拉卡伊9352

**拉卡伊9352 (Lacaille 9352)**
觀測資料; 曆元 J2000
星座	南魚座
星官
赤經	23h 05m 52.0353s
赤緯	–35° 51′ 11.055″
視星等（V）	7.34
特性
光谱分类	M0.5V
U−B 色指数	+1.18
B−V 色指数	+1.50
变星类型	可疑的
天体测定
徑向速度 (Rv)	+9.7 km/s
自行 (μ)	赤经：6,766.63 mas/yr ; 赤纬：1,327.99 mas/yr
视差 (π)	303.89 ± 0.87 mas
距离	10.73 ± 0.03 ly ; (3.291 ± 0.009 pc)
绝对星等 (MV)	9.75
詳細資料
質量	0.503 ± 0.025 M☉
半徑	0.459 ± 0.011 R☉
亮度	0.011 L☉
溫度	3,626 K
金屬量
自轉速度 (v sin i)	1 km/s
其他命名
	HD 217987, CD -36°15693 GCTP 5584, GJ 887, LHS 70, SAO 214301, LTT 9348, LFT 1758, Cordoba 31353, NSV 14420, HIP 114046, UGPMF 591.

拉卡伊9352 （Lac 9352）是一顆紅矮星，與太陽系的地球距離大約3.29秒差距或10.74光年。它是已知自行第4高的恆星^[7]，每年移動的總量是6.9 角秒（這還是非常小的移動量，因為1度有3,600角秒。），是離太陽系第10近的恆星^[8]，並且是南魚座中最靠近的恆星。ChView的模擬^[9]顯示最靠近它的恆星是寶瓶座EZ三合星，與拉卡伊9352的距離大約是4.1光年。

這是第一顆被測量出角直徑的紅矮星^[10]空間速度的三個分量(U, V, W) = (–93.9, –14.1, –51.4) km/s.^[11] 。如果徑向速度（V_r）是+9.7公里/秒，則在2,700年前拉卡伊9352與太陽最接近的距離大約是3.26秒差距^[12]。

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 ^1.7 NAME LACAILLE 9352 -- Pre-main sequence Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-01-20].
^ ^2.0 ^2.1 ^2.2 ^2.3 Demory, B.-O.; et al. Mass-radius relation of low and very low-mass stars revisited with the VLTI. Astronomy and Astrophysics. October 2009, 505 (1): 205–215. Bibcode:2009A&A...505..205D. doi:10.1051/0004-6361/200911976.
^ ^3.0 ^3.1 Cousins, A. W. J. UBV photometry of some southern stars. Monthly Notes of the Astronomical Society of Southern Africa. 1973, 32: 11. Bibcode:1973MNSSA..32...11C.
^ Micela, G.; Pye, J.; Sciortino, S. Coronal properties of nearby old disk and halo dM stars. Astronomy and Astrophysics. April 1997, 320: 865–877. Bibcode:1997A&A...320..865M.
^ López-Morales, Mercedes. On the Correlation between the Magnetic Activity Levels, Metallicities, and Radii of Low-Mass Stars. The Astrophysical Journal. May 2007, 660 (1): 732–739. Bibcode:2007ApJ...660..732L. arXiv:astro-ph/0701702 . doi:10.1086/513142.
^ Torres, C. A. O. Search for associations containing young stars (SACY). I. Sample and searching method. Astronomy and Astrophysics. December 2006, 460 (3): 695–708. Bibcode:2006A&A...460..695T. arXiv:astro-ph/0609258 . doi:10.1051/0004-6361:20065602.
^ High Proper Motion Stars in the Hipparcos Catalogue. European Space Agency. July 1, 2007 [2010-01-20].
^ Research Consortium on Nearby Stars. The One Hundred Nearest Star Systems. Georgia State University. [2010-01-20]. （原始内容存档于2012-05-13）.
^ Solstation and ChView. [2010-04-20]. （原始内容存档于2012-02-26）.
^ Glindemann, Andreas; Paresce, Francesco. Giant Eyes for the VLT Interferometer. European Southern Observatory. [2010-01-20].
^ ARICNS star page of Lacaille 9352. Astronomisches Rechen-Institut Heidelberg. [2010-04-16].
^ Annotations on NAME LACAILLE 9352 object. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-04-16]. （原始内容存档于2011-07-21）.

