Pease 1

Pease 1
Emission nebula
	Planetary nebula
Observation data: J2000.0 epoch
Distance	33,600 ly
Apparent magnitude (V)	+15.5
Apparent dimensions (V)	3 arcsecs
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

↑ ^1.0 ^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.

External links

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

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Original source: https://en.wikipedia.org/wiki/Pease 1. Read more

[astropix-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.

[OMeara1998-2] 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.

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