Abell 33

Abell 33
Emission nebula
Planetary nebula
	The Abell 33 nebula as seen from Mount Lemmon Observatory
Observation data: J2000 epoch
Right ascension	09h 39m 09.2s
Declination	−02° 48′ 35″
Distance	2.7 kly (0.83 kpc) ly
Apparent magnitude (V)	+12.9
Constellation	Hydra
Notable features	Foreground star gives it a "diamond ring" effect
Designations	PNG 238.0+34.8, PK 238+34.1, ARO 65
	See also: Lists of nebulae

Abell 33 (Also called A33 or the Diamond ring nebula) is a faint spherical planetary nebula located 2700 light years away in the constellation of Hydra. It lies just behind the star HD 83535 which has no relation to the nebula.^[1] The star HD 83535 is also responsible for the "diamond ring" effect seen in the photograph.

The nebula gets its coloration from the O III emissions (doubly ionized oxygen). The nebula is faint making it difficult to be seen using a telescope. The spherical shape of Abell 33 is mainly caused by its central star not having much of a spin.^[2] The nebula shares similar morphology to another nebula with the same spherical shape, the Owl Nebula (M 97), but is much darker than the Owl Nebula.^[3]

References

^ "Abell 33 Planetary Nebula in Hydra | Astrodonimaging.com". Retrieved 2024-05-11.
^ "Abell 33 – Astrodrudis". Retrieved 2023-10-27.
^ "Planetary Nebula Abell 33 | Deep⋆Sky Corner". www.deepskycorner.ch. Retrieved 2023-10-27.

External links

Media related to Abell 33 at Wikimedia Commons

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[1] "Abell 33 Planetary Nebula in Hydra | Astrodonimaging.com". Retrieved 2024-05-11.

[2] "Abell 33 – Astrodrudis". Retrieved 2023-10-27.

[3] "Planetary Nebula Abell 33 | Deep⋆Sky Corner". www.deepskycorner.ch. Retrieved 2023-10-27.

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