- Source: NGC 1501
NGC 1501 (also known as the Camel's Eye Nebula or the Oyster Nebula) is a complex planetary nebula located in the constellation of Camelopardalis, it was discovered on 27 August 1787 by William Herschel.
Properties
The central star of the planetary nebula has a spectral type of [WC4], similar to that of a carbon-rich Wolf–Rayet star. It is a pulsating star, meaning that its brightness varies regularly and periodically. In the case of NGC 1501's progenitor star, this is incredibly fast, with the star's brightness changing significantly in just half an hour. An analysis of Gaia data suggests that the central star is a binary system. Visible-light observations capture the glow of gases including hydrogen and nitrogen. The total mass of the nebula is estimated to be around 0.22 M☉, most of which is ionized gas (0.21 M☉) and a small fraction (8.9×10−4 M☉) is carbon-rich dust.
Gallery
References
External links
Media related to NGC 1501 at Wikimedia Commons
http://www.astronomy-mall.com/Adventures.In.Deep.Space/abellcat
http://www.observing.skyhound.com/archives/dec/NGC_1501
Kata Kunci Pencarian:
- Daftar objek NGC
- Nebula Rosette
- New General Catalogue
- Karbonat
- Daftar objek NGC 1001 - 2000
- Alam
- R136a2
- Daftar lubang hitam paling masif
- Daftar bintang di rasi bintang Andromeda
- NGC 1501
- Camelopardalis
- List of planetary nebulae
- NGC 5195
- NGC 5189
- Rosette Nebula
- Wolf–Rayet star
- List of NGC objects (1001–2000)
- Herschel 400 Catalogue
- NGC 1893
