Delta Draconis

δ Draconis
	; Lokasi δ Draconis (dilingkari)
Data pengamatan; Epos J2000 Ekuinoks J2000
Rasi bintang	Draco
Asensio rekta	19j 12m 33.30197d
Deklinasi	+67° 39′ 41.5456″
Magnitudo tampak (V)	3.07
Ciri-ciri
Kelas spektrum	G9 III
Indeks warna U−B	+0.78
Indeks warna B−V	+1.00
Astrometri
Kecepatan radial (Rv)	+24.8 km/s
Gerak diri (μ)	RA: +95.74 mdb/thn ; Dek.: +91.92 mdb/thn
Paralaks (π)	33,48±0,10 mdb
Jarak	97,4 ± 0,3 tc ; (29,87 ± 0,09 pc)
Magnitudo mutlak (MV)	+0.62
Detail
Massa	2.32 M☉
Radius	11 R☉
Luminositas	59 L☉
Gravitasi permukaan (log g)	2.98
Suhu	4,820 K
Metalisitas [Fe/H]	–0.27
Kecepatan rotasi (v sin i)	8 km/s
Usia	0.8 gigatahun
Penamaan lain
	Aldib, Altais, Nodus Secundus, 57 Draconis, HR 7310, BD+67 1129, HD 180711, SAO 18222, FK5 723, HIP 94376.
Referensi basis data
SIMBAD	data

Delta Draconis (δ Dra / δ Draconis) adalah bintang kuning yang berada di rasi Draco. Delta Draconis memiliki magnitudo +3.07 dan termasuk bintang berkelas G9III. Bintang ini berada pada jarak 100 tahun cahaya dari Bumi.

Etimologi[sunting | sunting sumber]

Bintang ini memiliki nama tradisional Aldib.^[12] Nama lainnya untuk bintang ini adalah:

nama lain	asal bahasa	arti
Altais	Arab	kambing^[13]
Nodus Secundus	Latin	ikatan kedua^[13]^[14]
天廚一 / Tiānchúyī	China	bintang pertama pada rasi Dapur di Langit^[15]

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	σ Dra, ε Dra, ρ Dra, 64 Dra, π Dra
Al Tāis^[13]	Arab	kambing	ε Dra, ρ Dra, π Dra

Referensi[sunting | sunting sumber]

^ ^a ^b ^c ^d ^e van Leeuwen, F. (November 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.; Mitchell; Iriarte; Wisniewski (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
^ Roman, Nancy G. (July 1952). "The Spectra of the Bright Stars of Types F5-K5". Astrophysical Journal. 116: 122. Bibcode:1952ApJ...116..122R. doi:10.1086/145598.
^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
^ ^a ^b ^c ^d Takeda, Yoichi; et al. (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan, 60 (4): 781–802, arXiv:0805.2434 , Bibcode:2008PASJ...60..781T, doi:10.1093/pasj/60.4.781
^ The Sun has a radius of 0.004652 AU. Thus:
Stellar diameter = 1 AU × angular diameter/parallax = 3.37/32.54 AU = 0.10 AU = 22 R_☉.
See: Lochner, Jim; Gibb, Meredith; Newman, Phil (January 30, 2006). "Using Optical Observations to find the Diameter of HT Cas". NASA. Diarsipkan dari versi asli tanggal 2010-06-01. Diakses tanggal 2010-04-06.
^ ^a ^b ^c McWilliam, Andrew (December 1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". Astrophysical Journal Supplement Series. 74: 1075–1128. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527.
^ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1): 1. Bibcode:1970CoAsi.239....1B.
^ Bakich, Michael E. (1995). The Cambridge guide to the constellations. Cambridge University Press. hlm. 184. ISBN 0-521-44921-9.
^ Kaler, James B. "Nodus Secundus". STARS. University of Illinois. Diakses tanggal 2010-04-06.
^ "del Dra -- Star in double system". SIMBAD. Centre de Données astronomiques de Strasbourg. Diakses tanggal 2010-04-06.
^ Atlas of the Heavens, part II, catalogue, Antonín Bečvář
^ ^a ^b ^c http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Draco*.html
^ rasi ini memiliki empat simpul
^ salah satu rasi bintang menurut bangsa Cina

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

[aaa474_2_653-1] van Leeuwen, F. (November 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

[clpl4_99-2] Johnson, H. L.; Mitchell; Iriarte; Wisniewski (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.

