Lesson plan
Lambda2 Sculptoris
Lambda 2 Sculptoris is an orange-hued star in the southern constellation of Sculptor. On dark nights it is faintly visible to the naked eye, having an apparent visual magnitude of +5.90. Based upon an annual parallax shift of 9.63 mas as measured from Earth, it is located at a distance of 331 light-years. It has a relatively large proper motion, advancing per year across the sky. The spectrum of this star matches a spectral class of K1III, with the luminosity class III indicating it is a giant star that has exhausted the hydrogen at its core. It is now fusing helium, being in the evolutionary stage known as the horizontal branch. Estimates of its mass and age give two different values: 1.12 or 1.26 solar masses and 4.64 or 6.50 billion years. It has expanded to 12.01 times the Sun's radius and radiates 56.7 times the solar luminosity from its photosphere at an effective temperature of .
Article summary
Lambda 2 Sculptoris is an orange-hued star in the southern constellation of Sculptor. On dark nights it is faintly visible to the naked eye, having an apparent visual magnitude of +5.90. Based upon an annual parallax shift of 9.63 mas as measured from Earth, it is located at a distance of 331 light-years. It has a relatively large proper motion, advancing per year across the sky. The spectrum of this star matches a spectral class of K1III, with the luminosity class III indicating it is a giant star that has exhausted the hydrogen at its core. It is now fusing helium, being in the evolutionary stage known as the horizontal branch. Estimates of its mass and age give two different values: 1.12 or 1.26 solar masses and 4.64 or 6.50 billion years. It has expanded to 12.01 times the Sun's radius and radiates 56.7 times the solar luminosity from its photosphere at an effective temperature of .
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.