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Bipolar planetary nebula · evidence and sources

Butterfly Nebula (NGC 6302)

Also known as Butterfly Nebula, Bug Nebula, NGC 6302, Caldwell 69.

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

Image-field position and adopted distance

Butterfly Nebula (NGC 6302) image-field center is placed at J2000 RA 17.2 h, Dec -37.1° in Scorpius, at an adopted distance of 3,800 light-years.

EpochJ2000
LimitPublished image north rotation: 128.4 degrees right of vertical. Display depth is illustrative.
Physical data Catalog

Image field at the adopted distance

Butterfly Nebula (NGC 6302) (bipolar planetary nebula; central source NGC 6302 central star, dust-obscured stellar remnant): projected footprint at the adopted distance 2.6 × 3 light-years; outer radius used for arrival 1.5 light-years.

Methodmeasured sky-plane structure with constrained display depth
Appearance Reconstructed

Sky-plane structure with a display depth

The light field samples the published telescope composite at its angular scale and adopted distance. Color follows the source’s assigned wavelength palette. Shallow depth is illustrative, not measured tomography; foreground stars and telescope diffraction remain features of the source image.

Methodmeasured sky-plane structure with constrained display depth
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. Sky-plane structure with a display depth. Emission points and knots are deterministic presentation samples, not individually catalogued gas parcels.

Sources cited

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