Wolf 424
Template:Short description Template:Sky
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | A: 13.22 ± 0.01 B: 13.21 ± 0.01[3] |
| Characteristics | |
| Spectral type | dM6e/dM6e[4] |
| Variable type | Flare stars[4] |
| Astrometry | |
| Radial velocity (Rv) | −2[5] km/s |
| Parallax (π) | 227.041±0.389 mas[6] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Wolf 424 A | |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[7] Dec.: Script error: No such module "val". mas/yr[7] |
| Absolute magnitude (MV) | 15.03[8] |
| Wolf 424 B | |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[9] Dec.: Script error: No such module "val". mas/yr[9] |
| Absolute magnitude (MV) | 15.02[8] |
| Details | |
| A | |
| Mass | Script error: No such module "val".[6] Template:Solar mass |
| Radius | Script error: No such module "val".[10] Template:Solar radius |
| Temperature | Script error: No such module "val".[11] K |
| B | |
| Mass | Script error: No such module "val".[6] Template:Solar mass |
| Radius | Script error: No such module "val".[10] Template:Solar radius |
| Temperature | Script error: No such module "val".[11] K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist, Cl* Melotte 25 EGG 43, USNO-B1.0 0990-00217846, VVO 74, 2E 2769, JP11 5148, JP11 5149[12] | |
| Database references | |
| SIMBAD | The system |
| A | |
| B | |
| ARICNS | A |
| B | |
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Wolf 424 is a binary star system comprising two red dwarf stars. The stars are located at a distance of 14.37 light-years and hence are among the nearest stars, but due to their faint intrinsic brightness, they are not visible to the naked eye. Wolf 424 is located in the constellation Virgo, between the stars ε Virginis and ο Virginis.
Description
The close binary nature of this star was discovered by Dutch American astronomer Dirk Reuyl in 1941, based upon an elongation of the star found in photographs.[3] The two stars in the Wolf 424 system orbit about each other with a semi-major axis of 4.1 AU and an eccentricity of 0.3. The stars have an orbital period of 15.5 years and have a combined apparent magnitude of about 12.5.
Wolf 424A and Wolf 424B are similar-spectrum and similar-size stars, both red dwarfs with masses of Template:Solar mass and radii of Template:Solar radius, respectively.[10] In 1967, it was discovered that both are flare stars that undergo random increases in luminosity. The system has been designated FL Virginis, and may experience sunspot activity. The stars may undergo variation in the level of flare activity over periods lasting several years.[4]
References
- ↑ Template:Cite constellation
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- ↑ Template:Cite Gaia DR3
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- ↑ Template:Cite Gaia DR3
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Further reading
- W. D. Heintz, "Astrometric study of 4 binary stars", 1972, Astronomical Journal, 77, 160.
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