HD 180555

**HD 180555**
观测资料; 历元 J2000
星座	天鹰座
星官
赤经	19h 16m 26.78744s
赤纬	+14° 32′ 40.6234″
视星等（V）	5.67 (5.68 + 9.58)
特性
光谱分类	B9.5V + G0IV
U−B 色指数	−0.12
B−V 色指数	−0.03
天体测定
径向速度 (Rv)	−19.3 km/s
自行 (μ)	赤经：+8.09 mas/yr ; 赤纬：+1.03 mas/yr
视差 (π)	7.96 ± 0.60 mas
距离	410 ± 30 ly ; (126 ± 9 pc)
	轨道
绕行周期 (P)	13.673 ± 0.069 yr
半长轴 (a)	0.0583 ± 0.0014"
偏心率 (e)	0.022 ± 0.010
倾斜角 (i)	131.3 ± 3.7°
升交点黄经 (Ω)	242.3 ± 4.5°
近心点历元 (T)	B 2008.572 ± 1.101
近心点幅角 (ω); (secondary)	262.7 ± 28.7°
详细资料
HD 180555 A
自转速度 (v sin i)	158 km/s
其他命名
	BD+14° 3852、HD 180555、HIP 94720、HR 7307、SAO 104668
参考数据库
SIMBAD	资料

HD 180555是位于赤道星座天鹰座的一对联星。它由两颗恒星组成，在周期8.95年，离心率为0.43的轨道上互绕。在8.32″的角分离处还有另一颗恒星，但它与系统无关^[3]。

Quick Facts 观测资料历元 J2000, 特性 ...

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参考资料

[1]
van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.
[2]
Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV Data. SIMBAD, 1986, Bibcode:1986EgUBV........0M
[3]
Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x
[4]
Cowley, A.; et al, A study of the bright A stars. I. A catalogue of spectral classifications, Astronomical Journal, April 1969, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
[5]
Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, The Revision of the General Catalogue of Radial Velocities, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 30 (University of Toronto: International Astronomical Union), June 20–24, 1966, 30: 57, Bibcode:1967IAUS...30...57E
[6]
Sixth Catalog of Orbits of Visual Binary Stars. United States Naval Observatory. [21 May 2017]. （原始内容存档于1 August 2017）.
[7]
Royer, F.; Zorec, J.; Gómez, A. E., Rotational velocities of A-type stars. III. Velocity distributions, Astronomy and Astrophysics, February 2007, 463 (2): 671–682, Bibcode:2007A&A...463..671R, S2CID 18475298, arXiv:astro-ph/0610785 , doi:10.1051/0004-6361:20065224

外部链接

这是一篇关于主序星的小作品。您可以通过编辑或修订扩充其内容。

[van_Leeuwen2007-1] [1]
van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.

[MERMILLIOD-2] [2]
Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV Data. SIMBAD, 1986, Bibcode:1986EgUBV........0M

[mnras389_2_869-3] [3]
Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x

[aj74_375-4] [4]
Cowley, A.; et al, A study of the bright A stars. I. A catalogue of spectral classifications, Astronomical Journal, April 1969, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819

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

[ORB6-6] [6]
Sixth Catalog of Orbits of Visual Binary Stars. United States Naval Observatory. [21 May 2017]. （原始内容存档于1 August 2017）.

[aaa463_2_671-7] [7]
Royer, F.; Zorec, J.; Gómez, A. E., Rotational velocities of A-type stars. III. Velocity distributions, Astronomy and Astrophysics, February 2007, 463 (2): 671–682, Bibcode:2007A&A...463..671R, S2CID 18475298, arXiv:astro-ph/0610785 , doi:10.1051/0004-6361:20065224

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观测资料历元 J2000
星座	天鹰座
星官
赤经	19^h 16^m 26.78744^s^[1]
赤纬	+14° 32′ 40.6234″^[1]
视星等（V）	5.67^[2] (5.68 + 9.58)^[3]
特性
光谱分类	B9.5V^[4] + G0IV^[3]
U−B 色指数	−0.12^[2]
B−V 色指数	−0.03^[2]
天体测定

径向速度 (R_v)	−19.3^[5] km/s
自行 (μ)	赤经：+8.09^[1] mas/yr 赤纬：+1.03^[1] mas/yr
视差 (π)	7.96 ± 0.60^[1] mas
距离	410 ± 30 ly (126 ± 9 pc)

轨道^[6]
绕行周期 (P)	13.673 ± 0.069 yr
半长轴 (a)	0.0583 ± 0.0014"
偏心率 (e)	0.022 ± 0.010
倾斜角 (i)	131.3 ± 3.7°
升交点黄经 (Ω)	242.3 ± 4.5°
近心点历元 (T)	B 2008.572 ± 1.101
近心点幅角 (ω) (secondary)	262.7 ± 28.7°
详细资料
HD 180555 A
自转速度 (v sin i)	158^[7] km/s

其他命名
BD+14° 3852、HD 180555、HIP 94720、HR 7307、SAO 104668
参考数据库
SIMBAD	资料