Planetary Nebula NGC 7354
History
NGC 7354 was discovered on 3 November 1787 by the German-British astronomer William Herschel. Lord Rosse already recognized its nature as a planetary nebula in 1862. John L. E. Dreyer described it in his 1888 «New General Catalogue of Nebulae and Clusters of Stars» as follows: Planetary nebula, bright, small, round, slightly brighter in the center. [141, 196, 315]
Physical Properties
Winds from the central star are believed to play an important role in the shape of planetary nebulae. The composition of NGC 7354 is relatively easy to distinguish: the PN consists of a spherical outer envelope, an ellipsoidal inner envelope, a collection of bright knots concentrated in the center, and two symmetrical jets shooting gas into the interstellar medium on either side. It is believed that these properties were caused by a companion star of the central star, but its presence has not yet been confirmed. The distance to NGC 7354 is about 4200 light years. [350]
| Designations | PN G107.8+02.3: NGC 7354, PK 107+02.1, ARO 55, VV 278, VV' 567 |
| Right Ascension (J2000.0) | 22h 40m 20s |
| Declination (J2000.0) | +61° 17' 06" |
| Dimensions | 23." (optical) |
| Distance | 1.5 kpc |
| Radial Velocity | -41.0 km/s ± 2.0 km/s |
| Expansion Velocity | 25.0 km/s (O-III), 27. km/s (N-II) |
| C-Star Designations | AG82 445 |
| C-Star Magnitude | >16.2 mag (V filter) |
| Discoverer | LORD ROSSE 1862 |
Finder Chart
The planetary nebula NGC 7354 is located in the constellation Cepheus. The best viewing time is May to December when the constellation is highest in the night sky.
