NGC 6709

NGC 6709
NGC 6709
观测资料 (J2000 历元)
星座	天鹰座
赤经	18h 51m 20.6s
赤纬	+10° 20′ 02″
距离	3,510 ly（1,075 pc）
视星等 (V)	6.7
视大小 (V)	13'
物理特征
半径	26 ly (tidal)
估计年龄	141 Myr
其他特征	NGC 6709，Cr 392
	相关条目：疏散星团、NGC天体表

NGC 6709是赤道星座天鹰座中，位于恒星天市左垣六（也称为“吴越”，天鹰座ζ）西南约5°处的一个疏散星团^[4]。它位于银河系的中心方向^[5]距离地球3,510光年^[2]。

该星团的川普勒分类为IV 2 m，被认为是中等丰富^[5]拥有305颗^[6]恒星成员。它的年龄大约是1亿4100万年^[2]；与昴宿星团差不多^[6]。NGC 6709的核半径为2.2 ly（0.68 pc），潮汐半径为26.4 ly（8.08 pc）^[2]。它包含两颗Be星，且其中一颗是壳层星。有一颗成员是红巨星的候选者^[5]。

1984年11月13日傍晚，大卫·李维（英语：David H. Levy）在距离这个星团不到一度之处发现了他的第一颗彗星^[7]。

图集

标示NGC 6709位置的星图。

参考资料

^ ^1.0 ^1.1 Cantat-Gaudin, T.; Anders, F. Clusters and mirages: cataloguing stellar aggregates in the Milky Way. Astronomy & Astrophysics. January 2020, 633: 22. Bibcode:2020A&A...633A..99C. S2CID 208138247. arXiv:1911.07075 . doi:10.1051/0004-6361/201936691. A99.
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Dib, Sami; et al. Structure and mass segregation in Galactic stellar clusters. Monthly Notices of the Royal Astronomical Society. January 2018, 473 (1): 849–859. Bibcode:2018MNRAS.473..849D. arXiv:1707.00744 . doi:10.1093/mnras/stx2413.
^ NGC 6709. SIMBAD. 斯特拉斯堡天文资料中心.
^ Crossen, Craig; Rhemann, Gerald. Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Vienna. 2012: 58. ISBN 9783709106266.
^ ^5.0 ^5.1 ^5.2 Subramaniam, Annapurni; Sagar, Ram. Multicolor CCD Photometry and Stellar Evolutionary Analysis of NGC 1907, NGC 1912, NGC 2383, NGC 2384, and NGC 6709 Using Synthetic Color-Magnitude Diagrams. The Astronomical Journal. February 1999, 117 (2): 937–961. Bibcode:1999AJ....117..937S. S2CID 34294008. doi:10.1086/300716.
^ ^6.0 ^6.1 Cole-Kodikara, Elizabeth M.; et al. NGC 6709: A Faint Zero-Age Main Sequence Open Cluster. The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2–4, 2021. March 2021. Bibcode:2021csss.confE.175C. doi:10.5281/zenodo.4565515. 175.
^ Levy, David H. David Levy's Guide to Observing and Discovering Comets. Cambridge University Press. 2003: 52.

外部链接

维基共享资源上的相关多媒体资源：NGC 6709
NGC 6709 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
webda

这是一篇与星团相关的小作品。您可以通过编辑或修订扩充其内容。

[Cantat-Gaudin_Anders_2020-1] 1.0 ^1.1 Cantat-Gaudin, T.; Anders, F. Clusters and mirages: cataloguing stellar aggregates in the Milky Way. Astronomy & Astrophysics. January 2020, 633: 22. Bibcode:2020A&A...633A..99C. S2CID 208138247. arXiv:1911.07075 . doi:10.1051/0004-6361/201936691. A99.

[Dib_et_al_2018-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Dib, Sami; et al. Structure and mass segregation in Galactic stellar clusters. Monthly Notices of the Royal Astronomical Society. January 2018, 473 (1): 849–859. Bibcode:2018MNRAS.473..849D. arXiv:1707.00744 . doi:10.1093/mnras/stx2413.

[simbad-3] NGC 6709. SIMBAD. 斯特拉斯堡天文资料中心.

[Crossen_Rhemann_2012-4] Crossen, Craig; Rhemann, Gerald. Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Vienna. 2012: 58. ISBN 9783709106266.

[Subramaniam_Sagar_1999-5] 5.0 ^5.1 ^5.2 Subramaniam, Annapurni; Sagar, Ram. Multicolor CCD Photometry and Stellar Evolutionary Analysis of NGC 1907, NGC 1912, NGC 2383, NGC 2384, and NGC 6709 Using Synthetic Color-Magnitude Diagrams. The Astronomical Journal. February 1999, 117 (2): 937–961. Bibcode:1999AJ....117..937S. S2CID 34294008. doi:10.1086/300716.

[Cole-Kodikara_et_al_2021-6] 6.0 ^6.1 Cole-Kodikara, Elizabeth M.; et al. NGC 6709: A Faint Zero-Age Main Sequence Open Cluster. The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2–4, 2021. March 2021. Bibcode:2021csss.confE.175C. doi:10.5281/zenodo.4565515. 175.

[Levy-7] Levy, David H. David Levy's Guide to Observing and Discovering Comets. Cambridge University Press. 2003: 52.

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