| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Cetus |
| Right ascension | 00h 29m 59.87s [1] |
| Declination | –05° 45′ 50.4″ [1] |
| Apparent magnitude (V) | 9.8 |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Proper motion (μ) | RA: –105.63 ± 1.74 [1] mas/yr Dec.: –223.46 ± 1.04 [1] mas/yr |
| Parallax (π) | 20.03 ± 1.49[1] mas |
| Distance | 160 ± 10 ly (50 ± 4 pc) |
| Details | |
| Other designations | |
| Database references | |
| SIMBAD | data |
| NStED | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 2638 is a dim 10th magnitude star in the constellation of Cetus. It is a yellow dwarf and similar to our Sun. A small telescope is required to view the star.
Contents |
In 2005 the discovery of an extrasolar planet HD 2638 b orbiting the star was announced by the Geneva Extrasolar Planet Search Team.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >0.48 MJ | 0.044 | 3.4442 ± 0.0002 | 0 |