Plaskett's star
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| Observation data Epoch J2000.0 |
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|---|---|
| Constellation (pronunciation) |
Monoceros |
| Right ascension | 06h 35m |
| Declination | +06° 11' |
| Apparent magnitude (V) | 6.05 |
| Distance | 6600 ly (2023.52 pc) |
| Spectral type | O8 |
| Other designations | |
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HR 2422, BD+6°1309, GC 8631, HIP 31646 , HD 47129
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Plaskett's Star (formal name HR 2422 Monocerotis) is a spectroscopic binary at a distance of around 6600 light-years. It is one of the most massive binary stars known, with a total mass of about one hundred times that of the Sun.
It is named after John Stanley Plaskett, the Canadian astronomer who discovered its binary nature in 1922. The star has a visual magnitude of 6.05, and is located in the constellation of Monoceros.
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