Lesson plan
Pr0211
Pr0211 (sometimes written Pr 0211, also 2MASS J08421149+1916373) is a Sun-like late G or early K-type main-sequence star in the Beehive Cluster, or Praesepe, located 600 light-years away in the constellation Cancer. It is rotationally variable and has a rotation period of 7.97 days, with its spin axis at an inclination of to the plane of the sky. Pr0211 hosts two known exoplanets, and was the first multi-planet system to be discovered in an open cluster. Pr0211 forms a double star system with a K-type main-sequence star known as NGC 2632 JC 280 or 2MASS J08421285+1916040. Although the stars share a similar distance and common proper motion, their relative space velocity appears to be high enough that the pair are not gravitationally bound.
Article summary
Pr0211 (sometimes written Pr 0211, also 2MASS J08421149+1916373) is a Sun-like late G or early K-type main-sequence star in the Beehive Cluster, or Praesepe, located 600 light-years away in the constellation Cancer. It is rotationally variable and has a rotation period of 7.97 days, with its spin axis at an inclination of to the plane of the sky. Pr0211 hosts two known exoplanets, and was the first multi-planet system to be discovered in an open cluster. Pr0211 forms a double star system with a K-type main-sequence star known as NGC 2632 JC 280 or 2MASS J08421285+1916040. Although the stars share a similar distance and common proper motion, their relative space velocity appears to be high enough that the pair are not gravitationally bound.
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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.