| Emission nebula | |
|---|---|
| H II region | |
 North America Nebula in false color narrowband | |
| Observation data: J2000.0 epoch | |
| Right ascension | 20h 59m 17.1s[1] |
| Declination | +44° 31′ 44″[1] |
| Distance | 2,590 ± 80 ly (795 ± 25[2] pc) |
| Apparent magnitude (V) | 4 |
| Apparent dimensions (V) | 120 × 100 arcmin[3] |
| Constellation | Cygnus |
| Physical characteristics | |
| Radius | 45 [4] ly |
| Designations | NGC 7000, Sharpless 117, Caldwell 20 |
The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus, close to Deneb (the tail of the swan and its brightest star). It is named because its shape resembles North America.
- ^ a b "NASA/IPAC Extragalactic Database". Results for NGC 7000. Retrieved 2006-10-17.
- ^ Kuhn, Michael A.; Hillenbrand, Lynne A.; Carpenter, John M.; Menendez, Angel Rodrigo Avelar (2020). "The Formation of a Stellar Association in the NGC 7000/IC 5070 Complex: Results from Kinematic Analysis of Stars and Gas". The Astrophysical Journal. 899 (2): 128–167. arXiv:2006.08622. Bibcode:2020ApJ...899..128K. doi:10.3847/1538-4357/aba19a. S2CID 219708730.
- ^ Frommert, Hartmut; Kronberg, Christine (2020). "NGC 7000". SEDS. Archived from the original on 18 May 2021. Retrieved 26 August 2020.
- ^ distance × sin( diameter_angle / 2 ) = 45ly