HD 2638
From Infogalactic: the planetary knowledge core
| 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 ± 1.0[1] mas/yr |
| Parallax (π) | 20.03 ± 1.49[1] mas |
| Distance | 160 ± 10 ly (50 ± 4 pc) |
| Details | |
| Mass | 0.90 ± 0.10[2] M☉ |
| Radius | 0.80 ± 0.09[2] R☉ |
| Luminosity | 0.43[2] L☉ |
| Surface gravity (log g) | 4.38 ± 0.19[2] cgs |
| Temperature | 5,236 ± 70[2] K |
| Metallicity [Fe/H] | 0.22 ± 0.05[2] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | 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.
Planetary system
In 2005 the discovery of an extrasolar planet HD 2638 b orbiting the star was announced by the Geneva Extrasolar Planet Search Team.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.48 MJ | 0.044 | 3.4442 ± 0.0002 | 0 | — | — |
See also
References
External links
Coordinates: 
00h 29m 59.87s, −05° 45′ 50.41″
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