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KW Sagittarii: size, dimension and comparison

The adopted reference is about 1.4039E9 km.

Estimated photospheric diameter · 2013 study

1.4039 billion km ≈ 1,403.9 million km. One billion kilometers is 1,000 million kilometers.

A red supergiant in the constellation Sagittarius.

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KW Sagittarii, interpreted illustration
Interpreted illustration · dimension stated in the fact sheet.

What does this number measure?

A red supergiant in the constellation Sagittarius. The disc shown corresponds to the diameter, twice the adopted radius of 1009 nominal solar radii (1 nominal solar radius = 695 700 km). The value is a dated estimate, not an established size record. Rosseland radius of 1 009 ± 142 solar radii in Arroyo-Torres et al. (2013); a historical estimate from 2005 was larger.

Compare the stated dimensions

The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.

Compare with Betelgeuse in the explorer →

Source and limitations

Rosseland radius of 1 009 ± 142 solar radii in Arroyo-Torres et al. (2013); a historical estimate from 2005 was larger.

KW Sagittarii: artistic illustration of a stellar photosphere. A shared generic pattern is used to compare diameters; this is neither a photograph nor a reconstruction of this star. The value and its uncertainties come from the object entry.