| Emission nebula | |
|---|---|
| Planetary nebula | |
 | |
| Observation data: J2000 epoch | |
| Right ascension | 21h 14m 15.25s[1] |
| Declination | +46° 17′ 16.1″[1] |
| Distance | 5260 ly (1613[2] pc) |
| Apparent magnitude (V) | 12.1[3] |
| Apparent diameter | 1.02′ |
| Constellation | Cygnus |
| Designations | PK 088-01 1, PN ARO 41, IRAS 21124+4604 |
NGC 7048 is a planetary nebula in the constellation of Cygnus. The bright star to the lower left of the nebula is a magnitude 10.5 star, designated TYC 3589-4652-1. The nebula is slightly brighter along the west and east sides.[4] This planetary nebula has an apparent magnitude of 12.1.[3] NGC 7048 was discovered by Édouard Stephan on 19 October 1878 using a 31.5-inch reflector.[5]
The central star of NGC 7048 is thought to be a white dwarf. The planetary nebula itself has an elliptical shape; from its low surface brightness it is thought to be highly evolved.[4]
- ^ a b "NGC 7048". simbad.u-strasbg.fr. Retrieved 31 January 2022.
- ^ Stanghellini, Letizia; Shaw, Richard A.; Villaver, Eva (2008). "The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale". The Astrophysical Journal. 689 (1): 194–202. arXiv:0807.1129. Bibcode:2008ApJ...689..194S. doi:10.1086/592395. S2CID 119257242.
- ^ a b "Revised NGC Data for NGC 7048 - Hartmut Frommert - SEDS". seds.org. Retrieved 14 March 2017.
- ^ a b Davis, Christopher J.; Smith, Michael D.; Stern, Luke; Kerr, Thomas H.; Chiar, Jean E. (2003). "Near-infrared spectroscopy of (proto)-planetary nebulae: Molecular hydrogen excitation as an evolutionary tracer". Monthly Notices of the Royal Astronomical Society. 344 (1): 262–282. Bibcode:2003MNRAS.344..262D. doi:10.1046/j.1365-8711.2003.06820.x.
- ^ Seligman, Courtney. "New General Catalogue objects: NGC 7000 - 7049". cseligman.com. Retrieved 14 March 2017.