Astronomy:NGC 1501
| Emission nebula | |
|---|---|
| Planetary nebula | |
 As seen from the Hubble Space Telescope | |
| Observation data: J2000 epoch | |
| Right ascension | 04h 06m 59.39s[1] |
| Declination | +60° 55′ 14.4″[1] |
| Distance | est. 4,240 ly (1.30 kpc)[2] ly |
| Apparent magnitude (V) | 13.0[1] |
| Apparent dimensions (V) | 0.863' (diameter) |
| Constellation | Camelopardalis |
| Physical characteristics | |
| Radius | 0.5 ly |
| Designations | PK 144+6.1, PN G 144.5+06.5, GC 801, CS 14.4, H 4.53 |
NGC 1501 is a complex planetary nebula located in the constellation of Camelopardalis, it was discovered on the 27th August 1787 by William Herschel.[2][3] It is also known as the Oyster Nebula.[4]
Properties
The central star of the planetary nebula has a spectral type of [WC4], similar to that of a carbon-rich Wolf–Rayet star.[5] 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.[6] Visible-light observations capture the glow of gases including hydrogen and nitrogen.[7] 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.[8]
Gallery
The location of NGC 1501 (circled in red)
NGC 1501 from the 0.8m Schulman Telescope at the Mount Lemmon SkyCenter
References
- ↑ 1.0 1.1 1.2 "SIMBAD Astronomical Database". NGC 1501. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+1501.
- ↑ 2.0 2.1 Sabbadin, F.; Benetti, S.; Cappellaro, E.; Turatto, M. (2000). "The tetra-lobed planetary nebula NGC 1501". Astronomy and Astrophysics 361: 1112–1120. Bibcode: 2000A&A...361.1112S.
- ↑ Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 1500 - 1549". http://cseligman.com/text/atlas/ngc15.htm.
- ↑ "Hubble View of Bubbly Nebula". 17 April 2015. https://www.nasa.gov/content/goddard/hubble-view-of-bubbly-nebula.
- ↑ González-Santamaría, I.; Manteiga, M.; Manchado, A.; Ulla, A.; Dafonte, C.; López Varela, P. (2021). "Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity". Astronomy & Astrophysics 656: A51. doi:10.1051/0004-6361/202141916. Bibcode: 2021A&A...656A..51G.
- ↑ Chornay, N.; Walton, N. A.; Jones, D.; Boffin, H. M. J.; Rejkuba, M.; Wesson, R. (2021). "Towards a more complete sample of binary central stars of planetary nebulae with Gaia". Astronomy & Astrophysics 648: A95. doi:10.1051/0004-6361/202140288. Bibcode: 2021A&A...648A..95C.
- ↑ "Oyster Nebula NGC 1501 As Seen By Hubble - SpaceRef". 7 September 2016. http://spaceref.com/astronomy/nebulae/oyster-nebula-ngc-1501-as-seen-by-hubble.html.
- ↑ Rubio, G.; Toalá, J. A.; Todt, H.; Sabin, L.; Santamaría, E.; Ramos-Larios, G.; Guerrero, M. A. (2022). "Planetary nebulae with Wolf–Rayet-type central stars – IV. NGC 1501 and its mixing layer". Monthly Notices of the Royal Astronomical Society 517 (4): 5166–5179. doi:10.1093/mnras/stac3011. Bibcode: 2022MNRAS.517.5166R.
External links
- http://www.astronomy-mall.com/Adventures.In.Deep.Space/abellcat[yes|permanent dead link|dead link}}]
- http://www.observing.skyhound.com/archives/dec/NGC_1501[yes|permanent dead link|dead link}}]
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