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Eruptive bipolar nebula · evidence and sources

Homunculus Nebula

Also known as Eta Carinae Homunculus, η Carinae Homunculus.

Catalog Position basis, the same label the app shows on the selection card.

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Every aspect, with its origin

One record per aspect. The origin says what kind of thing each value is; the source says where it came from; the limit says what it cannot tell you.

ObservedCatalogComputedReconstructedIllustrativeUndocumented
Position Catalog

Sky position and adopted distance

Homunculus Nebula is placed at J2000 RA 10.8 h, Dec -59.7° in Carina, at an adopted distance of 7,500 light-years.

EpochJ2000
LimitThe bipolar axis uses the observed approximately 132° sky position angle and 41° inclination.
Physical data Catalog

Measured dimensions

Homunculus Nebula (eruptive bipolar nebula; central source Eta Carinae, unresolved massive binary): measured length 1 light-years; ejected mass at least 10 solar masses; expansion more than 580 km/s (Great Eruption ejecta); outer radius used for arrival 0.5 light-years.

Methodvelocity-mapped 3D mesh
Appearance Reconstructed

3D geometry from a velocity-mapped mesh

The close shell is NASA’s published VLT/X-Shooter velocity-mapped 3D mesh, scaled to the observed roughly one-light-year length and oriented to the measured bipolar axis. Color, translucency, and unresolved central-source glow are presentation choices.

Methodvelocity-mapped 3D mesh
LimitEmission points and knots are deterministic presentation samples, not individually catalogued gas parcels.

What is not measured

  • Appearance: a reconstruction from measurements, not a direct observation. 3D geometry from a velocity-mapped mesh. Emission points and knots are deterministic presentation samples, not individually catalogued gas parcels.

Sources cited

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