葛羅姆布里吉1830

**葛羅姆布里吉1830 (Groombridge 1830)**
	紅點顯示出葛羅姆布里吉1830在大熊座的位置。
觀測資料; 曆元 J2000
星座	大熊座
星官
赤經	11h 52m 58.7691s
赤緯	+37° 43′ 07.239″
視星等（V）	6.44
特性
光谱分类	G8Vp
U−B 色指数	+0.16
B−V 色指数	+0.75
变星类型	Suspected
天体测定
徑向速度 (Rv)	-98.0 km/s
自行 (μ)	赤经：4,003.69 mas/yr ; 赤纬：-5,813.00 mas/yr
视差 (π)	109.22 ± 0.78 mas
距离	29.9 ± 0.2 ly ; (9.16 ± 0.07 pc)
绝对星等 (MV)	6.62
詳細資料
質量	0.661 M☉
半徑	0.66 R☉
表面重力 (log g)	4.68
亮度	0.19 L☉
溫度	5,074 K
金屬量	[Fe/H] = -1.33
年齡	(4.7–5.3) × 109 年
其他命名
	GJ 451，HR 4550, BD +38°2285, HD 103095, CF UMa, LHS 44, LTT 13276, GCTP 2745.00, SAO 62738, FK5 1307, HIP 57939.

葛羅姆布里吉1830是在大熊座內的一顆恆星。

敘述

它是顆淡黃色的G8 次矮星，史蒂芬·葛羅姆布里吉在1806年至1830年使用格魯姆布里奇子午儀發現，並在1838年發表在他身後出版的拱極星目錄中。在1842年，弗里德里希·阿格蘭德注意到它的高自行。

它與太陽系的地球相距29.7光年，意味著他的絕對星等幾乎就等於視星等。它是在銀暈內的恆星，在太陽附近只有0.1%至0.2%這樣的恆星。像大多數的暈星一樣，他是貧金屬星 ^[9]。

因為有175天的周期，曾一度懷疑是聯星，但目前的共識是單獨的一顆恆星。事實上，過去被懷疑的伴侶是觀測上的"超級閃焰" －類似太陽的閃焰，但是能量高達數億倍^[9]^[10]。

自行

當發現它有比任何其他恆星更高的自行時，它取代了天鵝座61的地位。稍後，因發現卡普坦星降至第二，不久又因發現巴納德星再降至第三。它比前述的恆星都遠，這意味著它有著較大的橫向速度。

實際上，太陽的運動是隨著銀河繞著中心在迴轉，但是像葛羅姆布里吉1830這一類的暈星不會隨著銀河旋轉，因此是"靜止"的，而看似以高速在"逆行"。

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Perryman, M. A. C.; et al.. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.
^ ^2.0 ^2.1 ^2.2 Argue, A. N. UBV photometry of 550 F, G and K type stars. Monthly Notices of the Royal Astronomical Society. 1966, 133: 475. Bibcode:1966MNRAS.133..475A.
^ Johnson, H. L.; Morgan, W. W. Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas. Astrophysical Journal. 1953, 117: 313–352. Bibcode:1953ApJ...117..313J. doi:10.1086/145697.
^ Kukarkin, B. V.; et al. Catalogue of suspected variable stars. Moscow, USSR: Academy of Sciences. 1981. Bibcode:1981NVS...C......0K.
^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. June 20–24, 1966 [2009-09-10]. （原始内容存档于2019-06-26）.
^ ^6.0 ^6.1 Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog. The Astrophysical Journal Supplement Series. February 2007, 168 (2): 297–318. Bibcode:2007ApJS..168..297T. arXiv:astro-ph/0607235 . doi:10.1086/509763.
^ ^7.0 ^7.1 ^7.2 Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants. Astronomy and Astrophysics. March 2008, 480 (1): 91–101. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788.
^ Mamajek, Eric E.; Hillenbrand, Lynne A. Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics. The Astrophysical Journal. November 2008, 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
^ ^9.0 ^9.1 Groombridge 1830. SolStation. [2011-07-28]. （原始内容存档于2021-02-26）.
^ Rubenstein, Eric P. Superflares and Giant Planets. American Scientist. February 2001, 89 (1): 38. Bibcode:2001AmSci..89...38R. arXiv:astro-ph/0101573 . doi:10.1511/2001.1.38.

外部連結

Israelian, Garik; Rebolo, Rafael; et al. Oxygen Abundances in Unevolved Metal-poor Stars from Near-Ultraviolet OH Lines. Astrophysical Journal. 1998, 507 (2): 805. Bibcode:1998ApJ...507..805I. arXiv:astro-ph/9806235 . doi:10.1086/306351.
SolStation.com: Groombridge 1830 （页面存档备份，存于互联网档案馆）

高自行的發現

AN 19 (1842) 393/394 （页面存档备份，存于互联网档案馆） (in German)
AN 20 (1843) 163/164 （页面存档备份，存于互联网档案馆） (in German)
AN 20 (1843) 279/280 （页面存档备份，存于互联网档案馆）

[aaa323_L49-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 Perryman, M. A. C.; et al.. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.

[mnras133_475-2] 2.0 ^2.1 ^2.2 Argue, A. N. UBV photometry of 550 F, G and K type stars. Monthly Notices of the Royal Astronomical Society. 1966, 133: 475. Bibcode:1966MNRAS.133..475A.

[yerkes53-3] Johnson, H. L.; Morgan, W. W. Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas. Astrophysical Journal. 1953, 117: 313–352. Bibcode:1953ApJ...117..313J. doi:10.1086/145697.

[csvs-4] Kukarkin, B. V.; et al. Catalogue of suspected variable stars. Moscow, USSR: Academy of Sciences. 1981. Bibcode:1981NVS...C......0K.

[rgcrv-5] Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. June 20–24, 1966 [2009-09-10]. （原始内容存档于2019-06-26）.

[apj22168_2_297-6] 6.0 ^6.1 Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog. The Astrophysical Journal Supplement Series. February 2007, 168 (2): 297–318. Bibcode:2007ApJS..168..297T. arXiv:astro-ph/0607235 . doi:10.1086/509763.

[aaa480-7] 7.0 ^7.1 ^7.2 Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants. Astronomy and Astrophysics. March 2008, 480 (1): 91–101. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788.

[apj687-8] Mamajek, Eric E.; Hillenbrand, Lynne A. Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics. The Astrophysical Journal. November 2008, 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.

[solstation-9] 9.0 ^9.1 Groombridge 1830. SolStation. [2011-07-28]. （原始内容存档于2021-02-26）.

[as89_1_38-10] Rubenstein, Eric P. Superflares and Giant Planets. American Scientist. February 2001, 89 (1): 38. Bibcode:2001AmSci..89...38R. arXiv:astro-ph/0101573 . doi:10.1511/2001.1.38.

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葛羅姆布里吉1830

敘述

自行

相關條目

參考資料

外部連結

高自行的發現

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