葛羅姆布里吉1830 目录 敘述 自行 相關條目 參考資料 外部連結 导航菜单Bibcode:1997A&A...323L..49PBibcode:1966MNRAS.133..475ABibcode:1953ApJ...117..313Jdoi:10.1086/145697Bibcode:1981NVS...C......0KThe Revision of the General Catalogue of Radial VelocitiesBibcode:2007ApJS..168..297TarXiv:astro-ph/0607235doi:10.1086/509763Bibcode:2008A&A...480...91Sdoi:10.1051/0004-6361:20078788Bibcode:2008ApJ...687.1264Mdoi:10.1086/591785Groombridge 1830Bibcode:2001AmSci..89...38RarXiv:astro-ph/0101573doi:10.1511/2001.1.38Bibcode:1998ApJ...507..805IarXiv:astro-ph/9806235doi:10.1086/306351SolStation.com: Groombridge 1830AN 19 (1842) 393/394AN 20 (1843) 163/164AN 20 (1843) 279/280编
聯星HD星表大熊座次矮星
大熊座G8次矮星史蒂芬·葛羅姆布里吉格魯姆布里奇子午儀拱極星目錄弗里德里希·阿格蘭德自行太陽系絕對星等視星等銀暈太陽貧金屬星聯星閃焰自行天鵝座61卡普坦星巴納德星銀河Template:Star systems within 25 – 30 light-yearsTemplate:Nearest bright star systems
葛羅姆布里吉1830
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  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[1] |
赤緯 | +37° 43′ 07.239″[1] |
視星等（V） | 6.44[2] |
| 特性 | |
| 光谱分类 | G8Vp[3] |
| U−B 色指数 | +0.16[2] |
| B−V 色指数 | +0.75[2] |
| 变星类型 | Suspected[4] |
| 天体测定 | |
| 徑向速度 (Rv) | -98.0[5] km/s |
| 自行 (μ) | 赤经：4,003.69[1]mas/yr 赤纬：-5,813.00[1]mas/yr |
| 视差 (π) | 109.22 ± 0.78[1]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[6]M☉ |
| 半徑 | 0.66[6]R☉ |
| 表面重力 (log g) | 4.68[7] |
| 亮度 | 0.19 L☉ |
| 溫度 | 5,074[7]K |
| 金屬量 | [Fe/H] = -1.33[7] |
| 年齡 | (4.7–5.3) × 109[8]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。
目录
1 敘述
2 自行
3 相關條目
4 參考資料
5 外部連結
5.1 高自行的發現
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，不就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"。
相關條目
- 太空
- Category:恆星
參考資料
^ 1.01.11.21.31.4 Perryman, M. A. C.; et al.. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P. 引文使用过时参数coauthor (帮助)
^ 2.02.12.2 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. 引文使用过时参数coauthors (帮助)
^ Kukarkin, B. V.; 等. Catalogue of suspected variable stars. Moscow, USSR: Academy of Sciences. 1981. Bibcode:1981NVS...C......0K. 引文格式1维护：显式使用等标签 (link)
^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. (编) Batten, Alan Henry; Heard, John Frederick. 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].
^ 6.06.1 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.
^ 7.07.17.2 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.
^ 9.09.1 Groombridge 1830. SolStation.
^ 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; 等. 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. 引文格式1维护：显式使用等标签 (link)- SolStation.com: Groombridge 1830
高自行的發現
AN 19 (1842) 393/394 (in German)
AN 20 (1843) 163/164 (in German)- AN 20 (1843) 279/280
Template:Star systems within 25 – 30 light-years
Template:Nearest bright star systems
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分类：
- 聯星
- HD星表
- 大熊座
- 次矮星
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