Lesson plan
Lambda Caeli
Lambda Caeli is a star in the southern constellation of Caelum. Its name is a Bayer designation that is Latinized from λ Caeli, and abbreviated Lambda Cae or λ Cae; it is also known by its designations HD 30202 and HR 1518. This star is a challenge to view with the naked eye, having an apparent visual magnitude of 6.24. Based on parallax measurements, Lambda Caeli is known to be around distant from the Sun, but it is drifting closer with a radial velocity of −4 km/s. This object is an aging K-type giant star with a stellar classification of K3/4III. Having exhausted the supply of hydrogen at its core, it has expanded and cooled; now having 31 times the radius of the Sun. With 4.2 times the mass of the Sun, it is radiating 409 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,118 K.
Article summary
Lambda Caeli is a star in the southern constellation of Caelum. Its name is a Bayer designation that is Latinized from λ Caeli, and abbreviated Lambda Cae or λ Cae; it is also known by its designations HD 30202 and HR 1518. This star is a challenge to view with the naked eye, having an apparent visual magnitude of 6.24. Based on parallax measurements, Lambda Caeli is known to be around distant from the Sun, but it is drifting closer with a radial velocity of −4 km/s. This object is an aging K-type giant star with a stellar classification of K3/4III. Having exhausted the supply of hydrogen at its core, it has expanded and cooled; now having 31 times the radius of the Sun. With 4.2 times the mass of the Sun, it is radiating 409 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,118 K.
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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.