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 Olll 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

• http://www.caelumobservatory.com/gallery/abell33.shtml Archived 2017-05-12 at the Wayback Machine
• http://www.skyhound.com/observing/archives/mar/A_33.html

External links

• Media related to Abell 33 at Wikimedia Commons

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