Astronomy:Pease 1
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| Emission nebula | |
|---|---|
| Planetary nebula | |
.jpg) | |
| Observation data: J2000.0 epoch | |
| Distance | 33,600 [1] ly |
| Apparent magnitude (V) | +15.5[1] |
| Apparent dimensions (V) | 3 arcsecs[1] |
| Constellation | Pegasus |
| Physical characteristics | |
| Radius | 0.24 ly |
| Absolute magnitude (V) | - |
Pease 1 is a planetary nebula located within the globular cluster M15 33,600 light years away in the constellation Pegasus. It was the first planetary nebula known to exist within a globular cluster when it was discovered in 1928[2] (for Francis G. Pease), and just four more have been found (in other clusters) since.[1] At magnitude 15.5, it requires telescopes with an aperture of at least 300-millimetre (12 in) to be detected.[3]
References
- ↑ 1.0 1.1 1.2 1.3 "Globular Cluster M15 and Planetary Nebula Pease 1". http://www.astropix.com/HTML/SHOW_DIG/M15_Pease1.HTM.
- ↑ O'Meara, Stephen James; Levy, David H. (1998), Deep-Sky Companions: The Messier Objects, Cambridge University Press, p. 74, ISBN 978-0521553322, https://books.google.com/books?id=jis4evHuuzUC&pg=PA74.
- ↑ Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 0-00-717223-0. https://archive.org/details/collinsatlasofni0000dunl.
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