NGC 6866
外观
NGC 6866 | |
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观测资料 (J2000 历元) | |
星座 | 天鹅座 |
赤经 | 20h 03m 55.9s[1] |
赤纬 | +44° 09′ 29″[1] |
距离 | 4.35 ± 0.53 kly(1.335 ± 0.163 kpc)[2] |
视星等 (V) | 7.6[3] |
视大小 (V) | ′ 7[3] |
物理特征 | |
质量 | M☉ 1,274.52 [4] M☉ |
半径 | 25.1 ± 3.6 ly(7.7 ± 1.1 pc)[4] |
估计年龄 | ±50 Ma 430[5] |
其他名称 | NGC 6866[6] |
NGC 6866是在星座天鹅座的一个年轻的疏散星团[5]。它是德国天文学家卡罗琳·赫歇尔在178年7月23日发现的[3]。估计这个星团距离太阳约4.35正负0.53 × 103光年[2],并且以0.12的轻微离心率绕着银河系中心旋转[7]。它显示了±1.14 km/s的日心 12.18径向速度[4]。

星团的角半径估计约为′±3′,而 21核心半径为 ±1.8′。总共有1,357颗 10.3′主序恒星被确定为可能的星团成员。估计成员恒星的总质量为M☉。它显示了每百万年1.92颗恒星的损失率 1,274.52 [4]。该星团的金属丰度(质量大于氦的元素丰度)与太阳相似[7]。
NGC 6866是开普勒太空望远镜曾观察的四个星团之一。通过开普勒的数据分析,NGC 6866的年龄估计约为4.3亿年[5]。该星团包括31颗盾牌座δ型和8颗剑鱼座γ型变星,以及4颗食双星和106颗有星斑而显示旋转调变的恒星[8];还有两个系统是大熊座W型变星 [9]。
参考文献
[编辑]- ^ 1.0 1.1 Tarricq, Y.; et al. 3D kinematics and age distribution of the open cluster population. Astronomy & Astrophysics. March 2021, 647. id. A19. Bibcode:2021A&A...647A..19T. arXiv:2012.04017
. doi:10.1051/0004-6361/202039388.
- ^ 2.0 2.1 Spina, L.; et al. The GALAH survey: Tracing the Galactic disc with open clusters. Monthly Notices of the Royal Astronomical Society. 2021, 503 (3): 3279. Bibcode:2021MNRAS.503.3279S. arXiv:2011.02533
. doi:10.1093/mnras/stab471
.
- ^ 3.0 3.1 3.2 Flanders, Tony. In Caroline Herschel's footsteps. skyandtelescope.org. 9 May 2007 [2025-01-14].
- ^ 4.0 4.1 4.2 4.3 Joshi, Gireesh C.; Tyagi, R. K. Identification of cluster MS stars and their implication - I. NGC 2099 and NGC 6866. Monthly Notices of the Royal Astronomical Society. January 2016, 455 (1): 785–805. Bibcode:2016MNRAS.455..785J. doi:10.1093/mnras/stv2353
.
- ^ 5.0 5.1 5.2 Brogaard, K.; et al. Asteroseismic age estimate of the open cluster NGC 6866 using Kepler and Gaia. Astronomy & Astrophysics. 2023, 679: A23. Bibcode:2023A&A...679A..23B. arXiv:2308.12731
. doi:10.1051/0004-6361/202347330.
- ^ NGC 6866. SIMBAD. 斯特拉斯堡天文资料中心.
- ^ 7.0 7.1 Bostancı, Z. F.; et al. A comprehensive study of the open cluster NGC 6866. Monthly Notices of the Royal Astronomical Society. October 2015, 453 (1): 1095–1107. Bibcode:2015MNRAS.453.1095B. arXiv:1507.05968
. doi:10.1093/mnras/stv1665
.
- ^ Balona, L. A.; et al. Pulsation and rotation of Kepler stars in the NGC 6866 field. Monthly Notices of the Royal Astronomical Society. February 2013, 429 (2): 1466–1478. Bibcode:2013MNRAS.429.1466B. doi:10.1093/mnras/sts429
.
- ^ Joshi, Yogesh Chandra; et al. Photometric studies of two W UMa type variables in the field of distant open cluster NGC 6866. Research in Astronomy and Astrophysics. April 2016, 16 (4). id. 63. Bibcode:2016RAA....16...63J. arXiv:1510.07060
. doi:10.1088/1674-4527/16/4/063.
外部链接
[编辑]维基共享资源上的相关多媒体资源:NGC 6866
- NGC 6866 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images