HD 19275

HD 19275
Location of HD 19275 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cassiopeia
Right ascension 03h 11m 56.27016s[1]
Declination +74° 23′ 37.1670″[1]
Apparent magnitude (V) 4.85[2]
Characteristics
Spectral type A2Vnn[3]
U−B color index +0.05
B−V color index +0.035±0.006[2]
Astrometry
Radial velocity (Rv)11.9±3.1[2] km/s
Proper motion (μ) RA: +13.895[1] mas/yr
Dec.: −86.650[1] mas/yr
Parallax (π)19.9554 ± 0.1695 mas[1]
Distance163 ± 1 ly
(50.1 ± 0.4 pc)
Absolute magnitude (MV)1.32[2]
Details
Mass1.80+0.32
−0.29[4] M☉
Radius2.7[5] R☉
Luminosity27.27[2] L☉
Surface gravity (log g)4.20±0.25[4] cgs
Temperature8,875±1,000[4] K
Metallicity [Fe/H]−0.11±0.26[6] dex
Rotational velocity (v sin i)250[7] km/s
Age71+317
−60[4] Gyr
Other designations
BD+73°168, FK5 2222, GC 3759, HD 19275, HIP 14862, HR 932, SAO 4840, GSC 04325-01562[8]
Database references
SIMBADdata

HD 19275 is a single[9] star in the northern constellation of Cassiopeia. It has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.85.[2] The distance to HD 19275 is 163 light years as determined using parallax measurements.[1] It is drifting further away from the Sun with a radial velocity of around 12 km/s.[2]

This object is an A-type main-sequence star with a stellar classification of A2Vnn.[3] The 'nn' suffix indicates "nebulous" (broad) absorption lines in the spectrum due to rapid rotation. It is spinning with a projected rotational velocity of 250 km/s, which is giving the star an equatorial bulge that is estimated to be 15% larger than the polar radius.[7] The object is an estimated 71[4] million years old with 1.8[4] times the mass of the Sun and about 2.7[5] times the Sun's radius. It is radiating 27[2] times the luminosity of the Sun from its photosphere at an effective temperature of 8,875 K.[4]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference gullikson2016 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference CADARS was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference gaspar2016 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference vanBelle2012 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 Eggleton2008 was invoked but never defined (see the help page).