HD 24496
HD 24496 is a binary star system in the equatorial constellation of Taurus. The combined apparent visual magnitude of the pair is 6.81, which is too faint to be readily visible to the normal human eye. The system is located at a distance of 66.8 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +19 km/s. It is traversing the celestial sphere with a proper motion of 0.276″ per year.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 54m 28.03326s |
| Declination | +16° 36′ 57.7897″ |
| Apparent magnitude (V) | 6.81 (6.9 + 11.1) |
| Characteristics | |
| Spectral type | G7V + M2V |
| Apparent magnitude (B) | 7.529 |
| Apparent magnitude (R) | 6.40 |
| Apparent magnitude (I) | 6.000 |
| Apparent magnitude (J) | 5.384±0.024 |
| Apparent magnitude (H) | 5.102±0.026 |
| Apparent magnitude (K) | 4.995±0.017 |
| B−V color index | 0.719±0.001 |
| Astrometry | |
| Radial velocity (Rv) | +18.99±0.09 km/s |
| Proper motion (μ) | RA: +214.191 mas/yr Dec.: −167.336 mas/yr |
| Parallax (π) | 48.8107 ± 0.0474 mas |
| Distance | 66.82 ± 0.06 ly (20.49 ± 0.02 pc) |
| Absolute magnitude (MV) | 5.26 |
| Details | |
| A | |
| Mass | 0.956+0.030 −0.036 M☉ |
| Radius | 0.91±0.03 R☉ |
| Luminosity | 0.705+0.073 −0.076 L☉ |
| Surface gravity (log g) | 4.52+0.03 −0.04 cgs |
| Temperature | 5,572±44 K |
| Metallicity [Fe/H] | −0.01±0.03 dex |
| Rotational velocity (v sin i) | 0.0±0.5 km/s |
| Age | 3.316+3.88 −3.16 Gyr |
| B | |
| Mass | 0.53 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
The magnitude 6.9 primary star, designated component A, is a G-type main-sequence star with a stellar classification of G7V. It is around three billion years old with a low projected rotational velocity. The star has 96% of the mass of the Sun and 91% of the Sun's radius. The metallicity, what astronomers term the abundance of heavier elements, is about the same as in the Sun. The star is radiating 71% of the luminosity of the Sun from its photosphere at an effective temperature of 5,572 K.
The secondary companion, component B, is a magnitude 11.1 red dwarf of class M2V that shares a common proper motion with the primary. They have an angular separation of 2.7″ along a position angle of 256°, which is equivalent to a physical projected separation of 55.2 AU. Their orbital period is around 123,000 years.