HR 297

HR 297
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−B color index +0.11[2]
B−V color index +0.56[2]
Astrometry
Radial velocity (Rv)−20.40[4] km/s
Proper motion (μ) RA: −79.837 mas/yr[1]
Dec.: −24.915 mas/yr[1]
Parallax (π)12.7218 ± 0.0301 mas[1]
Distance256.4 ± 0.6 ly
(78.6 ± 0.2 pc)
Absolute magnitude (MV)1.30[5]
Details
Mass1.953[3] M☉
Radius4.52±0.15[3] R☉
Luminosity25.16±1.59[3] L☉
Surface gravity (log g)3.86[6] cgs
Temperature6,089±35[3] K
Metallicity [Fe/H]−0.01[3] dex
Rotational velocity (v sin i)42.0[7] km/s
Age1.3[3] Gyr
Other designations
BD+60°158, HD 6210, HIP 5021, SAO 11557[8]
Database references
SIMBADdata

HR 297 is a solitary star in the northern circumpolar constellation of Cassiopeia. It has an apparent visual magnitude of 5.8,[2] making it faintly 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 heliocentric radial velocity of −20.4 km/s.[4]

This is an F-type main sequence star with a stellar classification of F7V.[3] Because of the stability of this star, it is used as a standard in the photometric WBVR system.[9] The angular diameter of this star has been measured directly using the CHARA 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 a projected 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. The effective temperature of the stellar atmosphere is 6,089 K,[3] giving it the yellow-white hued glow of an F-type star.[10]

This star has been examined for the presence of an infrared excess, but no statistically significant amount was detected. The detection of such an excess can indicate the presence of a dusty circumstellar disk.[11]

  1. ^ a b c d e Cite error: The named reference GaiaEDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference apj188_53 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i j Cite error: The named reference apj771_1_40 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference mnras371_4_1793 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference apj354 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference aaa493_3_1099 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference csiro was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference mnras427_1_343 was invoked but never defined (see the help page).