Pease 1

Pease 1Emission nebula

Planetary nebula
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)| -
See also: Lists of nebulae

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. ↑ 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.
2. ↑ 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.
3. ↑ Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 0-00-717223-0. https://archive.org/details/collinsatlasofni0000dunl.

## External links

* Pease 1: Planetary Nebula in Messier 15, SEDS Messier pages

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