HD 125072

	HD 125072
Observationsdata; Epok: J2000.0
Stjärnbild	Kentauren
Rektascension	14t 19m 04,83491s
Deklination	-59° 22′ 44,5272″
Skenbar magnitud ()	+6,637 (V)
Stjärntyp
Spektraltyp	K3 IV
U–B	+0,905
B–V	+1,025
Astrometri
Radialhastighet ()	-14,9 km/s
Egenrörelse (µ)	RA: -454,35 mas/år; Dek.: -809,49 mas/år
Parallax ()	84,76 ± 0,69
Avstånd	38,5 ± 0,3 lå (11,80 ± 0,10 pc)
Absolut magnitud ()	6,28
Detaljer
Massa	0,806 ± 0,017 M☉
Temperatur	4 093 K
Metallicitet	-0,70 (Fe/H)dex
Vinkelhastighet	3,97 km/s
Ålder	9,98 miljarder år
Andra beteckningar
	LHS 2892, CD-58 5564, CPD-58 5467, GJ 542, HD 125072, HIC 69972, HIP 69972, 2MASS J14190485-5922447, NLTT 36884, PLX 3243, PPM 342746, SAO 241627, TYC 8690-554-1, uvby98 100125072, WISEA J141904.20-592252.6, Gaia DR1 866992637073091840, Gaia DR2 5866992641380992256

HD 125072 är en ensam stjärna belägen i den södra delen av stjärnbilden Kentauren. Den har en skenbar magnitud av ca 6,64^[2] och kräver åtminstone en handkikare för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 84,8^[1] mas, beräknas den befinna sig på ett avstånd på ca 39 ljusår (ca 12 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -15 km/s.^[5]

Egenskaper

HD 121504 är en orange till gul underjättestjärna av spektralklass K3 IV.^[3] Den har en massa som är ca 0,8^[6] solmassor och en effektiv temperatur av ca 4 900 K.^[3]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 125072, 2 augusti 2020.

Noter

^ [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] Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191
^ [a b c d] 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
^ [a b] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
^ [a b] Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E
^ [a b] Tsantaki, M.; et al. (July 2013), "Deriving precise parameters for cool solar-type stars. Optimizing the iron line list", Astronomy & Astrophysics, 555: A150, arXiv:1304.6639, Bibcode:2013A&A...555A.150T, doi:10.1051/0004-6361/201321103.
^ [a b] Lachaume, R.; et al. (1999). "Age determinations of main-sequence stars: combining different methods". Astronomy and Astrophysics. 348: 897–909. Bibcode:1999A&A...348..897L.
^ 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.
^ "LHS 2892 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Hämtad 2020-08-02.

[A-1] [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.

[B-2] [a b c] Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191

[C-3] [a b c d] 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

[D-4] [a b] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M

[E-5] [a b] Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E

[F-6] [a b] Tsantaki, M.; et al. (July 2013), "Deriving precise parameters for cool solar-type stars. Optimizing the iron line list", Astronomy & Astrophysics, 555: A150, arXiv:1304.6639, Bibcode:2013A&A...555A.150T, doi:10.1051/0004-6361/201321103.

[G-7] [a b] Lachaume, R.; et al. (1999). "Age determinations of main-sequence stars: combining different methods". Astronomy and Astrophysics. 348: 897–909. Bibcode:1999A&A...348..897L.

[H-8] 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.

[I-9] "LHS 2892 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Hämtad 2020-08-02.

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Observationsdata Epok: J2000.0
HD 125072

Stjärnbild	Kentauren
Rektascension	14^t 19^m 04,83491^s^[1]
Deklination	-59° 22′ 44,5272″^[1]
Skenbar magnitud ( $V$ )	+6,637 (V)^[2]
Stjärntyp
Spektraltyp	K3 IV^[3]
U–B	+0,905^[4]
B–V	+1,025^[4]
Astrometri
Radialhastighet ( $R_{v}$ )	-14,9^[5] km/s
Egenrörelse (µ)	RA: -454,35^[1] mas/år Dek.: -809,49^[1] mas/år
Parallax ( $\pi$ )	84,76 ± 0,69^[1]
Avstånd	38,5 ± 0,3 lå (11,80 ± 0,10 pc)
Absolut magnitud ( $M_{V}$ )	6,28^[2]
Detaljer
Massa	0,806 ± 0,017^[6] M_☉
Temperatur	4 093^[3] K
Metallicitet	-0,70 (Fe/H)^[7]dex
Vinkelhastighet	3,97^[8] km/s
Ålder	9,98^[7] miljarder år
Andra beteckningar
LHS 2892, CD-58 5564, CPD-58 5467, GJ 542, HD 125072, HIC 69972, HIP 69972, 2MASS J14190485-5922447, NLTT 36884, PLX 3243, PPM 342746, SAO 241627, TYC 8690-554-1, uvby98 100125072, WISEA J141904.20-592252.6, Gaia DR1 866992637073091840, Gaia DR2 5866992641380992256 ^[9]

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HD 125072

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