HD 4628
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Pisces |
| Right ascension | 00h 48m 22.98s[1] |
| Declination | +05° 16′ 50.2″[1] |
| Apparent magnitude (V) | 5.75 |
| Characteristics | |
| Spectral type | K2.5 V[2] |
| U−B color index | 0.59 |
| B−V color index | 0.89 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | -12.6 km/s |
| Proper motion (μ) | RA: 757.11 ± 0.48[1] mas/yr Dec.: -1,141.33 ± 0.34[1] mas/yr |
| Parallax (π) | 134.14 ± 0.51[1] mas |
| Distance | 24.31 ± 0.09 ly (7.45 ± 0.03 pc) |
| Absolute magnitude (MV) | 5.88 |
| Details | |
| Mass | 0.70 ± 0.10[3] M☉ |
| Radius | 0.749 ± 0.051[4] R☉ |
| Luminosity | 0.28[3] L☉ |
| Surface gravity (log g) | 4.39 ± 0.16[3] cgs |
| Temperature | 5,829 ± 41[3] K |
| Metallicity [Fe/H] | –0.22[5] dex |
| Rotation | 38.0 days[5] |
| Age | 5.4[6] Gyr |
| Other designations | |
HD 4628 (96 G. Piscium) is a main sequence dwarf star in the constellation Pisces. It has a spectral classification of K2, giving it an orange-red hue and a slightly smaller mass and girth than our Sun. It lies at a distance of approximately 24 light years from us and has a relatively high proper motion.[1] The apparent magnitude is just sufficient for this star to be viewed with the unaided eye. The star appears to be slightly older than our Sun—approximately 5.4 billion years old.[6]
No definitive companion has yet been found in orbit around this star. In 1958 it was thought to have stellar companion that was also a flare star, but this was subsequently disproved.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Hartkopf & McAlister, 1984, "Binary stars unresolved by speckle interferometry", Astronomical Society of the Pacific, vol. 96.
External links
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