| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 01h 04m 19.451s[1] |
| Declination | +61° 34′ 48.66″[1] |
| Apparent magnitude (V) | 5.84[2] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | F6V[3] |
| U−Bcolor index | +0.11[2] |
| B−Vcolor index | +0.56[2] |
| Astrometry | |
| Radial velocity (Rv) | −20.40[4] km/s |
| Proper motion (μ) | RA: −79.837mas/yr[1] Dec.: −24.915mas/yr[1] |
| Parallax (π) | 12.7218±0.0301 mas[1] |
| Distance | 256.4 ± 0.6 ly (78.6 ± 0.2 pc) |
| Absolute magnitude (MV) | 1.30[5] |
| Details | |
| Mass | 1.953[3] M☉ |
| Radius | 4.52±0.15[3] R☉ |
| Luminosity | 25.16±1.59[3] L☉ |
| Surface gravity (log g) | 3.86[6] cgs |
| Temperature | 6,089±35[3] K |
| Metallicity [Fe/H] | −0.01[3] dex |
| Rotational velocity (v sin i) | 42.0[7] km/s |
| Age | 1.3[3] Gyr |
| Other designations | |
| BD+60°158,HD 6210,HIP 5021,SAO 11557[8] | |
| Database references | |
| SIMBAD | data |
HR 297 is a solitarystar in the northerncircumpolar constellation ofCassiopeia. It has anapparent visual magnitude of 5.8,[2] making itfaintly visible to the naked eye from dark suburban skies.Parallax measurements put this system at a distance of roughly 256 light years.[1] It is drifting closer with a heliocentricradial velocity of −20.4 km/s.[4]
This is anF-type main sequence star with astellar classification of F7V.[3] Because of the stability of this star, it is used as a standard in thephotometric WBVR system.[9] Theangular diameter of this star has been measured directly using theCHARA Array, yielding an estimate of 4.5 times the diameter of the Sun. Stellar models suggest a mass equal to about twice that of the Sun, with 25 times the Sun's luminosity.[3]
This is a young star with an estimated age of 1.3 billion years.[10] It is rotating rapidly, with aprojected rotational velocity of 42 km/s.[7] The abundance of elements other than hydrogen and helium is about the same as that in the Sun. Theeffective temperature of thestellar atmosphere is 6,089 K,[3] giving it the yellow-white hued glow of anF-type star.[10]
This star has been examined for the presence of aninfrared excess, but no statistically significant amount was detected. The detection of such an excess can indicate the presence of a dustycircumstellar disk.[11]
