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HD 143787

Star in the constellation of Scorpius

Star in the constellation of Scorpius

| b-v = 1.245

HD 143787 is a single star in the southern constellation of Scorpius. It is a fifth magnitude star – apparent visual magnitude of 4.973, and hence is visible to the unaided eye. The distance to HD 143787 can be estimated from its annual parallax shift of , yielding a separation of 227 light years. It is moving closer to Earth with a heliocentric radial velocity of −37.9 km/s, and should come within 32.61 pc in 1.2 million years.

This is an evolved giant star with a stellar classification of K3 III. It is a red clump giant, which means it is on the horizontal branch and is generating energy through helium fusion at its core. At the age of 4.46 billion years, it has 1.25 times the mass of the Sun and is radiating 61.7 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,370 K.

References

| display-authors=1 | last1=Liu | first1=Y. J.

References

  1. "HD 143787".
  2. {{cite DR2
  3. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
  4. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal.
  5. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars *". Astronomy & Astrophysics.
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k-type-giants horizontal-branch-stars scorpius durchmusterung-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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