description Abell 31 (Sh2-290) Overview
Abell 31, also designated Sh2-290, is a large and extremely faint planetary nebula in the constellation Cancer. George Abell catalogued it in 1966, and its broad, diffuse structure reflects the long-term expansion and fading of material expelled by its central star. It is regarded as an old, geometrically evolved planetary nebula and is primarily studied through deep imaging and emission-line observations.
help Abell 31 (Sh2-290) FAQ
How good is Abell 31 (Sh2-290)?
Abell 31 (Sh2-290) scores 5.06/10 (Mediocre) on Lunoo, making it rated in the Nebula category.
What are the best alternatives to Abell 31 (Sh2-290)?
See our alternatives page for Abell 31 (Sh2-290) for a ranked list with scores. Top alternatives include: Jones 1 (PK 104-29.1), Medusa Nebula (Abell 21), Jones-Emberson 1 (PK 164+31.1).
How does Abell 31 (Sh2-290) compare to Jones 1 (PK 104-29.1)?
See our detailed comparison of Abell 31 (Sh2-290) vs Jones 1 (PK 104-29.1) with scores, features, and an AI-powered verdict.
Is Abell 31 (Sh2-290) worth it in 2026?
With a score of 5.06/10, Abell 31 (Sh2-290) is a solid option in Nebula. See all Nebula ranked.
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