54 Cassiopeiae
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | 02h 09m 80.26080s[2] |
| Declination | +71° 33′ 07.2268″[2] |
| Apparent magnitude (V) | +6.587[3] |
| Characteristics | |
| Evolutionary stage | Main sequence[2] |
| Spectral type | F8V[4] |
| Astrometry | |
| Radial velocity (Rv) | 0.58±0.12[2] km/s |
| Proper motion (μ) | RA: +306.91 mas/yr[2] Dec.: −239.244 mas/yr[2] |
| Parallax (π) | 37.0117±0.0173 mas[2] |
| Distance | 88.12 ± 0.04 ly (27.02 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.42[5] |
| Details[6] | |
| Mass | 0.98+0.05 −0.04 M☉ |
| Radius | 1.082±0.024 R☉ |
| Luminosity | 1.36±0.07 L☉ |
| Surface gravity (log g) | 4.26±0.10 cgs |
| Temperature | 6,000±50 K |
| Metallicity | = −0.24±0.08 |
| Rotational velocity (v sin i) | 6[7] km/s |
| Age | 5.7+1.7 −1.9 Gyr |
| Other designations | |
| 54 Cas, BD+70 163, HD 12800, HIP 10031, G 244-50 | |
| Database references | |
| SIMBAD | data |
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54 Cassiopeiae is a star in the northern constellation Cassiopeia. Located 88 ly (27 pc) from Earth,[2] it has an apparent magnitude of 6.59,[3] which makes it hard to be seen by the naked eye even from dark skies. Its absolute magnitude is 4.4.[5] It is a F-type main-sequence star with a stellar classification F8V, currently fusing atoms of hydrogen into helium at its core.[4]
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).[8][9] This was later rejected by the Gaia team as a false positive caused by a software error.[10] Radial velocity observations also show no evidence for this planet.[11][6]
