HD 4628
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.74[2] |
| Characteristics | |
| Spectral type | K2.5 V[3] |
| U−B Template:Engvar | +0.60[3] |
| B−V Template:Engvar | +0.89[3] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] km/s |
| Proper motion (μ) | RA: +755.894 mas/yr[1] Dec.: Script error: No such module "val". mas/yr[1] |
| Parallax (π) | 134.4948±0.0578 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 6.37[4] |
| Details[5] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Rotation | 38.0 days[6] |
| Age | 5.4[7] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist, Lalande 1299[8] | |
| Database references | |
| SIMBAD | data |
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HD 4628 (96 G. Piscium) is a main sequence star in the equatorial constellation of Pisces. It has a spectral classification of K2.5 V and an effective temperature of 5,055 K, giving it an orange-red hue with a slightly smaller mass and girth than the Sun. HD 4628 lies at a distance of approximately 24.3 light years from the Sun based on parallax.[1] The apparent magnitude of 5.7[2] is just sufficient for this star to be viewed with the unaided eye. The star appears to be slightly older than the Sun—approximately 5.4 billion years in age.[7] The surface activity is low and, based upon the detection of UV emission, it may have a relatively cool corona with a temperature of one million K.[9]
The star has a relatively high proper motion of 1.4″ per year and is moving in our general direction with a radial velocity of −10.4 km/s.[1] HD 4628 will make its closest approach to the Sun in about 32,000 years, when it comes within Script error: No such module "convert"..[10] 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.[11]
See also
References
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- ↑ Script error: No such module "citation/CS1". HD 4628's database entry at VizieR.
- ↑ Script error: No such module "citation/CS1".
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