088/0004-637X/775/1/55, 55
^ "* 15 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2016-07-19.
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 10, 2012, retrieved 2016-07-25.
^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.
^ Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:: ${\begin{aligned}2\cdot R_{*}&={\frac {(18.37\cdot 0.81\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 3.2\cdot R_{\bigodot }\end{aligned}}$
^ Moro-Martín, A.; et al. (March 2015), "Does the Presence of Planets Affect the Frequency and Properties of Extrasolar Kuiper Belts? Results from the Herschel Debris and Dunes Surveys", The Astrophysical Journal, 801 (2): 28, arXiv:1501.03813, Bibcode:2015ApJ...801..143M, doi:10.1088/0004-637X/801/2/143, 143.

Externa länkar[redigera | redigera wikitext]

https://www.universeguide.com/star/48113/15leonisminoris.

[A-1] Hoffleit, D. (1979). "Discordances in Star Designations". Bulletin d'Information du Centre de Données Stellaires. 17: 38. Bibcode:1979BICDS..17...38H.

[B-2] [a b c d e f] van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.

[C-3] [a b c] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", SIMBAD Astronomical Database, Bibcode:1986EgUBV........0M.

[SIMBAD-4] [a b c] ”Basic data: V* 15 LMi – High proper-motion Star” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=15+LMi&submit=SIMBAD+search. Läst 10 april 2019.

[D-5] [a b c d e] Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.

[hip2-6] van Leeuwen (2007). ”Hipparcos, the New Reduction” (på engelska). http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&HIP=48113. Läst 10 april 2019.

[E-7] [a b] Nidever, David L.; et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series, 141 (2): 503–522, arXiv:astro-ph/0112477, Bibcode:2002ApJS..141..503N, doi:10.1086/340570.

[F-8] Luck, R. Earle; Heiter, Ulrike (2006), "Dwarfs in the Local Region", The Astronomical Journal, 131 (6): 3069–3092, Bibcode:2006AJ....131.3069L, doi:10.1086/504080.

[G-9] [a b] Ramírez, I.; et al. (September 2012), "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets", The Astrophysical Journal, 756 (1): 46, arXiv:1207.0499, Bibcode:2012ApJ...756...46R, doi:10.1088/0004-637X/756/1/46.

[H-10] Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. (2007). "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog". The Astrophysical Journal Supplement Series. 168 (2): 297. arXiv:astro-ph/0607235. Bibcode:2007ApJS..168..297T. doi:10.1086/509763.

[UG-11] [a b] https://www.universeguide.com/star/48113/15leonisminoris. Hämtad 2020-10-13.

[I-12] Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725.

[J-13] Ballering, Nicholas P.; et al. (September 2013), "A Trend between Cold Debris Disk Temperature and Stellar Type: Implications for the Formation and Evolution of Wide-orbit Planets", The Astrophysical Journal, 775 (1): 14, arXiv:1308.2223, Bibcode:2013ApJ...775...55B, doi:10.1088/0004-637X/775/1/55, 55

[K-14] "* 15 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2016-07-19.

[L-15] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.

[P-16] "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 10, 2012, retrieved 2016-07-25.

[N-17] Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.

[O-18] Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:: ${\begin{aligned}2\cdot R_{*}&={\frac {(18.37\cdot 0.81\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 3.2\cdot R_{\bigodot }\end{aligned}}$

[M-19] Moro-Martín, A.; et al. (March 2015), "Does the Presence of Planets Affect the Frequency and Properties of Extrasolar Kuiper Belts? Results from the Herschel Debris and Dunes Surveys", The Astrophysical Journal, 801 (2): 28, arXiv:1501.03813, Bibcode:2015ApJ...801..143M, doi:10.1088/0004-637X/801/2/143, 143.

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Observationsdata Epok: J2000.0
15 Leonis Minoris^[1]

Stjärnbild	Stora björnen
Rektascension	09^t 48^m 35,37090^s^[2]
Deklination	+46° 01′ 15,6312″^[2]
Skenbar magnitud ( $V$ )	+5,12 (V)^[3] +5,10 (V)^[4]
Stjärntyp
Spektraltyp	G0 IV-V^[5]
U–B	+0,175^[3]
B–V	+0,619 ± 0,007^[6]
Astrometri
Radialhastighet ( $R_{v}$ )	5,20 ± 0,09^[7] km/s
Egenrörelse (µ)	RA: 221,66^[2] mas/år Dek.: -92,47^[2] mas/år
Parallax ( $\pi$ )	54,44 ± 0,28^[2]
Avstånd	59,9 ± 0,3 lå (18,37 ± 0,09 pc)
Absolut magnitud ( $M_{V}$ )	3,75^[8]
Detaljer
Massa	1,15^[9] M_☉
Radie	1,52^[10] R_☉
Luminositet	2,93^[11] L_☉
Temperatur	5 859^[5] K
Metallicitet	0,01 (Fe/H)^[5] dex
Vinkelhastighet	3,97^[12] km/s
Ålder	9,3^[13] miljarder år
Andra beteckningar
LTT 12601, HD 84737, PLX 2316, TYC 3433-1531-1, HIC 48113, PLX 2316.00, UBV 9239, AG+46 800, HIP 48113, PMC 90-93 860, UBV M 15708, ASCC 326905, HR 3881, PPM 51497, USNO-B1.0 1360-00202003, BD+46 1551, IRAS 09453+4615, ROT 1509, uvby98 100084737, FK5 1255, JP11 1863, RX J0948.6+4601, WEB 8991, GC 13497, LSPM J0948+4601, SAO 43046, WISEA J094835.61+460114.6, GCRV 6291, 2MASS J09483533+4601155, SKY# 18945, MWB97 136, GEN# +1.00084737, N30 2345, SPOCS 431, Gaia DR2 821455861647126656, GJ 368, NLTT 22625, TD1 14272^[4]^[14]