Pi Draconis

Pi Draconis
Data pengamatan; Epos J2000.0 Ekuinoks J2000.0 (ICRS)
Rasi bintang	Draco
Asensio rekta	19j 20m 40.09333d
Deklinasi	+65° 42′ 52.3095″
Magnitudo tampak (V)	4.59
Ciri-ciri
Kelas spektrum	A2 IIIs
Indeks warna U−B	+0.06
Indeks warna B−V	+0.02
Astrometri
Kecepatan radial (Rv)	−28.1 ± 1.1 km/s
Gerak diri (μ)	RA: +15.09 mdb/thn ; Dek.: +41.12 mdb/thn
Paralaks (π)	14,25±0,12 mdb
Jarak	229 ± 2 tc ; (70,2 ± 0,6 pc)
Magnitudo mutlak (MV)	+0.37
Detail
Massa	2.70 M☉
Radius	3.2 R☉
Luminositas	60 L☉
Gravitasi permukaan (log g)	3.80
Suhu	9,125 K
Metalisitas [Fe/H]	0.42
Kecepatan rotasi (v sin i)	26±1 km/s
Usia	350 megatahun
Penamaan lain
	π Dra, 58 Dra, BD+65° 1345, FK5 3547, HD 182564, HIP 95081, HR 7371, SAO 18299
Referensi basis data
SIMBAD	data

Pi Draconis (π Dra / π Draconis) adalah salah satu bintang pada rasi Draco . Bintang ini memiliki magnitudo 4.60 dan merupakan bintang dengan kelas F8IV-V. Bintang ini berada pada jarak 225 tahun cahaya dari Bumi.

Etimologi[sunting | sunting sumber]

Nama tradisional bintang ini adalah Tais I atau Tais al Awwal^[12] yang berarti "kambing pertama" dalam bahasa Arab.

Nama lainnya untuk bintang ini adalah:

nama lain	asal bahasa	arti
天廚六 / Tiānchúliù	China	bintang keenam pada rasi Dapur di Langit^[13]

Selain rasi Draco, bintang ini juga merupakan anggota dari berbagai rasi atau asterisma berikut:

nama rasi / asterisma	asal	arti	anggota lainnya
天廚 / Tiānchú	China	Dapur di Langit	δ Dra, σ Dra, ε Dra, ρ Dra, 64 Dra
Al Tāis^[14]	Arab	kambing	δ Dra, ε Dra, ρ Dra

Referensi[sunting | sunting sumber]

^ ^a ^b ^c ^d ^e 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 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
^ ^a ^b Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255 , Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943.
^ 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.
^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053 , Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
^ ^a ^b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
^ ^a ^b De Rosa, R. J.; et al. (January 2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141 , Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932.
^ Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (edisi ke-3rd), Birkhäuser, ISBN 3-540-29692-1. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(70.2\cdot 0.427\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 6.4\cdot R_{\bigodot }\end{aligned}}$
^ McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427: 343, arXiv:1208.2037 , Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
^ ^a ^b Yüce, Kutluay; Adelman, Saul J. (April 2014), "Elemental Abundance Analyses with DAO Spectrograms. XXXIV. A Three-Dimensional Graphical Examination of the Elemental Abundances of the Mercury-Manganese and Metallic-Line Stars", Publications of the Astronomical Society of the Pacific, 126 (938): 345, Bibcode:2014PASP..126..345Y, doi:10.1086/676335.
^ "pi. Dra". SIMBAD. Centre de données astronomiques de Strasbourg. Diakses tanggal 2017-05-30.
^ http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf
^ salah satu rasi bintang menurut bangsa Cina
^ http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Draco*.html

Artikel bertopik bintang ini adalah sebuah rintisan. Anda dapat membantu Wikipedia dengan mengembangkannya.

[vanLeeuwen2007-1] 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.

[Johnson1966-2] Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.

[Royer2002-3] Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255 , Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943.

[Eggleton2008-4] 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.

[Gontcharov2006-5] Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053 , Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.

[Anderson2012-6] Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.

[DeRosa2014-7] De Rosa, R. J.; et al. (January 2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141 , Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932.

[lang2006-8] Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (edisi ke-3rd), Birkhäuser, ISBN 3-540-29692-1. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(70.2\cdot 0.427\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 6.4\cdot R_{\bigodot }\end{aligned}}$

[mcdonald2012-9] McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427: 343, arXiv:1208.2037 , Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.

[Yuece2014-10] Yüce, Kutluay; Adelman, Saul J. (April 2014), "Elemental Abundance Analyses with DAO Spectrograms. XXXIV. A Three-Dimensional Graphical Examination of the Elemental Abundances of the Mercury-Manganese and Metallic-Line Stars", Publications of the Astronomical Society of the Pacific, 126 (938): 345, Bibcode:2014PASP..126..345Y, doi:10.1086/676335.

[SIMBAD-11] "pi. Dra". SIMBAD. Centre de données astronomiques de Strasbourg. Diakses tanggal 2017-05-30.

[12] ttp://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf

[sb1-13] salah satu rasi bintang menurut bangsa Cina

[sb0-14] ttp://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Draco*.html

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Data pengamatan Epos J2000.0 Ekuinoks J2000.0 (ICRS)
Rasi bintang	Draco
Asensio rekta	19^j 20^m 40.09333^d^[1]
Deklinasi	+65° 42′ 52.3095″^[1]
Magnitudo tampak (V)	4.59^[2]
Ciri-ciri
Kelas spektrum	A2 IIIs^[3]^[4]
Indeks warna U−B	+0.06^[2]
Indeks warna B−V	+0.02^[2]
Astrometri

Kecepatan radial (R_v)	−28.1 ± 1.1^[5] km/s
Gerak diri (μ)	RA: +15.09^[1] mdb/thn Dek.: +41.12^[1] mdb/thn
Paralaks (π)	14,25±0,12^[1] mdb
Jarak	229 ± 2 tc (70,2 ± 0,6 pc)
Magnitudo mutlak (M_V)	+0.37^[6]

Detail

Massa	2.70^[7] M_☉
Radius	3.2^[8] R_☉
Luminositas	60^[9] L_☉
Gravitasi permukaan (log g)	3.80^[10]
Suhu	9,125^[10] K
Metalisitas [Fe/H]	0.42^[6]
Kecepatan rotasi (v sin i)	26±1^[3] km/s
Usia	350^[7] megatahun

Penamaan lain
π Dra, 58 Dra, BD+65° 1345, FK5 3547, HD 182564, HIP 95081, HR 7371, SAO 18299^[11]
Referensi basis data
SIMBAD	data