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Pi
Its story
Pi Arae is a white main-sequence to subgiant star 145 light-years away, almost twice the Sun's mass and thirteen times more luminous. Just 55 arcminutes to her north lies NGC 6397, one of the closest globular clusters to Earth: a hundred thousand ancient stars packed into a compact ball. From our perspective Pi seems to stand guard at the entrance of that old swarm.
- Constellation
- Ara
- Apparent magnitude
- 5.25
- Distance
- 145.4 light years
- Coordinates (J2000)
- RA 264.523° · Dec -54.500°
- Catalogue
- HIP 86305 · HD 159492
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