Astronomy:NGC 6164
| Nebula | |
|---|---|
 | |
| Observation data: J2000 epoch | |
| Right ascension | 16h 33m 42s |
| Declination | −48° 04′ 47″ |
| Distance | 3,870 ly (1,188 pc) |
| Apparent magnitude (V) | 6.71 |
| Constellation | Norma |
| Physical characteristics | |
| Dimensions | 3.0' × 3.0' |
| Designations | NGC 6164, AM 1630-475, ESO 226-EN 012 |
NGC 6164, known as the Dragon's Egg Nebula,[1][2] is an emission nebula located in the constellation Norma. The nebula was discovered by astronomer John Herschel on the 1st of July 1834[3][4], and is approximately 3,870 light years from the Solar System.
Its shape gives it the appearance of a planetary nebula resulting from the death of an old star similar to the Sun, but it is in reality an emission nebula. The gas from this nebula was ejected by the star located at its center, and this is also the source of its energy. In the Henry Draper Catalogue, this star is designated as HD 148937.[5][6] It is a very young O-type star whose age is between three and four million years.[7][8] Surrounded by its magnetic field,[9][10] this star is about 40 times more massive than the Sun, and is expected to end its life on the main sequence in three to four million years.[8]
See also
External links
References
- ↑ information@eso.org. "The nebula NGC 6164/6165 in the constellation of Norma" (in en). https://www.eso.org/public/images/eso2407d/.
- ↑ Starr, Michelle (2024-04-11). "Enigmatic 'Dragon's Egg' Star Is a Magnetic Monster And We Finally Know Why" (in en-US). https://www.sciencealert.com/enigmatic-dragons-egg-star-is-a-magnetic-monster-and-we-finally-know-why.
- ↑ Herschel, John Frederick William (1847). "Results of astronomical observations made during the years 1834, 5, 6, 7, 8, at the Cape of Good Hope; being the completion of a telescopic survey of the whole surface of the visible heavens, commenced in 1825" (in en). London. https://ui.adsabs.harvard.edu/abs/1847raom.book.....H/abstract.
- ↑ Herschel, John F. W. (John Frederick William); United States Military Academy, former owner DSI (1847). Results of astronomical observations made during the years 1834, 5, 6, 7, 8, at the Cape of Good Hope : being the completion of a telescopic survey of the whole surface of the visible heavens, commenced in 1825. Smithsonian Libraries. London : Smith, Elder and Co.. http://archive.org/details/Resultsastronom00Hers.
- ↑ info@noirlab.edu. "Nebula NGC 6164-5" (in en). https://www.noirlab.edu/public/images/gemini0605a/.
- ↑ Henize, Karl G. (1959-01-01). "A new planetary nebula NGC 6164-65 (Cederblad 135a, b).". The Astronomical Journal 64: 51. doi:10.1086/108043. ISSN 0004-6256. Bibcode: 1959AJ.....64S..51H. https://ui.adsabs.harvard.edu/abs/1959AJ.....64S..51H.
- ↑ "A Halo for NGC 6164". https://www.as.arizona.edu/gallery-slideshow/83.
- ↑ 8.0 8.1 "APOD: 2014 May 22 - A Halo for NGC 6164". https://apod.nasa.gov/apod/ap140522.html.
- ↑ Lim, Beomdu; Naze, Yael; Chang, Seok-Jun; Hutsemekers, Damien (2023-12-05). "A Morpho-Kinematic Study of the Enigmatic Emission Nebula NGC 6164/5 Surrounding the Magnetic O-type Star HD 148937". The Astrophysical Journal 961 (1): 72. doi:10.3847/1538-4357/ad12c4. Bibcode: 2024ApJ...961...72L.
- ↑ Wade, G. A.; Grunhut, J.; Gräfener, G.; Howarth, I. D.; Martins, F.; Petit, V.; Vink, J. S.; Bagnulo, S. et al. (2012-01-01). "The spectral variability and magnetic field characteristics of the Of?p star HD 148937". Monthly Notices of the Royal Astronomical Society 419 (3): 2459–2471. doi:10.1111/j.1365-2966.2011.19897.x. ISSN 0035-8711. Bibcode: 2012MNRAS.419.2459W.
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