Abell 21

A 21, A55 16, Abell 21, ARO 388, Medusa Nebula, PK 205+14 1, PN G205.1+14.2, PNG 205.1+14.2, Sh 2-274, Sh2-274, Sharpless 2-274, YM 29

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Reference data

RA · J200007h 29m 2.9s112.262042°

Dec · J2000+13° 14′ 30.1″13.241694°

Magnitude—

Angular size10.3′

Position angle—

Distance—

ConstellationGem

Reference transparencySources & data provenanceSee where catalogue identities and imported reference fields came from.10 records

Catalogue identities

Sharpless (Sh2)Sh2-274Abell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshotSource

Abell PNAbell 21Abell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshotSource

PK planetary nebulaePK 205+14 1Abell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshotSource

PNG / PN GPN G205.1+14.2Abell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshotSource

Reference fields

Angular Size Major ArcminAbell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshot2026-10-14 21:10:10Source

Canonical NameAbell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshot2026-10-14 21:10:10Source

ConstellationAbell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshot2026-10-14 21:10:10Source

Dec DegAbell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshot2026-10-14 21:10:10Source

Object TypeAbell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshot2026-10-14 21:10:10Source

Ra DegAbell planetary nebulae · CDS VizieR V/84 + Sesame via OpenAstro snapshot2026-10-14 21:10:10Source

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