NGC 2438 is a planetary nebula in the southern constellation of Puppis. [2] Parallax measurements by Gaia put the central star at a distance of roughly 1,370 light years. [1] It was discovered by William Herschel on March 19, 1786. [3]

NGC 2438是大約8,500年前開始的漸近巨星分支階段從中心恆星噴射出的物質組成。 主星雲大約在該年齡的一半時形成。 行星狀星雲的中心恆星是一顆17.7等的 白矮星 [6]，表面溫度約為75,000K (74,700 °C) [7]。 ^ 跳转到： 1.0 1.1 1.2 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018.

NGC 2438是大約8,500年前開始的漸近巨星分支階段從中心恆星噴射出的物質組成。 主星雲大約在該年齡的一半時形成。 行星狀星雲的中心恆星是一顆17.7等的 白矮星 [6]，表面溫度約為75,000K (74,700 °C) [7]。 ^ 移至： 1.0 1.1 1.2 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018.

ngc 2438是一个多壳行星状星云，具有明亮的内星云，直径为60角秒，由两个有些分离的壳组成。 它正在以37公里/秒的速度膨胀。 该结构被一个较暗的、大部分为圆形的光环包围，西半部更明显，直径为130角秒 [ 3 ] 。

2021年11月4日 · NGC 2438 is a planetary nebula, formed after the death of a Sun-like star. The medium-sized star would have expelled its outer layers of gas into space as it died, leaving behind a white-dwarf core. A halo of glowing gas over 4.5 light-years across surrounds the nebula's brighter inner ring.

2021年2月1日 · M46 and NGC 2438 are easiest to find by dropping 5° due south from 4th-magnitude Alpha (α) Monocerotis, the brightest star in Monoceros. Trying to find that star is its own challenge, especially with less-than-perfect sky conditions. Fortunately, a line extended from Sirius [Alpha (α) Canis Majoris] through Gamma (γ) Canis Majoris for 11 ...

2011年4月7日 · Explanation: NGC 2438 is a planetary nebula, the gaseous shroud cast off by a dying sunlike star billions of years old whose central reservoir of hydrogen fuel has been exhausted. About 3,000 light-years distant it lies within the boundaries of …

2021年11月5日 · NGC 2438 is a planetary nebula, formed after the death of a Sun-like star. The medium-sized star would have expelled its outer layers of gas into space as it died, leaving behind a white-dwarf core. A halo of glowing gas over 4.5 light-years across surrounds the nebula’s brighter inner ring.

NGC 2438是 威廉·赫歇尔 于1786年在 船尾座 内发现的一个 行星状星云。 视觉上，NGC 2438似乎是位于 疏散星团 梅西尔46之内，但实际上它比梅西尔46更靠近我们，只是视线上巧合的对准在一起。 这个行星状星云中心星的 视星等 是17.7等。 NGC 2438是威廉·赫歇尔于1786年在船尾座内发现的一个行星状星云。

2018年6月29日 · NGC 2438（惑星状星雲）, 光度：10.8mag, 直径： 1.3', 分類：PN BKP300(150…