HD 2638
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| 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 |
| 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.
Contents |
[edit] 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.[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 |
[edit] See also
[edit] References
- ^ a b c d e van Leeuwen, F. (2007). "HIP 2350". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=2344. Retrieved 2009-12-04.
- ^ a b Moutou et al (2005). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics 439 (1): 367–373. Bibcode 2005A&A...439..367M. doi:10.1051/0004-6361:20052826. http://www.aanda.org/articles/aa/full/2005/31/aa2826-05/aa2826-05.html.
[edit] External links
Coordinates: 
00h 29m 59.87s, −05° 45′ 50.41″
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