Astronomy:HD 24496
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus[1] |
| Right ascension | 03h 54m 28.03326s[2] |
| Declination | +16° 36′ 57.7897″[2] |
| Apparent magnitude (V) | 6.81[1] (6.9 + 11.1)[3] |
| Characteristics | |
| Spectral type | G7V[4] + M2V[5] |
| Apparent magnitude (B) | 7.529[1] |
| Apparent magnitude (R) | 6.40[1] |
| Apparent magnitude (I) | 6.000[1] |
| Apparent magnitude (J) | 5.384±0.024[1] |
| Apparent magnitude (H) | 5.102±0.026[1] |
| Apparent magnitude (K) | 4.995±0.017[1] |
| B−V color index | 0.719±0.001[1] |
| Astrometry | |
| Radial velocity (Rv) | +18.99±0.09[1] km/s |
| Proper motion (μ) | RA: +214.191[2] mas/yr Dec.: −167.336[2] mas/yr |
| Parallax (π) | 48.8107 ± 0.0474[2] mas |
| Distance | 66.82 ± 0.06 ly (20.49 ± 0.02 pc) |
| Absolute magnitude (MV) | 5.26[1] |
| Orbit[6] | |
| Primary | A |
| Companion | B |
| Period (P) | 589+57 −84 years |
| Semi-major axis (a) | 80.2+4.6 −7.8 au |
| Eccentricity (e) | 0.099+0.130 −0.054 |
| Inclination (i) | 117.11+2.90 −0.91° |
| Longitude of the node (Ω) | 38.7+1.2 −1.4° |
| Periastron epoch (T) | JD = 2577107+8299 −10043 |
| Argument of periastron (ω) (secondary) | 318+13 −32° |
| Details[7] | |
| A | |
| Mass | 0.941±0.053[6] 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 | 0.5389+0.0082 −0.0081[6] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
| B | |
HD 24496 is a binary star[9] system in the equatorial constellation of Taurus. The combined apparent visual magnitude of the pair is 6.81,[1] 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,[2] and is drifting further away with a radial velocity of +19 km/s.[1] It is traversing the celestial sphere with a proper motion of 0.276″ per year.[10]
The magnitude 6.9[3] primary star, designated component A, is a G-type main-sequence star with a stellar classification of G7V.[4] 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.[7]
The secondary companion, component B, is of magnitude 11.1[3] red dwarf of class M2V[5] that shares a common proper motion with the primary.[11] They have an orbital separation of 80 astronomical units, taking 590 years to complete an orbit around their centre of mass.[6]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M.
- ↑ 4.0 4.1 Koen, C. et al. (2010), "UBV(RI)C JHK observations of Hipparcos-selected nearby stars", Monthly Notices of the Royal Astronomical Society 403 (4): 1949, doi:10.1111/j.1365-2966.2009.16182.x, Bibcode: 2010MNRAS.403.1949K.
- ↑ 5.0 5.1 Raghavan, Deepak et al. (September 2010), "A Survey of Stellar Families: Multiplicity of Solar-type Stars", The Astrophysical Journal Supplement 190 (1): 1–42, doi:10.1088/0067-0049/190/1/1, Bibcode: 2010ApJS..190....1R.
- ↑ 6.0 6.1 6.2 6.3 Giovinazzi, Mark R.; Blake, Cullen H.; Robertson, Paul; Lin, Andrea S. J.; Gupta, Arvind F.; Mahadevan, Suvrath; Fernandes, Rachel B.; Wright, Jason T. et al. (2025-05-18), "The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems", The Astronomical Journal 170: 52, doi:10.3847/1538-3881/add922, Bibcode: 2025AJ....170...52G
- ↑ 7.0 7.1 Marsden, S. C. et al. (November 2014), "A BCool magnetic snapshot survey of solar-type stars", Monthly Notices of the Royal Astronomical Society 444 (4): 3517–3536, doi:10.1093/mnras/stu1663, Bibcode: 2014MNRAS.444.3517M.
- ↑ "HD 24496". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+24496.
- ↑ Fuhrmann, K. et al. (February 2017), "Multiplicity among Solar-type Stars", The Astrophysical Journal 836 (1): 23, doi:10.3847/1538-4357/836/1/139, 139, Bibcode: 2017ApJ...836..139F.
- ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal 129 (3): 1483–1522, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L.
- ↑ Abt, Helmut A.; Willmarth, Daryl (January 2006), "The Secondaries of Solar-Type Primaries. I. The Radial Velocities", The Astrophysical Journal Supplement Series 162 (1): 207–226, doi:10.1086/498095, Bibcode: 2006ApJS..162..207A.
Coordinates: 
03h 54m 28.0332s, +16° 36′ 57.793″
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