[apj116-3] Roman, Nancy G. (July 1952). "The Spectra of the Bright Stars of Types F5-K5". Astrophysical Journal. 116: 122. Bibcode:1952ApJ...116..122R. doi:10.1086/145598.

[gcsrv-4] Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.

[pasj60_4_781-5] Takeda, Yoichi; et al. (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan, 60 (4): 781–802, arXiv:0805.2434 , Bibcode:2008PASJ...60..781T, doi:10.1093/pasj/60.4.781

[diameter-6] The Sun has a radius of 0.004652 AU. Thus:
Stellar diameter = 1 AU × angular diameter/parallax = 3.37/32.54 AU = 0.10 AU = 22 R_☉.
See: Lochner, Jim; Gibb, Meredith; Newman, Phil (January 30, 2006). "Using Optical Observations to find the Diameter of HT Cas". NASA. Diarsipkan dari versi asli tanggal 2010-06-01. Diakses tanggal 2010-04-06.

[ajss74-7] McWilliam, Andrew (December 1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". Astrophysical Journal Supplement Series. 74: 1075–1128. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527.

[csrv-8] Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1): 1. Bibcode:1970CoAsi.239....1B.

[bakich95-9] Bakich, Michael E. (1995). The Cambridge guide to the constellations. Cambridge University Press. hlm. 184. ISBN 0-521-44921-9.

[kaler-10] Kaler, James B. "Nodus Secundus". STARS. University of Illinois. Diakses tanggal 2010-04-06.

[simbad-11] "del Dra -- Star in double system". SIMBAD. Centre de Données astronomiques de Strasbourg. Diakses tanggal 2010-04-06.

[12] Atlas of the Heavens, part II, catalogue, Antonín Bečvář

[sb0-13] ttp://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Draco*.html

[14] rasi ini memiliki empat simpul

[sb1-15] salah satu rasi bintang menurut bangsa Cina

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Data pengamatan Epos J2000 Ekuinoks J2000
Lokasi δ Draconis (dilingkari)
Rasi bintang	Draco
Asensio rekta	19^j 12^m 33.30197^d^[1]
Deklinasi	+67° 39′ 41.5456″^[1]
Magnitudo tampak (V)	3.07^[2]
Ciri-ciri
Kelas spektrum	G9 III^[3]
Indeks warna U−B	+0.78^[2]
Indeks warna B−V	+1.00^[2]
Astrometri

Kecepatan radial (R_v)	+24.8^[4] km/s
Gerak diri (μ)	RA: +95.74^[1] mdb/thn Dek.: +91.92^[1] mdb/thn
Paralaks (π)	33,48±0,10^[1] mdb
Jarak	97,4 ± 0,3 tc (29,87 ± 0,09 pc)
Magnitudo mutlak (M_V)	+0.62^[5]

Detail

Massa	2.32^[5] M_☉
Radius	11^[6] R_☉
Luminositas	59^[5] L_☉
Gravitasi permukaan (log g)	2.98^[7]
Suhu	4,820^[7] K
Metalisitas [Fe/H]	–0.27^[7]
Kecepatan rotasi (v sin i)	8^[8] km/s
Usia	0.8^[5] gigatahun

Penamaan lain
Aldib, Altais,^[9] Nodus Secundus,^[10] 57 Draconis, HR 7310, BD+67 1129, HD 180711, SAO 18222, FK5 723, HIP 94376.^[11]
Referensi basis data
SIMBAD	data