HD 2638 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 2638 | |
| Constellation | Cetus | |
| Right ascension | (α) | 00h 29m 59.873s[1] |
| Declination | (δ) | –05° 45′ 50.40″[1] |
| Distance | 160 ± 10[1] ly (50 ± 4[1] pc) | |
| Spectral type | G5V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.044 AU |
| Eccentricity | (e) | 0 |
| Orbital period | (P) | 3.4442 ± 0.0002 d |
| Argument of periastron |
(ω) | 0° |
| Time of periastron | (T0) | 2,453,323.206 ± 0.002 JD |
| Semi-amplitude | (K) | 67.4 ± 0.4 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.48 MJ |
| Discovery information | ||
| Discovery date | 2005 | |
| Discoverer(s) | Moutou, Mayor, Bouchy et al. | |
| Discovery method | Radial velocity | |
| Discovery site | Geneva | |
| Discovery status | Published | |
HD 2638 b is a planet of the star HD 2638. It is a typical "hot Jupiter", a planet that orbits its parent star in a very tight "torch orbit". Distance to the star is less than 1/20th Earth's distance from the Sun. One orbital revolution lasts only about three and half days.[2]
References
- 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry - ↑ Moutou, C.; 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.
External links
Coordinates: 
00h 29m 59.87s, −05° 45′ 50.41″
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