NGC 2158 is an open cluster in the constellation of Gemini. It is, in angle, immediately southwest of open cluster Messier 35, and is believed to be about 2 billion years old. [2] The two clusters are unrelated, as the subject is around 9,000 light years further away.

NGC 2158 是 雙子座 的一個 疏散星團。

NGC 2158 is a Open Cluster in the Gemini constellation. NGC 2158 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. Given its visual magnitude of 8.6, NGC 2158 is visible with the help of a binocular with a 60-70mm aperture or a small telescope.

2013年1月3日 · An older and more compact open cluster, NGC 2158, is at the lower right. NGC 2158 is four times more distant than M35, over 10 times older, and much more compact with many more stars in roughly the same volume of space. NGC 2158's bright blue stars have self-destructed, leaving cluster light to be dominated by older and yellower stars.

2025年2月27日 · M35 (also cataloged as NGC 2168) is a mere 2800 light-years distant, with 400 or so stars spread out over a volume about 30 light-years across. Bright blue stars frequently distinguish younger open clusters like M35 , whose age is estimated at 150 million years.

NGC 2158 is a very rich and distant star cluster. Several thousand stars in an area of about five minutes of arc. The unusually large number of stars and their symmetrical distributions suggest that this is an intermediate stage from an open star cluster to a globular cluster, but the cluster does not show the central density typical of ...

2021年5月10日 · Bright blue stars frequently distinguish younger open clusters like M35. Contrastingly, NGC 2158, on the upper right, is four times more distant than M35, over 10 times older, and much more compact. NGC 2158’s bright blue stars have self-destructed, leaving cluster light to be dominated by older and yellower stars.

M35 and NGC 2158 are two neighboring open clusters located in the constellation Gemini and are often observed together by astronomy enthusiasts. M35 (upper right in the image) is approximately 912 par...

2002年2月1日 · NGC 2158 turns out to be an intermediate-age open cluster with an anomalously low metal content. The combination of these parameters together with the analysis of the cluster orbit, suggests that the cluster belongs to the old thin disk population.

NGC 2158是双子座的一个疏散星团。 它位于疏散星团 M35 西南，据信距今约20亿年。 这两个星团是不相关的，因为NGC 2158比M35远约9000光年。 NGC2158曾经被认为是球状星系团，被认为是一个中间时代的、金属贫乏的疏散星团，是旧的薄圆盘群中的一员。 NGC 2158 是双子座的一个疏散星团。 发现者是弗里德里希·威廉·赫歇尔。