54 Cassiopeiae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 02h 09m 80.26080s |
| Declination | +71° 33′ 07.2268″ |
| Apparent magnitude (V) | +6.587 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | F8V |
| Astrometry | |
| Radial velocity (Rv) | 0.58±0.12 km/s |
| Proper motion (μ) | RA: +306.91 mas/yr Dec.: −239.244 mas/yr |
| Parallax (π) | 37.0117±0.0173 mas |
| Distance | 88.12 ± 0.04 ly (27.02 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.42 |
| Details | |
| Mass | 1.09+0.06 −0.31 M☉ |
| Radius | 1.061 R☉ |
| Luminosity | 1.411 L☉ |
| Surface gravity (log g) | 4.0 cgs |
| Temperature | 6,039 K |
| Metallicity [Fe/H] | +0.25 dex |
| Rotational velocity (v sin i) | 6 km/s |
| Age | 2.5 Gyr |
| Other designations | |
| 54 Cas, BD+70 163, HD 12800, HIP 10031, G 244-50 | |
| Database references | |
| SIMBAD | data |
54 Cassiopeiae is a star in the northern constellation Cassiopeia. Located 88 ly (27 pc) from Earth, it has an apparent magnitude of 6.59, which makes it hard to be seen by the naked eye even from dark skies. Its absolute magnitude is 4.4. It is a F-type main-sequence star with a stellar classification F8V, currently fusing atoms of hydrogen into helium at its core.
Astrometric measurements by the Gaia spacecraft suggested the presence of a planetary companion to 54 Cassiopeiae, seven times more massive than Jupiter and with an orbital period of 401 days (1.10 years). This was later rejected by the Gaia team as a false positive caused by a software error. Radial velocity observations also show no evidence for this planet.