HD 23753
Star in the constellation Taurus From Wikipedia, the free encyclopedia
HD 23753 is a single[11] star in the equatorial zodiac constellation of Taurus, and is a member of the Pleiades open cluster.[12] It is dimly visible to the naked eye with an apparent visual magnitude of 5.44.[1] The distance to this star, as determined from its annual parallax shift of 7.7 mas, is about 424 light years. It is moving further from the Earth with a heliocentric radial velocity of +8 km/s.[5] The star is positioned near the ecliptic and so is subject to lunar occultations.[13]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus[1] |
| Right ascension | 03h 48m 20.81678s[2] |
| Declination | +23° 25′ 16.4959″[2] |
| Apparent magnitude (V) | 5.44[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9 Vn[4] |
| B−V color index | −0.067±0.008[1] |
| Astrometry | |
| Radial velocity (Rv) | +7.6±0.5[5] km/s |
| Proper motion (μ) | RA: +19.695[2] mas/yr Dec.: −47.113[2] mas/yr |
| Parallax (π) | 7.6909±0.0985 mas[2] |
| Distance | 424 ± 5 ly (130 ± 2 pc) |
| Absolute magnitude (MV) | 0.00[1] |
| Details | |
| Mass | 3.21±0.07[3] M☉ |
| Radius | 2.7[6] R☉ |
| Luminosity | 150.0+16.2 −14.8[3] L☉ |
| Surface gravity (log g) | 4.09[7] cgs |
| Temperature | 11,535+80 −79[3] K |
| Metallicity [Fe/H] | −0.57[7] dex |
| Rotation | 0.6994 d[8] |
| Rotational velocity (v sin i) | 335[3] km/s |
| Age | 125[9] Myr |
| Other designations | |
| NSV 1321, AAVSO 0343+23D, BD+22°563, HD 23753, HIP 17776, HR 1172, SAO 76215[10] | |
| Database references | |
| SIMBAD | data |
This is a B-type main-sequence star with a stellar classification of B9 Vn,[4] where the 'n' indicates "nebulous" lines due to rapid rotation. It is 125 million years old[9] with a projected rotational velocity of 335 km/s,[3] completing a full revolution about its axis every 16.79 hours.[8] HD 23753 has been catalogued as a suspected variable star with the designation NSV 1321,[14] although the amplitude is no more than 0.1 magnitude and it may even be suitable for a photometric standard.[15] Wraight et al. report that STEREO detected very shallow eclipses, with a period of 2.2663 days, during which the brightness falls by 1%.[16]
HD 23753 has 3.21 times the mass of the Sun[3] and 2.7 times the Sun's radius.[6] It is radiating 150 times the Sun's luminosity[3] from its photosphere at an effective temperature of 11,535 K.[3]
References
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