V509 Cassiopeiae
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 23h00m05.1s |
| Declination | +56°56′43″ |
| Apparent magnitude (V) | +5.10 |
| Spectral Characteristics | |
| Spectral type | G40 |
| U-B color index | +1.16 |
| B-V color index | +1.42 |
| Variable type | semiregular |
| Astrometry | |
| Radial velocity (Rv) | −58 km/s |
| Proper motion (μ) | RA: −2.94 mas/yr Dec.: −3.09 mas/yr |
| Parallax (π) | -0.15 ± 0.57 mas |
| Distance | >7800 ly (>2400 pc) |
| Absolute magnitude (MV) | −6.77 |
| Other designations | |
V509 Cassiopeiae (V509 Cas) is a star in the constellation Cassiopeia.
V509 Cassiopeiae is a yellow-white F-type hypergiant with a mean apparent magnitude of +5.10. It is at least 7800 light years from Earth. It is classified as a semiregular variable star and its brightness varies from magnitude +4.75 to +5.5.
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