外部連結

SolStation.com: Lacaille 9352

[SIMBAD-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 ^1.7 NAME LACAILLE 9352 -- Pre-main sequence Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-01-20].

[aaa505-2] 2.0 ^2.1 ^2.2 ^2.3 Demory, B.-O.; et al. Mass-radius relation of low and very low-mass stars revisited with the VLTI. Astronomy and Astrophysics. October 2009, 505 (1): 205–215. Bibcode:2009A&A...505..205D. doi:10.1051/0004-6361/200911976.

[mnrassa32-3] 3.0 ^3.1 Cousins, A. W. J. UBV photometry of some southern stars. Monthly Notes of the Astronomical Society of Southern Africa. 1973, 32: 11. Bibcode:1973MNSSA..32...11C.

[4] Micela, G.; Pye, J.; Sciortino, S. Coronal properties of nearby old disk and halo dM stars. Astronomy and Astrophysics. April 1997, 320: 865–877. Bibcode:1997A&A...320..865M.

[5] López-Morales, Mercedes. On the Correlation between the Magnetic Activity Levels, Metallicities, and Radii of Low-Mass Stars. The Astrophysical Journal. May 2007, 660 (1): 732–739. Bibcode:2007ApJ...660..732L. arXiv:astro-ph/0701702 . doi:10.1086/513142.

[6] Torres, C. A. O. Search for associations containing young stars (SACY). I. Sample and searching method. Astronomy and Astrophysics. December 2006, 460 (3): 695–708. Bibcode:2006A&A...460..695T. arXiv:astro-ph/0609258 . doi:10.1051/0004-6361:20065602.

[7] High Proper Motion Stars in the Hipparcos Catalogue. European Space Agency. July 1, 2007 [2010-01-20].

[8] Research Consortium on Nearby Stars. The One Hundred Nearest Star Systems. Georgia State University. [2010-01-20]. （原始内容存档于2012-05-13）.

[SolStation-9] Solstation and ChView. [2010-04-20]. （原始内容存档于2012-02-26）.

[10] Glindemann, Andreas; Paresce, Francesco. Giant Eyes for the VLT Interferometer. European Southern Observatory. [2010-01-20].

[11] ARICNS star page of Lacaille 9352. Astronomisches Rechen-Institut Heidelberg. [2010-04-16].

[12] Annotations on NAME LACAILLE 9352 object. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-04-16]. （原始内容存档于2011-07-21）.

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觀測資料曆元 J2000
星座	南魚座
星官
赤經	23^h 05^m 52.0353^s^[1]
赤緯	–35° 51′ 11.055″^[1]
視星等（V）	7.34^[1]
特性
光谱分类	M0.5V^[2]
U−B 色指数	+1.18^[3]
B−V 色指数	+1.50^[3]
变星类型	可疑的^[4]
天体测定

徑向速度 (R_v)	+9.7^[1] km/s
自行 (μ)	赤经：6,766.63^[1] mas/yr 赤纬：1,327.99^[1] mas/yr
视差 (π)	303.89 ± 0.87^[1] mas
距离	10.73 ± 0.03 ly (3.291 ± 0.009 pc)
绝对星等 (M_V)	9.75

詳細資料

質量	0.503 ± 0.025^[2] M_☉
半徑	0.459 ± 0.011^[2] R_☉
亮度	0.011 L_☉
溫度	3,626^[2] K
金屬量	${\begin{smallmatrix}\left[{\frac {Fe}{H}}\right]\ =\ -0.22\pm -0.09\end{smallmatrix}}$ ^[5]
自轉速度 (v sin i)	1^[6] km/s

其他命名
HD 217987, CD -36°15693 GCTP 5584, GJ 887, LHS 70, SAO 214301, LTT 9348, LFT 1758, Cordoba 31353, NSV 14420, HIP 114046, UGPMF 591.^[1]

相關條目

參考資料

外部連結